328 COMPOSITE. Erigeron. 



or purplish (about 3 lines long) : appendages of the style extremely short and 

 obtuse : akenes 2 - 3-nerved, minutely hairy : the short squamcllate outer pappus 

 conspicuous. 



Var. teuenim, Gray. Slender and small, with weaker stems and small heads ; 

 involucre only 2 lines high, less hirsute. 



Eastern side of the Sierra Nevada : thence to the Rocky Mountains and New Mexico. The 

 only genuine form coUeeted on the borders of the State is from Carson City, Br. Ajidcrson. — 

 Var. teiurum, summit of Silver Mountain near Ebbett's Pass, alt. 11,000 feet. Braver. Also col- 

 lected by Watswi ou Star Peak, N. W. Nevada, at 9,000 feet. 



At Mono Pass, around rocks, Dr. Bolander collected a plant which would appear to belong to 

 E. cccspitosum, although with rather longer and narrower leaves : but the pappus appears to be 

 simple. 



6. E. Nevadense, Gray. Slightly hoary with fine mostly appressed roughish 

 pubescence : stems erect or ascending from long and slender subterranean rootstocks, 

 a span to a foot high, simple, leafy below, mostly naked above or scape-like, bearing 

 a solitary large head : leaves linefar-lanceolate or spatulate-linear, narrowed below, 

 the lowest into a petiole (the whole 2 to 6 inches long), the cauline acute, the 

 uppermost reduced to subulate bracts : involucre hirsute, also minutely glandular ; 

 the scales mostly equal (4 lines long) : rays 25 to 30 in a single series, rather 

 broadly linear, white, 3 or 4 lines long : style- appendages ovate and acute : akenes 

 minutely pubescent, flat, oblong, 2-nerved, or some of the outer 3-nerved (2 lines 

 long) : the short setiform outer pappus scanty and inconspicuous. — Proc. Am. 

 Acad. viii. 649. E. ccespitosum, var. grandiflorum, Eaton in Bot. King Exp. 153, 

 in part (viz. No. 548), not of Torr. & Gray. 



Var. (I) pygmceum, Gray, 1. c. Dwarf and densely cespitose : leaves spatulate- 

 linear (half an inch or less than an inch long, barely a line wide at the summit), 

 crowded on the rootstocks : flowering stems nearly naked and scape-like, an inch or 

 two high : heads much smaller : rays narrower, barely 3 lines long, purple. 



Sierra Nevada : Mount Stanford and Sierra Valley {Bolander, Kellogg, Lemmon) ; and in 

 Nevada, Cedar Hill and on Mount Davidson {Bloovwr), and West Hiimboldt Mountains, Jl'idson. 

 Var. iWJ'^"^^'^^ Ebbett's and JMono Pass, alt. 9,500 to 10,750 feet. Brewer. 



E. ARGENTATiTM, Graj', 1. c, wliich S. Watson collected on the foot-hills of the Pah-Ute 

 Mountains in Nevada, may be known by the tine silvery-silky foliage, soft-pubescent several- 

 nerved akenes, and conspicuous outer i^appus. E. canum. Gray, has glabrous, narrow, several- 

 ribbed akenes. 



7. E. Bloomeri, Gray. Somewhat hoary with minute appressed pubescence : 

 leafy stems short and tufted on the thickish rootstock : leaves crow^ded, flliform- 

 linear, or the broadest spatulate-linear tapering into a filiform petiole, 1 or 2 

 inches long : flowering steins erect, naked and scape-like at least above the middle, 

 a span high, bearing a solitary head : involucre somewhat campanulate (4 or 5 lines 

 high), villous ; the scales equal : rays none : style-appendages acute : akenes miiuitely 

 pubescent, flat, oblong-linear, and with only marginal nerves (2 Hues long) : pappus 

 simple. — Proc. Am. Acad. vi. 540; Eaton in Bot. King Exp. 148. 



Sierra Valley (?) Bolander. Virginia and Carson City {Bloomer, Anderson), and W. Nevada, 

 Watson. Allied to the foregoing ; with foliage nearly of the following. 



8. E. ochroleucum, Nutt. Minutely somewhat hoary with a fine appressed 

 hirsute pubescence, or glabrate : leaves very narrowly linear and tapering to the 

 base or nearly filiform, mostly crowded on the rootstocks, one or two inches long, 

 the cauline rather few and scattered : flowering stems slender, about a span high, 

 naked at summit, bearing solitary or rarely 2 or 3 heads : involucre more or less 

 hirsute (barely 3 lines high) ; the scales rather rigid ■: rays 30 or 40, cream-color or 

 white (2 or 3 hnes long) : akenes minutely pubescent, 2 - 3-nerved : pappus plainly 

 double, the outer of very short subulate squamellaj. 



Sierra Nevada near Summit ; thence eastward aaid northward nearly to British Coluniliia. The 

 forms with leafy stems ap[>roach the next. 



