Contributions to Western Botany. ol 
over 6’ high; perennials with straight stems. The species of this 
genus are based on too variable characters to be of much value. 
A. Stems glaucous, except in A. linearifolia; leaves linear, 
fruit pubescent. 
1. A. Bodini (Holzinger Cont. Nat. Herb. 1 287 pl. 21.) Mo- 
rong Mem. Torr.Club5 355. Low plants,2-5’ high, not more than 
minutely pubescent; diftusely branched, slender branches diver- 
gent; leaves narrowly linear, sessile, }- 14’ long, 1” wide or less, 
slightly narrowed at both ends, fleshy; involuere single, short- 
pedunculate in upper axils, finely pubescent, about 3” wide when 
mature, 5-lobed about to middlé; lobes ovate-oblong, acute; fruit 
narrowly obovuid, obtusely 5-ribbed, very pubescent, 23” long. 
Juniper Zone or Lower Oak of eastern Colorado, also Pueblo. 
A. Bushii Britton Bull. Torr. Club 22 223 seems to be the same, 
With stalked involucres. This grows in Missouri. 
2 A. linearis Pursh Fi. 728. Slender and glaucous plants, 
except the pubescent coma se involucres; aged steed, 
bushy and tufted, 2-3°h 
of 45 degrees; leaves eee to broadly linea: tontlaey, generally 
elongated; fruit ribs 5-7, smooth, fruit scarcely tubercled; base of 
flower hemispherical to 1” above base, then rotate-campanulate, 
lobes oblong-ovate, 2” long, wavy or erose, obtuse; stamens arise 
from the center of the base of flower with capillary, scarcely 
tapering filameuts 6-8” long, tips bent and twisted; anthers didy- 
mous, of 2 obliquely oblong parts which are yellow-warty as if 
glandular but are really glabrous, fixed by the middie, rather 
large, with few large pollen grains; pistil fully 14, times the fila- 
ments, capillary, coiled at least in the bud, tip a rather large, 
flattish knob, style often purplish, rest of flower white, except 
the anthers; flowers erect, outside of calyx and involucre gland- 
ular. Grows from the upper Juniper Zone southward, Iowa to 
Idaho and Utah and southward. Oxybaphus angustifolia Sweet. 

3. Var. coccinea (Torr.) Mex. Bound. 169, resembles A. 
angustifolia except that the flowers are long, nearly tubular and 
