JOHNSTON. STI DIES IN THE BORAGINACEAE.. X\I STUDIES IN THE BORAGINACEAE, XVI SPECIES CHIEFLY FROM MEXICO AND WESTERN UNITED STATES IVAN i\1. JOHNSTON(ordia coyucana, sp. nov. Frutex 3 m. altus ramosus; foliis 4-7 cm. longis 1.5-3 cm. latis 3-5 mm.longe petiolatis saepe infra medium latioribus. apice acutis. basi acutisobtusisve, margine in tertiam partim inferiorem integris alibi evi-denter dentatis (dentibus 0.3-1 mm. altis), supra viridibus subvelutinispilos majores gracilis mollis 1-2 mm. longos ascendentis basi incrassatos etpilos perinconspicuos minutos basi conico-incrassatos gerentibus, subtusgriseis tenuiter tomentosis evidenter costatis et nervatis; inflorescentiacapitato-congesta in ambitu elliptica densissima ca. 50-fora maturitate10-13 mm. crassa 15-25 mm. longa: pedunculo 3-4 cm. longo extra-axillarie latere caulis erumpenti; calvce ad anthesin 4-5 mm. alto hispidulo. lobistriangularibus 1 mm. longis 1-2 mm. latis acutis nullo modo appendiculatis;corolla alba 6 mm. longa extus glabra intus in tubo villulosa. limbo ad 5mm. diametro. lobis ca. 2 mm. longis et latis apice emarginatis marginecrispatis; filamentis ca. 3 mm. supra basim corollae affixis ca. 2 mm. longis. GrriR iRno: Covuca, shrub 3 m. tall, on hill, 1935, Hinton 8156 (TYPE, Gray Herb.). A very well marked species of the Section Varronia. It is readily dis-tinguished from all known species by the following combination of char-acters: large very dense ellipsoidal capitate-congested pedunculate in-florescence, indument of simple (non-stellate) hairs, unappendaged calyx-lobes, and small corollas. None of its congeners in :Mexico or CentralAmerica seem closely related to it.Cordia passa, sp. nov. Planta laxa suffruticosa; ramis fruticosis gracilibus. juventate foliosissimplicibus 5-15 cm. longis 1-1.5 mm. crassis ascendentibus e caudiceramos procumbentis efoliatos composito erumpentibus; foliis 3-10 mm.distantibus 2-15 mm. longe petiolatis; lamina 15-55 mm. longa 5-30 mm.lata infra medium latiore, basi obtusa vel acuta, apice acuta, margineutroque conspicue 5-8-dentata. subtus grisea (pilis 0.2-0.7 mm. longis ebasi pustulata inconspicua. erumpentibus donata) utroque latere costaenerviis evidentibus ca. 5 donata, supra viridi hispidula (pilis ascendentibusad 0.5 mm. longis e basi pustulata inconspicua erumpentibus donata); pe-dunculo extra-axillari 0.5-3 vel rariter ad 7 cm. longo; intlorescentia capi-tata densa 10-25-flora corollis exclusis 0.8-1.2 cm. diametro: calyce subanthesi ad 5 mm. longo. lobis 2.5-3 mm. longis 1.2-1.5 mm. latis sparsehispidulis e basi sursum gradatim attenuatis apice viridibus subliberis;corolla alba infundibuliformi 2.5-2.8 cm. longa, limbo ad 2 cm. diametro,tubo parte inferiore 1 cm. longo 1-1.5 mm. crasso deinde sursum gradatimampliato, lobis emarginatis ca. 8 mm. latis et 4 mm. longis; filamentis ad5 mm. longis, antheris ad 1 mm. longis.* No. XV in this series was published in this Journal, 21: 33. -355. 1940.1948 1
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