Vol. 48, pp. 169-174 November 15, 1935 PROCEEDINGS iiH lrji»//7Jrr!^^^>\ or THK '^ BIOLOGICAL SOCIETY OF WASHINGTON FIVE NEW PLANTS OF THE GENUS APLOPAPPUS. BY S. F. BLAKE. The new forms of Aplopappus here described have been found in the course of recent work on material of that genus in the United States National Herbarium and on specimens borrowed from the Dudley Herbarium of Stanford University. Aplopappus wigginsii Blake, sp. no v. Annuus parvus basi rainosus decumbens, ramis strigosis foliosis; folia parva inferiora pinnatisecta (lobis 3-5) petiolata cetera linearia Integra apice albo-setosa strigosa vel laxius hirsuto-pilosa; capitula mediocria apice ramorum et ramulorum paucorum solitaria vix pedunculata radiata flava; involucri depresso-hemisphaerici 4-5-seriati gradati 4-5 mm. alti appressi phyllaria exteriora anguste linearia strigosa et parum glandulosa apice setosa medio herbacea margine anguste subscariosa, interiora subduplo latiora acuminata stipitato-glandulosa supra medium subherbacea; radii 12-15; achenia pilosa, ea disci anguste obovoidea compressa substipitata; pappus corolla disci quarta parte brevior; appendices ramorum styli anguste triangulari-subulatae lineis stigmatiferis subtriplo longiores. Slender depressed annual, somewhat yellowish-green, without obvious main stem, several-branched within about 1 cm. of the base, the branches 3-9 cm. long, simple or few-branched, green or purplish; leaves alternate, the internodes 2-4 mm. long; lower leaves 8-13 mm. long, strigose or more loosely hirsute-pilose chiefly on the lower surface, the blades shorter than petiole, pinnately 3-5-parted, the lobes 2-4 mm. long, 0.5-1 mm. wide, each tipped with a white bristle 0.5-0.8 mm. long; other leaves linear, entire, sessile, 3-8 mm. long, 0.5-O.S mm. wide, similarly pubescent, not setose-ciliate, tipped with a white seta 0.5 mm. long or less; heads solitary at tips of branches and branchlets, not obviously peduncled, 1.5-1.8 cm. wide (as pressed); disk (as pressed) 5-6 mm. high, 7-9 mm. thick; outer phyllaries linear, acute, 2.5-3 mm. long, 0.4-0.6 mm. wide, tipped with a bristle 0.3 mm. long or less, subherbaceous along midline with narrow subscarious margin or sometimes subherbaceous essentially throughout except for the subchartaceous whitish base, sometimes with small apical purplish spot, 1-vittate, the inner broader (0.8-1 mm. wide), often with 33— Proc. Biol. Soc. Wash., Vol. 48, 1935. (169)
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