VOL. XIV, PP. 7-22 APRIL 2, 1901 
PROCEEDINGS 
OF THE 
BIOLOGICAL SOCIETY OF WASHINGTON 
FIFTH LIST OF ADDITIONS TO THE FLORA OF 
WASHINGTON, D. C. 
BY THEO. HOLM. 
Five years have elapsed since the publication of my fourth 
list of additions to the local flora,* and it will be seen from the 
present paper that these five years of research have materially 
added to the number of species hitherto known to occur in the 
vicinity of Washington, in addition to which I have been able 
to record an extended range of many of the rarer species, for 
merly known from only a very few localities. 
Through Dr. E. L. Greene's painstaking studies of various 
genera, more particularly of Antennaria, Viola, Gerardia, etc., 
these genera now appear to contain a number of excellent 
species, which formerly had been entirely overlooked or more 
or less confused; some of these species have even proved to be 
very common within the District of Columbia. In order to 
facilitate the use of this additional list, I have, with only a very 
few exceptions, followed the nomenclature and arrangement of 
the orders as in the previously published additions, these hav 
ing been arranged in conformity with the fundamental work on 
the Flora, Lester F. Ward's "Guide to the Flora of Washing 
ton and Vicinity, "f 
*Proc. Biol. Soc. Wash. X, pp. 29-43, 1896. 
fBull. 22, U. S. Nat. Mus. 1881. 
2 BIOL. Soc. WASH. VOL. XIV, 1901. (7) 
8 Holm Additions to the Flora of Washington. 
The discovery of species new to a local flora is always a 
great encouragement to the explorer, but it is nevertheless just 
as important to discover a well known but rare species in new 
localities; the rediscovery of an apparently lost or extinct 
species seems to us to be still more interesting and important, 
and we may cite among such instances the finding of Aralia 
quinquefolia, Cicuta bulbi/era, Phyllanthus and Oystopteris bul- 
bifera. 
It is surprising to see how many rare species may be found 
in old, well known localities, when these are visited regularly 
every month. Frequent excursions to Great Falls, Marshall 
Hall, Surattsville, etc., have brought forth a number of rare 
plants, hitherto overlooked, and even the old and well explored 
region around the Reform School seems to furnish an almost 
incessant increase of new or rare plants. On the other hand 
some of the older and most interesting localities are rapidly un 
dergoing destruction, as for instance the famous Terra Cotta 
swamp, which at present is almost entirely changed to a miser 
able "corn field," and many of the species which were reported 
from that region are no longer to be found there. So much the 
more does it seem necessary to keep permanent track of the 
representatives of our local flora before the immediate vicinity 
becomes altogether transformed to building-lots and gardens. 
In the present list some very interesting contributions have 
been kindly furnished by Dr. E. L. Greene, Messrs. Thos. H. 
Kearney, Jr., Wm. R. Maxon, G. W. Oliver, and Wm. Pal 
mer, whose names appear in connection with their respective 
discoveries; where no collector is named, the species has been 
found by the writer himself, and the plants are all deposited in 
his private herbarium. The species marked with an asterisk 
are new to the local flora. 
i. Clematis Virginiana L. 
Four Mile Run; marshes near Kenilworth. 
12. Ranunculus ambigens Wats. 
Muddy creek-bottom near Marshall Hall. E. L. Greene. 
13. Ranunculus pusillus Poir. 
In a pool among the rocks near Sandy Landing. 
15. Ranunculus abortivus L., var. micranthus Nutt. 
Not uncommon in the woods between Sandy Landing and Great Falls. 
Holm Additions to the Flora of Washington. 9 
2o5. Ranunculus septentrionalis Poir. 
High Island. E. L. Greene; swamps near Marshall Hall. 
33. Caulophyllum thalictroides Michx. 
Ravine near mouth of Scott's Run, Va. 
34. Jeffersonia diphylla Pers. 
Ravine near mouth of Scott's Run, Va. 
40. Papaver dubium L. 
Meadow near mouth of Scott's Run, Ya. 
47. Nasturtium sylvestre R. Br. 
Wet places among rocks at Great Falls; on the river-shore at the 
mouth of Scott's Run, Ya.; High Island; ditches near Alexandria. 
49 a. Nasturtium palustre 1). C. var hispidum Fisch. & Mey. 
Ditch near Marshall Hall. 
61. Cardamine hirsuta L. (C. intermedia Horn.) 
Swamps near Terra Gotta. 
62. Cardamine parviflora L. 
Abundant in the woods near Soldiers' Home; Sandy Landing; Great 
Falls and several other places; evidently not uncommon in the District. 
626. Cardamine silvatica Link. 
Ditch near Soldiers' Home. 
62c. Cardamine Pennsylvania Muhl. 
Common in swamps at Great Falls; in a creek at Forest Glen. 
63. Dentaria heterophylla Nutt, 
Common in the woods from Sandy Landing to Great Falls. 
*64. Dentaria diphylla L. 
Rocks at Glen Echo Junction. In flower first week of April. 
*68a. Sisymbrium altissimum L. 
Near Eckington, along Florida Avenue. E. L. Greene. 
71. Erysimum cheiranthoides L, 
River-shore near mouth of Scott's Run. 
72. Camelina sativa Crantz. 
Not uncommon in Brookland, along the railroad track and in vacant 
lots. 
78. Thlaspi arvense L. 
Along the road near Great Falls' Hotel; a few specimens on a lawn in 
Brookland. 
86. Viola villosa Walt. 
Very abundant in the woods at Forest Glen: not uncommon in sandy 
or gravelly soil near Terra Cotta, Soldiers' Home and Brookland. 
86a. Viola affinis Le Conte. 
Very common in shaded woods and swamps, for instance near Ecking 
ton, the Reform School, Riggs' Mill, Marshall Hall, etc, 
86b. Viola papilionacea Pursh. 
Common in deciduous forests. 
10 Holm Additions to the Flora of Washington. 
Viola emarginata Le Conte. 
Not rare in sandy soil, open woods or hill-sides, for instance near Eck. 
ington, Terra Cotta, Riggs' Mill, Sligo, etc. 
876. Viola ovata Nutt. 
Very common in sandy soil, for instance near Soldiers' Home, Hyatts- 
ville, Sandy Landing, etc. 
90. Viola striata Ait. 
Sandy Landing. 
100. Polygala ambigua Nutt. 
In sandy soil near Riggs' Mill; dry fields near Marshall Hall. 
ioo. Polygala verticillata L. 
Abundant near the Reform School; dry fields near Marshall Hall. 
*iooZ. Polygala Nuttallii T. & G. 
In thickets of Azalea and Andromeda near Terra Cotta; in flower 
second week of June. 
106. Silene nivea D. 0. 
Along West Branch near Hyattsville; woods near Surattsville. 
*i 150. Stellaria neglecta Whe. 
In the woods near Chain Bridge, Va. 
*n8. Arenaria Michauxii Hook. 
Rocks at Great Falls. G. H. Hicks. 
124. Paronychia dichotoma Nutt. 
On rocks at Great Falls, Md. 
*i29#. Hypericum densiflorum Pursh. 
Swamps in woods near Surattsville. 
I38a. Sida Napaea Cavan. 
At the south end of Long Bridge, quite common. 
145. Linum stria turn Walt, 
Meadow near Sligo. 
192. Mel i lotus officinalis Willd. 
New York avenue near the railroad station; Navy Yard. 
195^. Trifolium hybridum Savi. 
Found in many places, especially in the northeastern section. 
*I99. Trifolium minus 8m. (T. filiforme D. C. non L.) 
On grassy slopes at Marshall Hall. 
216. Desmodium ciliare D. C. 
Common near Hyattsville; Sligo. 
217. Desmodium Mary land icum Boott. 
Near Highland; along the roads near Great Falls, on the Maryland side. 
2200. Lespedeza striata L. 
Common near Great Falls, Md.; near Cabin John Bridge; along Bunker 
Hill road near Catholic University. 
221. Lespedeza Stuvei Nutt. 
Low meadow-land near Hyattsville; near Soldiers' Home. 
Additions to the Flora of Washington. 11 
225. Vicia tetrasperma Loisel. 
Meadow near Terra Cotta. 
230. Clitoria Mariana L. 
Sligo avenue and Rappley road near Takoma. 
2340. Phaseolus diversifolius Pers. 
Along Sargent road near Terra Cotta. 
234. Phaseolus perennis Walt. 
River-shore at Marshall Hall. 
257. Rubus cuneifolius Pursh. 
Fort Totten. E. L. Greene. 
*264. Potentilla reptans L. 
Near Brightwood. E. L. Greene. 
267. Alchemilla arvensis Scop. 
Along the road between Chain bridge and High Island. 
270. Poterium Canadense B. & H. 
Swamp near Hyattsville. 
285. Cratsegus parvifolia Ait. 
Sandy Landing. 
291. Chrysosplenium Americanum Schwein. 
Forest Glen; at a spring in the woods near Great Falls, Md. 
3<>4. Callitriche Austin! Engelm. 
Woods near Soldiers' Home. 
3o6. Rhexia Mariana L. 
Not uncommon in swamps between Hyattsville and Highland, near 
the Reform School; woods at Marshall Hall. 
3O7. Ammannia humilis Michx. 
Old river bottom near Hyattsville; swamps near the tow-path at Great 
Falls; common in wet places in the woods at Marshall Hall. 
316^. (Enothera pumila L. 
Dry fields near Highland. 
317. (Enothera sinuata L. 
Abundant in a low meadow near the Reform School. 
327. Hydrocotyle ranunculoides L. 
Swamp near Marshall Hall. 
332. Erigenia bulbosa Xutt. 
River shore at Great Falls, Md. 
333. Cicuta bulbifera L. 
In the canal at Great Falls. 
338. Scandix pecten veneris L. 
Seabrook, Md. Walter H. Evans. 
349. Aralia spinosa L. 
Along the Walker road between Camp Spring P. O. and Surattsville. 
351. Aralia nudicaulis L. 
Woods near Surattsville. 
12 Holm Additions to the Flora of Washington. 
35 ia. Aralia quinquefolia Decne. & Planch. 
Several fruiting specimens were found in a ravine near the mouth of 
Scott's Run, Va., first week of July, 1898. 
*356a. Cornus circinata 1'Her. 
Dodge's Mill. Conant, 1883. Reported by Dr. Walter H. Evans. 
385. Fedia Fagopyrum Torr. & Gr. 
Low thickets at Sandy Landing. 
386. Fedia radiata Michx. 
Low thickets at Marshall Hall. 
387. Dipsacus sylvestris Mill. 
Great Falls, Md. 
39 1 a. Eupatorium altissimum L. 
Terra Cotta swamp. 
*39i&. Eupatorium linearifolium Michx. 
Woods near Marshall Hall. E. L. Greene. 
399. Eupatorium ageratoides L. 
A form with cordate leaves and very large, open inflorescence occurs 
in the woods near Seven Locks and High Island. 
402. Mikania scandens L. 
Along a creek near Highland; near Arlington; near Seven Locks. 
414^. Solidago racemosa Greene. 
On the rocks at Great Falls, Md. 
426. Sericocarpus solidagineus Xees. 
Fort Totten; along Bates' road. 
450. Diplopappus umbellatus Torr. & Gr. 
Terra Cotta swamp; near Riggs' Mill. 
457. Pluchea camphorata D. C. 
Still to be found at Marshall Hall, in open places in the woods. 
458. Filago Qermanica L. 
Pastures near Marshall Hall. 
459&. Antennaria neglecta Greene. 
Very common in moist meadow lands, and has been collected in num 
erous places between Marshall Hall and Great Falls. 
*459^. Antennaria alsinoides Greene. 
Rather rare. Sand hills near Terra Cotta. E. L. Greene. Bunker 
Hill; Forest Glen; Great Falls, Md.; Marshall Hall. Only the pistillate 
plant is known of this species. 
459d. Antennaria decipiens Greene. 
Common in pine woods and Andropogon fields. Collected in many 
places between Washington and Great Falls. 
459^. Antennaria fallax Greene. 
459/. Antennaria arnoglossa Greene. 
These two species grow mostly together in dry woodlands, and pistil 
late plants have been found in many places between Washington and 
Holm Additions to the Flora of Washington. 13 
Great Falls. The staminate plants appear to be rare, those of A. fallax 
being recorded only from Brookland, Terra Cotta and Forest Glen, while 
the male plant of A. arnoglossa has been found on Bunker Hill and at 
Sandy Landing. 
461. Gnaphalium uliginosum L. 
Old river bottom near Hyattsville; wet places in the woods at Marshall 
Hall. 
473. Eclipta procumbens Michx. 
Common along the canal at Great Falls; swamp near Marshall Hall; 
on the Potomac shore near Aqueduct bridge, Virginia side; Brookland. 
475. Rudbeckia triloba L. 
On the river shore at Seven locks; woods near Great Falls, Md.; Chevy 
Chase. 
479. Helianthus angustifolius L. 
Swamp between Nork and Fort Myer. 
492. Coreopsis tripteris L. 
Rocks at Great Falls, Md. ; woods at Seven locks. 
*462. Coreopsis bidentoides Xutt. 
In the canal near Sandy Landing. 
4 94 a. Bidens connata Muhl. 
Old river bottom near Hyattsville; not uncommon in swamps around 
Eckington and Brookland with the var. comosa Gr. 
*494&. Bidens vulgata Greene. 
Near Terra Cotta. E. L. Greene. Several places in Brookland and 
near Eckington. 
*4$6b. Bidens lugens Greene. 
River bottom near Marshall Hall; abundant in swamps near Anacostia. 
E. L. Greene. 
497#. Qalinsoga parviflora Cavan. 
Eckington near R street. 
5O2c. Artemisia vulgaris L. 
A single specimen was found in a dry field near Hyattsville. 
503. Arnica nudicaulis Ell. 
Woods between Eckington and Michigan avenue. E. L. Greene. 
Forest Glen. 
*526. Taraxacum corniculatum Kit. (T. erythroxpermum Andrz.). 
In sandy or gravelly soil, not uncommon in woods near Soldiers' Home; 
it occurs also in lawns, Brookland and Catholic University. 
*536a. Sonchus arvensis L. 
Lawns at Catholic University. 
*536&. Leontodon antumnalis L. 
With the preceding. 
551. Qaultheria procumbens L. 
Wooded hill-sides at Sligo avenue and Rappley road near Takoma. 
14 Holm Additions to the Flora of Washington . 
558. Rhododendron viscosum Torr., var. glaucum Gr. 
559. Rhododendron vicosum Torr. var. nitidum Gr. 
Abundant in the woods near Porestville and Surattsville. 
565. Pyrola chlorantha Sw. 
Pine woods near mouth of Scott's Run, Va. ; ravines at Sligo avenue. 
570. Dodecatheon Meadia L. 
Glen Echo junction. 
572. Steironema lanceolatum Gr. 
Ditch near Marshall Hall. 
576. Lysimachia stricta Ait. 
Meadow near Hyattsville. 
577. Lysimachia nummularia L. 
Along Harewood avenue near Soldiers' Home. 
577. Centunculus minimus L. 
Old river bottom near Hyattsville, in fruit last week of June. 
578. Anagallis arvensis L. 
Pastures near Marshall Hall; lawns at Catholic University. 
5856. Apocynum medium Greene. 
River shore at Marshall Hall. E. L. Greene. 
589. Asclepias rubra L. 
Deanwood swamp. Thos. H. Kearney, Jr. 
596. Asclepias quadrifolia Jacq. 
Near Fort Totten. E. L. Greene. 
*6oib. Polypremum procumbens L. 
A single specimen was found on the road-side in the woods near Mar 
shall Hall. E. L. Greene. In fruit second week of August. 
606. Bartania tenella Muhl. 
Deanwood swamp. Thos. H. Kearney, Jr. 
6i4. Hydrophyllum Canadense L. 
Ravine noar mouth of Scott's run, Va.; damp, shaded places among 
rooks near Sandy Landing. 
615. Ellisla Nyctelea L. 
Abundant along the tow-path near Great Falls. 
634. Iponiaea lacunosa L. 
Arlington estate; on rocks at Great Falls, Md. 
636. Convolvulus sepium L. var. Americanus Sims. 
Low grounds on Bunker-hill road. 
637. Convolvulus arvensis L. 
Vacant lots on First street near N. Y. avenue; Navy Yard. 
646. Lycium vulgare Dun. 
Along the road near Henson's Creek. 
653. Linaria Elatine Mill. 
Grassy slopes at Marshall Hall; along Brentwood road near Brookland. 
Holm Additions to the Flora of Washington. 15 
654. Scrophularia nodosa L. 
Along the tow-path near Great Falls; ditch near Hyattsville; Marshall 
Hall. 
663. Hysanthes gratioloides Benth. 
Not common; old river bottom near Hyattsville; swamp near Hen- 
son's Creek. 
*663#. Hysanthes attenuata (Muhl.) Small. 
Common along creeks. 
667. Veronica scutellata L. 
Muddy creek bottom near Marshall Hall. 
669^. Veronica agrestis L. 
Lawns of the Catholic University. 
*699&. Veronica Chamaedrys L. 
Near Soldiers' Home. 
672. Buchnera Americana L. 
Club-house woods near Great Falls, Md. 
*677. Qerardia decemloba Greene. 
Low grounds in Brookland near Bunker Hill; swamp near the Reform 
School; in bloom second week of September. 
*677^. Qerardia Holmiana Greene. 
Wooded banks along Michigan avenue, opposite Soldiers' Home 
grounds; Brookland; Terra Cotta; in bloom second week of October. 
*68o. Melampyrum latifolium Muhl. 
In sandy soil in woods near Riggs' Mill. 
680. Melampyrum Americanum Michx. 
Ravines near Sligo avenue and Rappley road near Takoma. 
*686. Utricularia subulata L. 
Swamps in the woods near Surattsville. G. W. Oliver. In flower first 
week of September. 
712. Pycnanthemum lanceolatum Pursh. 
Terra Cotta. 
*723. Monarda clinopodia L. 
Ravine near mouth of Scott's Run, Va. In flower first week of July. 
732. Scutellaria parvula Michx. 
Woods at northeast corner of Soldier's Home grounds; near Marshall 
Hall. 
738^. Lamium purpureum L. 
Capitol grounds. E. L. Greene. 
745. Plantago Patagonica Jacq. var. aristata Gray. 
Common near Hyattsville and many other places in the District. 
*748rt, Amaranthus chlorostachys Willd. 
Near the Navy Yard, with flowers second week of July. 
749. Amaranthus albus L. 
Along the railroad track near University Station; gardens in Brook- 
land. 
16 Holm Additions to the Flora of Washington. 
768. Polygonum hydropiperoides Michx. 
Old creek-bottom near Marshall Hall. 
*778. Polygonum cristatum Engelm. 
Rocks near Great Falls, Md.; thickets near Hyattsville; common near 
Seven Locks. With flower and fruit third week of September. 
788. Aristolochia Serpentaria L. 
Abundant in ravines near Marshall Hall; ravines at Sligo avenue and 
Rappley road near Takoma. 
796^. Euphorbia hirsuta Wieg. 
Rocks at Great Falls, Md.; woods near Marshall Hall. 
800. Euphorbia commutata Eng. 
Common in rocky woods from Sandy Landing to Great Falls. 
801. Phyllanthus Carolinensis Walt. 
Old river bottom near Hyattsville; not uncommon in the woods at 
Great Falls, Md. ; woods near Marshall Hall. 
812. Urtica dioica L. 
Not common. Along the tow-path near Great Falls. 
830. Corylus Americana Walt. 
Abundant near Sligo; South Brookland near the railroad track. 
849. Quercus heterophylla Michx. 
Several trees, but all sterile, were found in the woods at Marshall Hall. 
901. Habenaria tridentata Hook. 
Woods near Great Falls, Md.; very abundant in swamps near Suratts- 
ville. 
903. Habenaria ciliaris R. Br. 
Swamp near Bladensburg turnpike, south of the Reform School. G. 
W. Oliver. 
904. Habenaria lacera R. Br. 
Swamp near the Reform School; several places in Brookland; Terra 
Cotta swamp; swamps near Marshall Hall. 
909. Spiranthes gracilis Big. 
Woods along Scott's Run, Va. 
910. Spiranthes simplex Gr. 
Woods near Great Falls, Md.; Terra Cotta; Brookland. 
912. Pogonia verticillata Nutt. 
Swamp near Bladensburg. Thos. H. Kearney, Jr. Abundant on the 
sand hills around Fort Totten; damp woods near the Reform School; 
swamps near Surrattsville. 
913. Calopogon pulchellus R. Br. 
Deanwood swamp. Thos. H. Kearney, Jr. Swamp near Surattsville. 
915. Microstylis ophioglossoides Nutt. 
Woods near Marshall Hall: woods near Great Falls, Md. 
Additions to the Flora of Washington. 17 
925. Aletris farinosa L. 
Fort Totten. E. L. Greene. Very common in the open woods south 
of the Reform School. 
939. Allium tricoccum Ait. 
Rocks at Great Falls, Md. 
947. Majanthemum Canadanse Dasf. 
Near the Reform School. G. W. Oliver. Abundant in the woods at 
Surattsville. 
957. Veratrum viride Ait. 
Woods near Surattsville. 
962. Muscari botryoides Mill. 
Racks at Sandy Landing. 
970. Juncus bufonius L. 
Apparently not rare and found in several places; near Kenilworth: 
Bladensburg; Highland; Riggs' Mill; Takoma; Brookland; Marshall 
Hall. 
982. Commelina hirtella Yahl. 
River shore at Marshall Hall; Four Mile Run. 
982^. Commelina Virginica L. 
Rocks at Great Falls, Md. 
985. Xyris flexuosa Muhl. 
Swamp south of the Reform School; the Lydecker basin. 
986. Eriocaulon decangulare L. 
Swamps near Surattsville. 
986?. Cyperus flavescens L. 
Evidently common and found in many places, for instance: Terra 
Gotta swamp; along creeks on Bunker Hill road; at a spring on Arling 
ton estate; abundant in swamp between Nork and Fort Myer; near 
Alexandria. 
987. Cyperus diandrus Torr. 
The specimens recorded in Professor Ward's List do not belong to this 
species, but to C. rwularis Kunth. 
*987. Cyperus rivularis Kth. var. eluta Clarke. 
With the type and equally common. 
990. Cyperus erythrorhizos Muhl. 
At a spring on Arlington estate; swamp near Marshall Hall. 
991. Cyperus calcaratus Nees. 
Swamps near the canal at Great Falls. 
999. Kyllinga pumila Michx. 
Several places near Marshall Hall, in the woods. 
1000. Fuirena squarrosa Michx. 
Abundant in the Lydecker basin. 
ioo3. Eleocharis olivacea Torr. 
The Lydecker basin. 
18 Holm Additions to the Flora of Washington. 
10040. Eleocharis intermedia Schult, 
Wet places along Rappley road near Takoma; exceedingly common in 
swamps near Marshall Hall. 
1007. Scirpus planifolius Muhl. 
Common on the sand hills around Fort Totten; Forest Glen. 
1010. Scirpus debilis Pursh. 
Along Bunker Hill road. 
*ioi8a. Fimbristylis laxa Vahl. 
Abundant in low meadow-land near Hyattsville. In flower second 
week of August. 
1019. Fimbristylis capillaris Gr. 
On dry rocks at Great Falls, Md. 
1 01 pa. Rynchospora fusca R. & S. 
Swamp between Nork and Fort Myer. 
*iO2o. Rynchospora gracilenta Gr. 
Swamps near Surattsville. 
*iO2o&. Rynchospora cymosa Ell. 
Swamps south of the Reform School. 
iO2i. Rynchospora cephalantha Gr. 
Along Queen's Chapel road; Lydecker basin; Arlington estate; Terra 
Cotta swamp. 
10216. Rynchospora macrostachya Torr. 
Swamp in the woods at Marshall Hall. 
1024. Scleria pauciflora Muhl. 
Swamp south of the Reform School. 
iO24. Scleria reticularis Michx. 
Deanwood swamp. Thos. H. Kearney, Jr. Swamp between Nork 
and Fort Myer; near Surattsville. 
1026. Carex Willdenovii Schk. 
Common in the woods at Marshall Hall; Sandy Landing; Great Falls, 
Md. 
1027. Carex Steudelii Kth. 
Sandy Landing; Great Falls, Md. 
1035^. Carex Muhlenbergii Schk. var. enervis Boott. 
In dry, sandy soil near Terra Cotta; dry fields at Marshall Hall. 
*iO38rt. Carex stellulata L. var. cephalantha Bail. 
Terra Cotta swamp. 
1051. Carex Shortiana Dew. 
Near the river shore at Marshall Hall. 
1054. Carex granularis Muhl. 
Not common. Along the canal at Great Falls. 
1055. Carex glaucodea Port. 
Near Hyattsville; Fort Totten; very common in the woods at Marshall 
Hall. 
Addition* t<> tin- Flow of Washington. 19 
ios8<i. Carex grisea Wahlbg. var. angustifolia Boott. 
The Zoological Park. 
1064. Carex Careyana Torr. 
High Island. 
1065. Carex laxicultnis Schw. (C. retrocurva Dew.) 
Woods near Great Falls, Md. 
1068. Carex laxiflora Lam. var. styloflexa Boott. 
Terra Cotta swamp. 
*i072f. Carex laxiflora Lam. var. varians Bail. 
Bunker Hill; the Smithsonian Park; the Virginia shore near Aqueduct 
bridge. 
1075. Carex umbellata Schk. 
Exceedingly common on the sand hills around Terra Cotta and Fort 
Totten; Sandy Landing. 
1077. Carex nigro-marginata Schw. 
Grassy banks along Rappley road near Sligo; Bunker Hill; on rocks 
at Great Falls near the canal. 
1 08 1. Carex prasina Vahl. 
Forest Glen. 
*iop2a. Carex typhinoides Schwein. 
Low thickets near Hyattsville. 
HOI. Vilfa aspera Beauv. 
Rocks at Great Falls, Md. 
noia. Vilfa vaginaeflora Vasey. 
Common in the city, in lawns, vacant lots, etc.; along roads near 
Hyattsville, Highlands, Great Falls, etc. 
no4. Agrostis elata Trin. 
Evidently common in woods, and has been found in many localities 
besides those already recorded: near Chevy Chase; Cabin John; Great 
Falls, Md., etc. 
1 1 1 2. Muhlenbergia capil laris Kth. 
Very abundant forming large patches on the rocks at Great Falls, Md, 
October, 1899. 
1119. Aristida purpurascens Poir. 
On dry rocks at Great Falls, Md.; near Hyattsville. 
*ii24. Tricuspis seslerioides Torr. var. pallida Holm, n. var. 
A form with pale green spikelets; with the type near Marshall Hall, 
ii25. Eaton ia obtusata Gr. 
Low grounds near the Reform School. 
ii2(>'/. Eatonia Dudleyi Vasey. 
In woods at Scott's run, Va. ; Sandy Landing. 
1129. Olyceria laxa Scribner. 
Still abundant in the Terra Cotta swamp (Aug., 1900). 
20 Holm Additions to the Flora of Washington. 
1130. Qlyceria fluitans R. Br.' 
Ditch near Hyattsville. 
*H3oa. Qlyceria obtusa Trin. 
Damp places in the woods near Surattsville. N 
1139. Eragrostis reptans Nees. 
Along the tow-path at Great Falls; wet places along the roads in the 
woods at Marshall Hall. 
1140. Eragrostis minor Host. (E. poceoides Beauv.) 
Along the railroad track near University Station; along the tow-path 
at Seven locks. 
1142. Eragrostis Frankii Mey. 
Along the tow-path near Great Falls; in the woods near Marshall 
Hall; vacant lots in Brookland. 
1143. Eragrostis Purshii Schrad. 
Roadsides in Brookland; near Highland; Hyattsville; very common 
near Great Falls; near Cabin John Bridge. 
1146. Festuca Myurus L. 
Woods south of the Reform School; along the railroad track at La- 
mond station. 
1156. Bromus sterilis L. 
Brookland; New York avenue near Eckington. 
1158. Uniola gracilis Michx. 
Arlington estate; Takoma. 
n66. Danthonia sericea Nutt. 
Many specimens were collected along the electric railroad track near 
Highland. 
1169. Aira caryophyllea L. 
Common along the road between Chain Bridge and Scott's Run, Ya.; 
in dry fields near Surattsville; near the Reform School. 
1178. Panicum agrostoides Spreng. 
Swamp near Marshall Hall. 
^*ii8oZ>. Panicum Philadelphicum Bernh. (P. capillare L. var. flexile 
Gatt.) 
Along Rappley road near Glen Sligo. In flower first week of October. 
n83. Panicum commutatum Sclmlt. 
Soldiers' Home grounds; Forest Glen; High Island; Sandy Landing; 
Takoma. 
1185. Panicum microcarpon Muhl. 
Evidently common in open woods, and has been collected in several 
places between Washington and Great Falls on the Maryland side. 
1187. Panicum laxiflorum Lam. (P. pauciflorum Ell. in Prof. Ward's 
list.) 
The commonest species of Panicum in the woods at Great Falls, Md. 
Holm Additions to the Flora of Washington. 21 
1187*7. Panicum sphaerocarpon Ell. 
Woods near Riggs' Mill; Terra Cotta swamp; Chevy Chase; dry fields 
near Hyattsville and the Reform School. 
u88a. Panicum ramulosum Michx. 
Terra Cotta swamp. 
n88&. Panicum nitidum Lam. 
Old river bottom near Hyattsville; Terra Cotta swamp. 
uSSc. Panicum lanuginosum Ell. 
Woods at Forest Glen; Fort Totten. 
*i 189*2. Panicum linearifolium Scribn. 
Plummer's Island. Thos. H. Kearney, Jr. 
1192. Panicum Crus-galli L. var. hispidum Gr. 
In the canal at Great Falls. 
1196. Cenchrus tribuloides L. 
Near Seven locks: along roads at Marshall Hall. 
1203. Andropogon macrourus Michx. 
Sphagnum swamps near Surattsville. 
1 220. Woodwardia Virginica Sm. 
Common near Surattsville. Wm. R. Maxon. 
*i222. Asplenium pinnatifidum Nutt. 
Two miles below Scott's Run on Virginia shore of Potomac. Wm. 
Palmer and Wm. R. Maxon. 
*i222i. Asplenium ebenosdes R. R. Scott. 
Plummer's Island. Wm. Palmer. A single specimen. 
1223. Asplenium angustifolium Michx. 
Ravines between Marshall Hall and the Piscataway; western end of 
Massachusetts avenue bridge and Rock Creek. Wm. Palmer. Abund 
ant along brooks in woodlands of the Potomac bluffs near Langley, Va. 
Wm. R. Maxon. 
1226. Camptosorus rhizophyllus Link. 
Plummer's Island. D. LeRoy Topping. Several situations on rocky 
cliffs of the Virginia shore of the Potomac opposite Langley. Wm. R. 
Maxon. 
1230. Aspidium cristatum Swtz. 
In the Lygodium swamp about two miles to the northwest of River- 
dale, Md. Wm. Palmer and Wm. R. Maxon. Woods near Great Falls, 
Md. ; near the spring-house, Takoma. 
1236. Cystopteris fragilis Bernh. 
Common in ravines north of Marshall Hall; Potomac Landing, Alex 
andria County, Va. Wm. Palmer. Near Sandy Landing. 
*i236. Cystopteris bulbifera (L.) Bernh. 
On the Virginia shore of Potomac nearly opposite Langley, Va. Wm. 
Palmer and Wm. R. Maxon. Recorded in Flora Columbiana, Field and 
Forest, Vol. I, 1875, but with no locality. 
22 Holm Additions to the Flora of Washington. 
Onoclea Struthiopteris (L.) Hoffm. 
Frequent along the alluvial portions of the Potomac on the Virginia 
side one to two miles above Cabin Johns. Several collectors. 
1242. Osmunda Clay toniana L. 
Between West Chevy Chase and Glen Echo Junction. Wm. R. 
Maxon. 
1245. Botrychium ternatum Swtz. var. dissectum Milde. 
Woods near Great Falls, Md. 
1247. Ophioglossum vulgatum L. 
Grassy roadside bank, Upper Marlboro, Md. Wm. R. Maxon. Woods 
at Marshall Hall; at the foot of Fort Totten. 
1248. Lycopodium lucidulum Michx. 
In dry woods near Cleveland Park. Wm. R. Maxon and C. L. Pol 
lard. Ravines near Marshall Hall. 
1249. Lycopodium dendroideum Michx. 
Woods near Surattsville. 
1253. Selaginella apus Spring. 
Has been found in many places between Marshall Hall and Great 
Falls, Md., and is evidently not uncommon.