W ATSON—Plants of Bernalillo County 
A. HESPERIUS. (Western Aster.) Tall, 3-8 ft. from 
nearly glabrous and smooth to scrabrous-pubescent ; 
leaves lanceolate, entire, or the larger with a few teeth, 
2-5 in. long, about 1-2 in. wide, sessile but not cordate 
or auriculate; heads rather crowded, 4-5 lines high; 
rays white or violet, 1-2 to 1-4 in. long. In the valley. 
#2. tantHE. Pappus somewhat double, outer 
shorter; wvolucral bracts well imbricated, 
appressed, without herbaceous tips; rays vic- 
let, achenes narrow, villous; leaves numerous 
rigid, small linear, 1-nerved and veinless. 
A.  ERICAEFOLIUS, Rothrock. Low canescent or 
rough-haired, much branched, branches erect or dif- 
fuse, terminated by somewhat pedunculate small and 
narrow heads 1-4 to 1-3 in. high) ; leaves erect or little 
spreading 1-4 to 1-3 in. long; leaves spatulate, upper 
linear or nearly filiform; involucral bracts lanceolate, 
acute or apiculate, thinnish. Quite common on the 
Mesa as early as April. 
*3 orTuomERIs. Pappus simple; involucral 
bracts imbricated, appressed, no herbaceous 
tips, often scartous-edged or dry; involucre 
and herbage smooth and glabrous, woody. 
A. spinosus. Benth. Base of stem usually woody, 
sending up slender and lithe striate green branches, 
2-4 ft. long, branching paniculately and terminated by 
small heads; stem leaves small, more or less fleshy, 
linear or spatulate-lanceolate, entire, mostly few and 
fugacious, somle of them with soft subulate spines in or 
above their axils, those of the branchlets reduced to sub- 
ulate scales or wanting; involucre 1-6 in. high, of sub- 
ulate lanceolate bracts. Quite common in the sandy 
fields in the valley. Not so common on the Mesa. 
Natori #4. MACHAERANTHERA. Involucre imbricated 
m many rows; the bracts lear, coriaceous, 
with foliaceous spreading tips; the rays 
numerous and conspicuous, violet or bluish- 
purple; pappus copious simple, of rather 
rigid and unequal bristles; leafy-stemmed 
and branching, the showy heads terminating 
the branches, the involucre canescent or even 
viscid. 
*Involucre densely hispidulous as well as viscid 
very squarrose, achenes glabrous or glabrate ; 
leaves from incisely dentate, to entire, the 
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