COMPOSITE. 385 



1. 0. Aiulersoiiii, Greene, Pitt. iii. Ii7 (1H96); Gray, Proc. Am. Acad, 

 vi. 540 (1865), uader Erigeron, and 1. c. vii. 352 (1868), under Aster Long 

 radical leaves linear, acute, 3 — 5-nerved, narrowed at base; those of tbe 

 scapes much reduced, the uppermost mere subulate bracts: the large 

 hemispherical involucre somewhat woolly, its bracts linear-lanceolate, 

 herbaceous, biserial: ligales uniserial, broadly linear: achenes pubes- 

 cent. — A beautiful rather dwarf aster-like perennial in moist subalpine 

 places of tlie middle Sierra. 



2. O. elatuin, Greene, 1. c. Glabrous, even to the involucre; scapi- 

 form branches decumbent at base, 12—20 in. high, leafy-bracted; lower 

 cauline leaves linear, acute, 4—6 in. long: heads more than 1 in. broad, 

 low-hemispherical; bracts in about 3 series, all with broad-linear sub- 

 cartilaginous base, and triangular-subulate herbaceous long tip: rays 

 deep violet: ovaries glabrous. — On Mt. Dyer, Plumas Co., July, 1879, 

 M)-s. Austin. 



27. BELLIS, Tournefort. (Daisy.) Low herbs. Involucres broad, 

 many-flowered; bracts of nearly equal length Rays many, white or 

 reddish. Disk-corollas yellow. Style appendages short, triangular. 

 Achenes obovate, compressed, nerved on the margins. Pappus none. 



1. B. PERENNis, Linn. Sp. PI. ii. 886 (1753). Perennial, acaulescent: 

 leaves obovate: scapes several, each with a single head. — Escaped from 

 gardens, and naturalized in the western counties from at least Marin 

 and Alameda northward. 



28. CONYZELLA, DUlenins. (Fleabane) Annuals with panicled 

 small heads of whitish very inconspicuous flowers. Involucres ovoid, of 

 2 or 3 series of imbricated subulate bracts. Rays few and small, short 

 and suberect, or none. Disk-corollas all slender and 4—5 toothed, or 

 some of the outer filiform and truncate. Style-appendages short, 

 obtuse. Achenes compressed, with marginal ribs and a sparse strigose 

 pubescence. Pappus scanty and simple, the scabrous bristles short and 

 fragile, or longer, firmer and more enduring. 



1. C. Canadensis, Rupr. in Mem. Acad. Petersb. Ser. 7. xiv. n. 4 

 (1869); Linn. Sp. PI. ii. 863 (1753), under Erigeron. Sparsely hispid or 

 nearly glabrous; stem stout, erect, 1 — 6 ft. high, with countless small 

 subcylindric heads in a rather dense panicle: lowest leaves spatulate, 

 upper linear: heads only 2 lines high: rays white, very short. — A weed 

 in cultivated lands, or by waysides; less common in California, where it 

 is doubtless barely naturalized, than in tbe Atlantic States, where it is 

 thought to be indigenous. Sept. — Nov. 



