POLYGONACEAE. 
11. Eriogonum lachnogynum ‘Torr. 
Long-rooted Eriogonum. (Fig. 1296.) 
Eriogonum lachnogynum Torr.; Benth. in DC. Prodr. 
14:8. 1856. 
Perennial, scapose, root long, fusiform, stems 
stout and short, tufted, much branched, covered 
with the dilated petiole-bases, Scapeerect, slender, 
4-12’ tall, white-tomentose, sparingly branched 
above; leaves numerous, crowded, lanceolate or 
narrowly oblong, %/-1’ long, acute at the apex, 
narrowed at the base, silky above, white-tomen- 
tose beneath, long-petioled, their margins some- 
what revolute; inflorescence irregularly umbellate 
or paniculate; involucres broadly campanulate or 
nearly hemispheric, 114’’-2’’ high, sessile or pe- 
duncled, 5-toothed, teeth obtuse; bracts small, lan- 
ceolate; calyx campanulate, 114’’ long, villous; 
stamens and style-branches exserted. 
Western Kansas to Colorado and Arizona. May-Nov. 
12. Eriogonum campanulatum Nutt. 
Narrow-leaved Eriogonum. (Fig. 1297.) 
Eriogonum campanulatum Nutt. Journ. Acad. 
Phila. (II.) 1: 163. 1848. 
Eriogonum brevicaule Nutt. Journ. Acad. Phila. 
(II.) 2: 163. 1848. 
Eriogonum micranthum Nutt. Journ. Acad. Phila. 
(II.) r: 164. 1848. 
Perennial, scapose, stem short, thick and 
woody, more or less tomentose; scapes erect or 
nearly so, glabrous, 4/—12/ tall; leaves crowded, 
narrowly oblanceolate, spatulate or nearly linear, 
1/-3/ long, obtuse at the apex, narrowed into long 
petioles, white-tomentose on both sides, the 
margins sometimes revolute; inflorescence com- 
poundly cymose; involucres oblong-turbinate, 1// 
long, 5-toothed, teeth obtuse; bracts triangular, 
not foliaceous; calyx yellow, ovoid-campanulate, 
about 1’’ long, 6-cleft, the lobes oblong or fiddle- 
shaped, emarginate; stamens and style-branches 
exserted; achene 114’’ long, enlarged at base. 
Nebraska to Oregon, south to Utah and New 
Mexico. July-Sept. 
13. Eriogonum cérnuum Nutt. Nod- 
ding Eriogonum. (Fig. 1298.) 
E. cernuum Nutt. J. Acad. Phila. (II.) 1: 162, 1848. 
Annual, low, stem very short; scape erect, usu- 
ally much branched, 6’-12’ high. Leaves con- 
fined to the short stem, orbicular or oblong- 
orbicular, less than 1/ long, obtuse or slightly 
apiculate, flat, floccose-tomentose, especially be- 
neath, petioled; inflorescence paniculate; involu- 
cres campanulate, slightly more than 13’ long, 
solitary on slender deflexed peduncles 1’ long or 
less, 5-cleft to near the middle, the lobes obtuse; 
bracts triangular or lanceolate, not foliaceous; 
calyx whitish, campanulate, 14’’ long, 6-parted, 
slightly constricted near the summit, the seg- 
ments fiddle-shaped; stamens and style-branches 
included; achene 3’ long, nearly globular at 
the base, rough on the angles. 
Nebraska to New Mexico and Utah, July-Sept. 
