Aster. COMPOSITE. 325 



Sierra Nevada, between Clark's ami the Yosemite, at ahout S.Onn feet, Bnlnuh-r. Near Dormer 

 Lake (Torrcy, Greene), and Sierra Valley, Lemrmm. Found near Carson by Dr. Anderson; 

 thence east to the Koeky Mountains. 



+- -f-+- Stems simple, naked nt the summit, and bearing a single head, or rarely 

 two or three: scales of the liemispherical involucre very little imbricated, narrow, 

 nearly equal, and destitute of foliaceous or green tips. (A transition from Aster to 

 Erigeron.) 



++ Leaves broad or narrowish : style-appendages short and broad. 



13. A. salsuginosus, Richardson. Minutely pubescent or glabiate : stem 6 to 

 18 inches high, leafy to near the summit: leaves entire; the lowest spatnlate, obo- 

 vate, or oblanceolate, tapering into a margined petiole ; the upper becoming lance- 

 olate and ovate-lanceolate, acute, with broad base usually half-clasping; uppermost 



reduced to one or two subulate bracts : head solitary or two or three on naked 

 peduncles : scales of the involucre slender, glandular, nearly equal, 4 lines long, 

 loose : rays 30 to 40, violet or purple : akenes of the ray 5 - 6-nerved, of the disk 

 3 - 4-nerved. — Hook. Lot. Mag. t. 2942. 



Var. angustifolius, <Jray. Radical and lowest cauline leaves linear-spatulate, 2 

 to 5 lines wide ; the upper linear : stems a foot high, naked above, bearing two or 

 three slender-pednncled heads. 



Subalpine and alpine meadows, in the Sierra Nevada, at 6,000 to 10,000 feet ; thence to alpine 

 regions of the Colorado Koeky Mountains, and north to Alaska and the subarctic regions. A 

 handsome species ; the heads an inch and a half in diameter, including the expanded rays. The 

 variety, Sierra County, Lt:mm<m. 



++ ++ Leaves very narroiu : style-appendages long and slender-subulate. 



14. A. Andersonii, Gray. Lightly woolly when young, becoming glabrous : 

 stem simple ami scape-like, a span to a foot high, terminated by a single rather 

 large head : radical leaves tufted, linear, almost grassy (2 to 8 inches long, from a 

 line to 4 lines wide), coriaceous, 3-7-nerved; the cauline smaller, the uppermost 

 subulate : scales of the involucre lanceolate or linear, loose, more or less tomentose, 

 almost equal in length (4 or 5 lines long), the outer ones greenish : rays 16 to 20, 

 purple : akenes oblong, 4-6-nervcd : bristles of the pappus barbellate-serrate. — Proc.. 

 Am. Acad. vii. .">•">:.'. Erigeron Andersonii, Gray, I. c. vi. 540. 



Wei alpine meadows, &c., Sierra Nevada, from Mariposa to Sierra Co., at 7,500 to 10, 



feet lii-.ruv.ivd by Dr. Anderson, near Cars Nevada. Expanded lead with the rays an 



inch or more in diameter. 



A. PULCHEI.I.ls, Eaton in Hot. King Exp. is perhaps too near this, and A. AUMOF.Nrs, Gray, 

 1. c viii. 380, is also closely related; they form a peculiar group in the Xylorhiza section of 

 Orthonu 



§ 4. Annuals or biennials, with chiefly entire narrow leaves : scales of the involucri 

 imbricated, narrow, destitute of distinct green tips: akenes narrow and 3—5- 

 nerved: pappus fine and soft. — ( >\i rRiPOLitrjr, Torr. & I Iray. 



15. A. divaricatus, Null. Glabrous, diffusely much branched, a foot or two 



high: the branches slender : lower cauline leaves lam late; the upper linear ami 



at length subulate, very acute: heads small (3 or 4 lines long), loosely panicled: 

 scales of the involucre 25 to 30, lanceolate-subulate, with greenish back and scari- 

 oiia margins : rays linear, exserted, numerous in a single row : akenes very minute!} 

 pubescent, 5 — 6-nerved. — Ton. & Gray, II. ii. 163. 



Sail marshes, San Francisco, &c, Bolander. This is the Pacific form, viz., Tripolium con- 

 e of Lindley, and ./. I ol N oi tall, which inhabits tin i the conti- 



nent down i" I lull, .iiel apparentl] is onlj local bo far north .,- California. It differs from the 

 ./. divaricatus of the Atlantic coasl in the mi lei firmer and grconor scales of the involucre, heads 

 incline, I to be larger, and the I, i. in, hes |,^s slender. The mature akenes in both are littli 

 I ii, i ,l .ii el He hi ,.i less distinctly 5-ncrved. 



