POLYGONACEAE. 



ii. 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. Scape erect, slender, 

 4 / -i2 / tall, white-tomentose, sparingly branched 

 above; leaves numerous, crowded, lanceolate or 

 narrowly oblong, ^ / -i / 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, i^"-2" high, sessile or pe- 

 duncled, 5-toothed, teeth obtuse; bracts small, lan- 

 ceolate; calyx campanulate, i^" long, villous; 

 stamens and style-branches exserted. 



Western Kansas to Colorado and Arizona. May-Xov. 



12. Eriogonum campanulatum Nutt. 

 Narrow-leaved Eriogonum. (Fig. 1297.) 



Eriogonum campanulatum Nutt. Journ. Acad. 



Phila. (II.) 1:163. 1848. 

 Eriogonum brei'icaule Xutt. Journ. Acad. Phila. 



(II.) 1:163. 1848. 

 Eriogonum micranthum Xutt. Journ. Acad. Phila. 



(II.) 1:164. 1848. 



Perennial, scapose, stem short, thick and 

 woody, more or less tomentose; scapes erect or 

 nearly so, glabrous, 4 / -i2 / tall; leaves crowded, 

 narrowly oblanceolate, spatulate or nearly linear, 

 i '-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, \" 

 long, 5-toothed, teeth obtuse; bracts triangular, 

 notfoliaceous; calyx yellow, ovoid-campanulate, 

 about i" long, 6-cleft, the lobes oblong or fiddle- 

 shaped, emarginate; stamens and style-branches 

 exserted; achene T.%" long, enlarged at base. 



Nebraska to Oregon, south to Utah and New 

 Mexico. Juty-Sept. 



13. Eriogonum cernuum Xutt. Nod- 

 ding Eriogonum. (Fig. 1298.) 



E. cernuum Xutt. J. Acad. Phila. (II.) i: 162. 184$. 



Annual, low, stem very short; scape erect, usu- 

 ally much branched, 6 / -i2 / high. Leaves con- 

 fined to the short stem, orbicular or oblong- 

 orbicular, less than i' long, obtuse or slightly 

 apiculate, flat, floccose-tomentose, especially be- 

 neath, petioled; inflorescence paniculate; involu- 

 cres campanulate, slightly more than }' 2 " long, 

 solitary on slender deflexed peduncles i' longer 

 less, 5-cleft to near the middle, the lobes obtuse; 

 bracts triangular or lanceolate, not foliaceous; 

 calyx whitish, campanulate, ^ r/ long, 6-parted, 

 slightly constricted near the summit, the seg- 

 ments fiddle-shaped; stamens and style-branches 

 included; achene W long, nearly globular at 

 the base, rough on the angles. 



Nebraska to New Mexico and Utah. July-Sept. 



