Microseris. COMPOSITE. 419 



akene attenuate above almost into a beak ; pappus silvery white ; very delicate awn barely 

 half the length of the more deeply notched palea. — Calais lineari/hlia, DC. 1. c, excl. syn. 

 Uropappus Unearifolius & U. g rand i floras, Nutt. Traus. 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 slightlv attenuate toward the summit: pappus sordid; paleai bearing a stronger and 

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

 and their akenes ])ubcscent. — 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. 



* * Paleoe 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 § Uucalais, DC, &c. 



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

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

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

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

 the awn, e.xternally either lightly or cons])icnously villous. — Proc. Am. Acad. xix. 65. — 

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



-t— H— Akenes from slender-subclavate to turbinate, the cell fdled by the seed. 



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

 bristles fragile or deciduous. 



M. aphantocdrplia, Gray, 1. c. Involucre merely calyculate : akenes (H to 2 lines long) 

 ublong-elavate, witli usually some constriction or rounding of tlie summit, shorter than 

 the rigid capillary awns of the pappus; tliese 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 

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

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



-H- -H- Palea- of the pappus conspicuous, persistent. 



= Akene (with truncate summit) little over a line long and tlie long-awncd paleas of the pappus 

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



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

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

 delt<jid or sometimes rather narrower, either obscurely emarginate or more attenuate into 

 a sleuder awn of about 4 times tlie lengtli : sometimes a minute villosity covering the trun- 

 cate summit of the akene. — California, cominon in Contra Costa Co., Ilall, Lcvnnon, Parry, 

 Greene, &c. Between A/, aphantocarjiha and M. Bigelovii. 



= = Akenes 2 or .3 lines long, some of the outermost not rarely villous : pale;e 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 

 a]i])arentlv all glabrous, slenderly .^^omewhat fusiform-turbinate (obscurely contracted between 

 middle and summit), almost 3 lines long, not half the length of the ])appus : paloiC narrowly 

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

 Dow/lasii, Gray, Pacif. R. Rep. iv. 11.3, not DC. — California, on Mark West's Creek, Bigelow 

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

 Nevada, Mrs. Curran, with paleas 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 : paleaj of the pappus oblong- 

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

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



