476 ASCLEPIADACE^E. Asclepias. 



slender-fusiform, smooth. — DC. Prodr. viii. 569; Watson, Bot. King Exp. 282. 

 A. macrophylla, Nutt. PL Gamb. 180. 



Hillsides, &c. , throughout the State, extending northward and eastward into Oregon and Nevada. 



-s- -f- Hoods broad and ventricose or saccate, truncate or notched at the broad summit, 

 mostly including the strongly incurved-uncinate horn, which rises from, near the sum- 

 mit : leaves broad and proportionally large : flowers rather large : corolla greenish- 

 or yellowish-white : the hoods usually flesh-colored. 



++ Glabrous throughout, low : leaves 3 or 4 pairs : hoods saccate, open only at top. 



4. A. cryptoceras, S. Watson. Stems decumbent, a span to a foot high, sim- 

 ple : leaves opposite, broadly ovate or orbicular, an inch or two long, very short 

 petioled : umbels nearly sessile, few-flowered : lobes of the corolla oblong-ovate, 

 nearly half an inch long : saccate hoods sessile (a quarter of an inch long), 2-cleft at 

 the summit, each lobe anteriorly abruptly subulate-pointed, the slender sickle-shaped 

 horn included. — Bot. King Exp. 283, t. 28. Acerates latifolia, Torr. in Fremont 

 Eep. 317. 



Mountains near Humboldt Lake, Nevada, Watson. May therefore he expected on the eastern 

 borders of California. Extends to Utah and Idaho, Nuttall, Fremont. 



+-5- +-i- White-woolly, even to the outside of the corolla in bud, but the wool sometimes 

 deciduous with age, leafy : lobes of the corolla oblong-ovate, about 3 lines, and the 

 hoods 2 lines long, the latter open down the inner side : ovaries glabrous, bid the 

 young follicles tomentose. 



5. A. vestita, Hook. & Arn. Stem a span to 2 feet high, stout, simple : leaves 

 opposite, ovate-lanceolate or oblong-lanceolate, almost sessile (3 to 6 inches long), all 

 but the lower gradually acuminate, the base of the upper often cordate : umbels 

 almost sessile, many-flowered : hoods slightly raised on the short filament-sheath, 

 obliquely truncate, so as to be broadly rhombic when outspread and the lateral 

 angles acute, a broadly triangular or vomer-shaped ascending crest rather than horn 

 attached to nearly the whole length of the hood and not exceeding it. — Bot. 

 Beechey, 363 (not Hook. Bot. Mag. t. 4106); Engelm. in Am. Nat. ix. 349. 

 A. eriocarpa, Torr. in Pacif. P. Pep. iv. 128, not of Benth. 



From near San Francisco and Monterey to the foot-hills of the Sierra Nevada. In one or two 

 of the hoods the crest or horn has been found nearly wanting. Follicles ovate, minutely tomen- 

 tose-pubescent. 



6. A. eriocarpa, Benth. Stem 2 or 3 feet high, often sharply angled : leaves 

 not rarely 3 or 4 in a whorl, and the upper occasionally alternate, oblong-lanceolate 

 or oblong, acute (4 to 7 inches long) : peduncles of the many-flowered 'umbels an 

 inch or two long, equalling or exceeding the pedicels : hoods rather conspicuously 

 elevated, broader than high, ventricose, the truncate upper portion emarginate at the 

 back, much extended inward horizontally, and enclosing the horizontally produced 

 vomer-shaped crest rather than horn. — PL Hartw. 323 ; Engelm. 1. c. 



Dry hills, from Monterey (Hartweg) to Owen's Valley (Dr. Horn), and behind San Diego, 

 Cleveland, Palmer. Flowers commonly larger than in the foregoing : the horizontal crest twice 

 longer than high, conformed in shape to the upper part of the hood, which merely encloses it. 



7. A. leucophylla, Engelm. Stem 2 to 4 feet high : leaves as in A. vestita, 

 but closely sessile : peduncles of the many-flowered umbels longer than the pedicels, 

 as in A. eriocarpa : hoods erect, much narrower, oblong (or when outspread obovate) 

 with rounded entire summit ; the falcate or claw-shaped horn attached below the 

 middle, ascending and incurving over the stigma, longer than the hood. — Am. 

 Nat. ix. 349. 



Southeastern borders of the State ; Providence Mountains (Dr. Cooper) and southward (Dr. 

 Palmer) ; thence to S. Utah, Parry. Woolliuess fine and white, but deciduous, as in A. vestita. 

 Dr. Palmer's specimens are green and glabrate. Corolla greenish ; the hoods yellowish. 



