MEMOIRS OF THE NEW VORK BOTANICAL GARDEN. 1 23 



14.; Lower Geyser Basin, Aug. 4, 1897, Rydbcrg ti- Bessey, jjjg; 

 Upper Geyser Basin, Aug. 6, SJ4o; Electric Peak, Aug. 18, SJ4^- 



* Eriogonum ochroleucum Small. 



Perennial, tufted. Foliage' white or pale pubescent throughout; 

 leaves densely crowded on the very short stems; blades elliptic, 

 oblong or obovate-spatulate, 1-2 cm. long, obtuse, closely floccose 

 on both sides but less densely so above, cuneately narrowed into 

 slender often spirally twisted petioles, these as long as the blades or 

 somewhat shorter ; scapes erect, solitary or several together, slender, 

 conspicuously elongated, often 3-4 dm. long, rather loosely floccose, 

 topped by a dense head 1.5-2.5 cm. in diameter: bracts triangular 

 or lanceolate-triangular, 2-4 mm. long, acute or acuminate : involu- 

 cres 5-8 in each head, closely sessile, about 3 mm. long, woolly 

 without, rather sharply several-ribbed, with rounded or barely acute 

 teeth ; calices very numerous, ochroleucous, becoming about 4 mm. 

 long ; outer segments oblong ; inner segments spatulate, slightly 

 longer than the outer : filaments subulate, sparingly villous at the 

 base ; achene glabrous. 



Related to Eriogonwn ovalifoliuni Nutt., and with much the same 

 habit, but conspicuously taller. The leaves have much longer petioles 

 and the blades are relatively narrower than those of E. ovalifoliuiii. 

 The calices differ in their ochroleucous color, while the outer seg- 

 ments are merely oblong as compared with the suborbicular or orbic- 

 ular-obovate segments of the Nuttallian species. 



On dry hills at an altitude of 1500-2500 m. 



Montana: Elk Mts., near Black Hawk, i'Sg6, Flodiiian, j/j; 

 Cottonwood Creek, J/^; Great Falls, 1891, R. S. Williams, 120; 

 Spanish Basin, June 23, 1897, Rydbcrg & Bessey, jj^j (type) ; 

 Indian Creek, July 21, S344. 



* Eriogonum proliferum Torr. & Gray, Rev. Eriog. in Proc. Am. 



Acad. 8: 164; Eriogonum ovalifolitLm proliferum Wats. Proc. 



Am. Acad. 12: 263 [Bot. Cal. 2 : 26] . 



Nearest related to ^. ovali/olium, hi\t inflorescence cymose-umbel- 

 late. 



Dry hills at an altitude of 2000-3000 m. 



Montana: Silver Bow Co., 1888, Tzvcedy, no and iioa; 

 Helena, 1890 and 1891, Kchey ; Madison Co., Tzvccdy, iiyg; Sil- 

 ver Bow Co., Mrs. XcUie Caspar. 

 Eriogonum multiceps Nees, Max. Reise N. A. 2 : 446 [Man. R. 



M. 316; 111. Fl. I : 545 ; Wats. Rev. 264]. 



