familyApocynaceae
genusAsclepias
speciesAsclepias cryptoceras
subspeciesAsclepias cryptoceras subsp. davisii
Asclepias cryptoceras subsp. davisii
Ann. Missouri Bot. Gard. 41: 180. 1954.
Common names: Humboldt Mountains or pallid or Davis’s or jewel milkweed
IllustratedEndemic
Basionym: Asclepias davisii Woodson Ann. Missouri Bot. Gard. 26: 261, fig. 1. 1939
Synonyms: A. cryptoceras var. davisii (Woodson) W. H. Baker
Treatment appears in FNA Volume 14.
Revision as of 22:32, 6 October 2024 by imported>Volume Importer
Leaves: petiole 2–8 mm; blade oval to ovate or obovate or orbiculate, 3–7 × 1.8–4.8 cm, apex rounded to acute, venation eucamptodromous, surfaces glabrous. Inflorescences 3–8-flowered. Pedicels 16–25 mm. Flowers: calyx lobes 5–6 mm; corolla lobes 8–11 mm; fused anthers dark brown, green at apex, 1.8–2.5 mm; corona segments pinkish purple, 5–6(–7) mm, apices (including recurved tooth) exceeded by or equaling style apices.
Phenology: Flowering Apr–Jul; fruiting May–Jul.
Habitat: Slopes, hills, arroyos, basalt, silicic tuff, limestone, chert, serpentine, gravel, sand and clay soils, juniper woodlands, shrubby grasslands, steppe.
Elevation: 300–1500(–2100) m.
Distribution
Calif., Idaho, Nev., Oreg., Wash.
Discussion
Subspecies davisii just enters Washington in Asotin County and is exceedingly rare in the state, where it is considered to be of conservation concern.
Selected References
None.
Lower Taxa
None.
... more about "Asclepias cryptoceras subsp. davisii"
Humboldt Mountains or pallid or Davis’s or jewel milkweed +
Slopes, hills, arroyos, basalt, silicic tuff, limestone, chert, serpentine, gravel, sand and clay soils, juniper woodlands, shrubby grasslands, steppe. +
Ann. Missouri Bot. Gard. +
1954 +
Asclepias cryptoceras subsp. davisii +
Asclepias cryptoceras +
subspecies +