CATALOGUE. I99 
teetli towards the base ; upper ones smaller and passing into subulate bracts, 
(always?) anriculate with 2 minute teeth; heads peduncled, irregularly 
corymbose-paniculate, 3" long, 3-9-flowered ; involucre as in the last ; achenia 
linear, straight, shghtly enlarging upward, strongly 5-angled and with a 
double row of tubercles between the angles ; pappus usually of 15 seta3, 
plumose from near or below the middle to the top, 3 from each angle of the 
achenium, with their shghtly dilated bases commonly united. — The setae are 
sometimes plumose for the greater part of their length, and tlic dilation at 
their base is scarcely greater than in S. paniculala, whicli has, moreover, 
quite as rugose and tubercled an achenium ; it seems, therefore, advisable to 
merge HemijHiUujn into Stephanomeria. California to Colorado and New 
Mexico; Virginia City, (Bloomer.) Foot-hills tliroughout Nevada, aiul 011 
Carrington Island, Great Salt Lake; 4,500-6,000 feet elevation ; June-August. 
Plate XX. Figs. 6 and 7. Achenium and three united bristles of the 
pappus; magnitied twelve diameters. (701.) 
Stephanomeria pentacpi^ta. Annual (?); stem 1° high, perfectly glab- 
rous, and whitish, diffusely branching ; leaves linear-subulate, auriculate witli 
small teeth, or the larger ones runcinately toothed, the uppermost minute and 
bractlike ; heads 5-flowcred, peduncled, panicled, 3-4" long ; involucre of 5 
scales, besides 4-5 bractlets ; achenia linear-oblong, 5-costate, with a double 
row of tubercles between the costss ; setse of the pappus 5, one at each angle 
of the aclienium, rather longer than the achenium, slightly dilated and 
setulose at the base, the upper half plumose. — Truckee and Humboldt Val- 
leys ; 4,500 feet elevation ; September. Plate XX. Fig. 8. A small branch; 
natural size. Figs. 9 and 10. Achenium and seta; magnified twelve diame- 
ters. (702.) 
HiEEACiUM Scouleri, Hook. Stems 1-3° high, hispid and almost 
shaggy with coarse spreading hairs, (3-4" long,) leafy ; lower leaves 5-<S' 
long, 9-12" wide, oblanceolate, mostly acute, sessile or nearly so ; upper ernes 
usually few and smaller ; heads 6' long, in a somewhat rounded panicle ; 
peduncles erect ; involucre calyculate or somewhat ind)ricated, glandular- 
puberulent and sparsely hairy ; flowers yellow, about 20 ; aclienia not nar- 
rowed at the summit. — A coarse plant, in appearance between H. Gronovii 
and H. longiinlum. The stem is leafy in some specimens, in others nearly 
naked. Nutka to Oregon. Goose-Creek Mountains, and in tlie canons of 
