Microscris. COMPOSITE. 419 



akene attenuate above almost into a beak : pappus silvery wh'ite ; very delicate awn barely 

 half the length of the more deeply notched palea. — Calais linearifolia, DC. 1. c, excl: syn. 

 Uropappus linearifolius & U. grandiftorus, Nutt. Trans. Am. Phil. Soc. vii. 425. — Open low 

 grounds, throughout California, to Nevada, Arizona, and New Mexico. 

 M. Lindleyi, Gray, 1. c. Peduncle little or not at all thickened upward : akene gradually 

 and slightly attenuate toward the summit : pappus sordid ; paleoe bearing a stronger and 

 more exserted awn from a shallow notch, sometimes those of the marginal flowers villous, 

 and their akenes pubescent. — Calais Lindleyi, DC. 1. c, excl. syn. Uropappus Lindleyi & 

 U. heterocarpus, Nutt. 1. c. — California, from San Francisco Bay to San Diego; apparently 

 less common than the preceding. 



* * Palete of the sordid or merely whitish pappus entire, surmounted by the awn, conspicuous 

 except in the second species: scapes slender, a span to 18 inches high: akenes mostly upwardly 

 scabrous on the 10 equal ribs, occasionally the outermost villous. — Calais § Eucalais, DC, &c. 



+- Akenes attenuate-fusiform, the upper and slightly narrowed half not occupied by the seed! 

 M. attenuata, Greene. Leaves mostly pinnately parted into narrow linear lobes : scapes 

 a span or two high : involucre half-inch high, barely calycnlate at base : pappus of the 

 length of the akenes (nearly 4 lines) ; the palea: oblong-lanceolate, about half the length of 

 the awn, externally either lightly or conspicuously villous. — Proc. Am. Acad. xix. 65. — 

 California, at Berkeley and hills north of Monte Diablo, Greene. 



4— 4— Akenes from slender-subclavate to turbinate, the cell filled by the seed, 



++ Palese of the pappus very small (not over half-line long) or obsolete, glabrous, and the slender 

 bristles fragile or deciduous. 



M. aphantocarpha, Gray, 1. c. Involucre merely calyeulate : akenes (l£ to 2 lines long) 

 oblong-clavate, with usually some constriction or rounding of the summit, shorter than 

 the rigid capillary awns of the pappus : these merely deltoid-dilated at base, or hardly so. — 

 Calais aphantocarpha, Gray, Proc. Am. Acad. vi. 552. — California, in Alameda and Contra 

 Costa Co. ; first coll. by Brewer. 



Var. tenella, Gray, 1. c. Depauperate in the original specimens : bristles of pappus 

 2 to 5, sometimes with manifest broadly-ovate palea at base, sometimes deciduous. — Calais 

 (Aphanocalais) tenella, Gray, Pacif. R. Bep. iv. 114, t. 17. — Same range, and along the 

 Napa and Lower Sacramento ; first coll. by Bigelow & Fitch. 



++ ++ Paleae of the pappus conspicuous, persistent. 



= Akene (with truncate summit) little over a line long and the long-awned palese of the pappus 

 of not more than half its length, both glabrous : head small. 

 M. elegans, Greene, in herb. A span to a foot high, slender : head in fruit less than half- 

 inch high : akenes tapering gradually from very summit to base : paleoe of the pappus ovate- 

 deltoid or sometimes rather narrower, either obscurely emarginate or more attenuate into 

 a slender awn of about 4 times the length : sometimes a minute villosity covering the trun- 

 cate summit of the akene. — California, common in Contra Costa Co., Hall, Lemmon, Parry, 

 Greene, &c. Between M. aphantocarpha and M. Bigelovii. 



= = Akenes 2 or 3 lines long, some of the outermost not rarely villous : palese of the pappus 

 seldom shorter, in the same species and even in the same head disposed to be either glabrous or 

 scabro-puberulent, or externally villous. 



M. acuminata, Greene. A span or two high : head in fruit about inch high : akenes 

 apparently all glabrous, slenderly somewhat fusiform-turbinate (obscurely contracted between 

 middle and summit), almost 3 lines long, not half the length of the pappus : palea; narrowly 

 lanceolate, gradually attenuate into a rather shorter awn. — Bull. Torr. Club, x. 88. Calais 

 Douglasii, Gray, Pacif. B. Bep. iv. 113, not DC. — California, on Mark West's Creek, Bigelow 

 (has passed for the following species; pappus nearly glabrous). Foot-hills of the Sierra 

 Nevada, Mrs. Curran, with palese minutely silky-villous externally. 



M. Bigelovii, Gray. A span to a foot or more high : head half-inch or more high : involucre 

 inclined to be somewhat imbricated : akenes oblong-turbinate, not contracted under the trun- 

 cate summit, only <2 lines long; outermost sometimes villous : palese of the pappus oblong- 

 to ovate-lanceolate, mostly if not always glabrous, or scaberulous, varying considerably in 

 size, only half or a third the length of the awn. — Proc. Am. Acad. ix. 209. Calais Bige- 



