Contributions to Western Botany 45 
at all points. From eastern Colorado southward to eastern 
Arizona. Common. 
2A. Ovary not lobed; wings consisting of a single blade, ab- 
sent in A. alpina. 
24B. Wings wider above than below (narrowedaborve alsoin 
A. umbellata var. alba), generally reduced to a vestige at 
the base of fruit, never produced below it; seeds like those 
of section A. 
2A4BC. Perennials, prostrate. 
6. A. mellifera Dougl. Bot. Mag. t 2879. Very widely 
spreading and slender, in tufts, often four feet in diameter; flow- 
ers white; bracts of the inyolucre scarious, 3-6” long; fruit wings 
often much elongated laterally and wider than the fruit; leaves 
ovate to oblong-lanceolate, truncate to cuneate at base, on slen- 
der petioles; seed nearly linear, otherwise asin A. villosa. Grows 
in the Juniper Zone of southern Oregon and western Nevada. 
7. A. umbellata Lam. Ill. t 5. Involucral bracts narrowly 
lanceolate, not over 3” long; flowers rose-colored; wings as in 
the above, inner coat that of A. gracilis; seed the same. Common 
along the Southern Pacific sea-coast only. 
8. Var. alba (Eastwood Proc. Cal. Acad. 3 1 97.) Closely 
resembles the above but has the wings widest in the middle or a 
little below the middle and rudimentary at tip and base, South- 
ern Pacific sea-coast. 
9. A.alpina Brandegei Bot. Gaz.27 456. Forming mats 15’ 
in diameter, viscid-pubescent; leaves nearly orbicular, 14-24” 
wide, petioles 5-74” long; peduncles 24-3” long; bracts 4-5, nar- 
rowly ovate-acuminate, 1-14” long; flowers 5, rose-colored to 
white, 6-74” long, 4-5” wide; fruit 14-2” long, narrowed at both 
ends, thin-coriaceous, obtusely to acutely 5-angled, glabrous, 
tuberculate veined, not winged. Probably is a depauperate 
form of A. umbellata. Monatchy meadows, Mt. Whitney, Cal., 
