650 



POLYGONACEAE. 



VOL. I. 



6. Eriogonum pauciflorum Pursh. Few- 

 flowered Eriogonum. Fig. 1588. 



E. pauciflorum Pursh, Fl. Am. Sept. 735. 1814. 

 Eriogonum parviflorum Nutt. Gen. I : 261. 1818. 



Perennial, root long and slender, stems very short, 

 simple or sparingly branched, loosely tufted, covered 

 by the scarious dilated bases of the petioles. Scapes 

 erect, slender, simple, slightly tomentose, 2'-6' high ; 

 leaves linear or linear-spatulate, i'-3' long, rather ob- 

 tuse, but apparently acute from the strongly revolute 

 margins, glabrous or sparingly pubescent above, white- 

 tomentose or cottony beneath, narrowed into slender 

 petioles; inflorescence capitate; involucres 4-10, \\" 

 long, turbinate-campanulate, 5-toothed, the teeth ob- 

 tuse, more or less reflexed; calyx white, campanulate, 

 \\" long, glabrous, the segments ovate; achene is" 

 long, its faces swollen at about the middle, incon- 

 spicuously striate-reticulated. 



On dry plain? Nebraska and Colorado. July-Sept. 



7. Eriogonum multiceps Nees. Branched 

 Eriogonum. Fig. 1589. 



E. multiceps Nees. Max. Reise N. A. 2 : 446. 1841. 

 E. gnaphaloides Benth. Kew. Journ. Bot. 5 : 263. 1853. 



Perennial by a slender root, scapose, densely 

 white-tomentose throughout; stems short, tufted, 

 much branched, sometimes several inches long. 

 Scapes simple, i'-s' high ; leaves spatulate, \'-2 r 

 long, numerous, obtuse at the apex, narrowed 

 below into petioles; inflorescence capitate; involu- 

 cres 3-12, sessile, ii" long, 5-6-toothed, the teeth 

 acute; bracts foliaceous, spatulate; calyx white or 

 rose-color, ii"-2j" long, campanulate, some- 

 what villous, 6-cleft to about the middle, the seg- 

 ments cuneate, obtuse or emarginate ; stamens and 

 style-branches exsertcd ; achene " long. 



On dry plains, Nebraska and Colorado. June-Aug. 



8. Eriogonum lachnogynum Torr. Long- 

 rooted Eriogonum. Fig. 1590. 



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'-i' long, acute at the apex, nar- 

 rowed at the base, silky above, white-tomentose 

 beneath, long-petioled, their margins somewhat 

 revolute ; inflorescence irregularly umbellate or 

 paniculate; involucres broadly campanulate or nearly 

 hemispheric, \\"-2." high, sessile or pecluncled, 

 5-toothed, teeth obtuse ; bracts small, lanceolate ; 

 calyx campanulate, li" long, 'villous ; stamens and 

 style-branches exserted. 



Western Kansas to Colorado and Arizona. May-Nov. 



