CoCKERELL: NorTH AMERICAN SPECIES OF HymENoxys 483 
nearly to base; inner bracts very broad, strongly glandular, with 
green subulate tips which extend beyond outer; disc-corollas 
densely pubescent; pappus-scales ferruginous, subulate-tipped, 
about half length of disc-corolla ; hairs of achenes ferruginous. 
In the herbarium of the Missouri Botanical Garden is another 
sheet bearing Palmer’s number 260. On it are two specimens ; 
one only in bud and doubtful, the other in good flower and plainly 
Hf, canescens biennis. It is a smaller plant than that described 
above, the stem not branched until about 17 cm. from base, and 
there are only 14 heads, The outer bracts vary from broad to 
Narrow on the same head. Still a third sheet of Palmer’s 260 
comes from the Redfield herbarium, now belonging to the Mis- 
sourt Botanical Garden. This plant has a single stout reddened 
stem, branching about 4 dm. from base, with about 20 heads. 
The leaves are narrower than in the plant described as typical, 
and the stem is a little more scurfy. The heads agree with subsp. 
biennis ; the outer bracts are 10, perhaps varying to more. 
So far as I can see, all the above are one species; I presume 
the last described plant came from dryer ground than the type. 
At Mesilla Park, N. M., I have seen just the same sort of differ- 
ences in the cruciferous genus Sopfia, the specimens having 
Single strict little-branched stems coming from higher, dryer 
ground. 
Although A. canescens biennis was described from Arizona, it 
appears to be most abundant in Utah. 
The following Utah material belongs here : 
I. Pine Valley, 1874, Dr. C. C. Parry. Single stem about 4 
dm. high, branching about one dm. from top, with three heads on 
long naked peduncles ; foliage pale green, slightly scurfy, strongly 
punctate, the leaf-segments very narrow, not over one mm. wide, 
upper part of stem with only short inconspicuous leaves. Heads 
just like typical subsp. dzennis, bracts similar but more hairy, inner 
bracts sometimes bifid-tipped ; awns of pappus rather longer than 
in type, surpassing middle of disc-corolla. Another form of 
especially dry ground, apparently. 
2. Silver Reef, 3,500 ft., May 4, 1894, I. &. Jones. Only in 
bud ; very narrow linear leaf-segments; 12 outer bracts; stems 
Several, four slender and coequal, all strongly reddish; root 7 
