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 linear (folia, DC. 1. c., excl. syn. 

 Urojjajipus lincurifolius & U. yrandi floras, Nutt. Trans. Am. Phil. Soc. vii. 425. Open low 

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



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

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

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

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

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

 less common than the preceding. 



* # Palese 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. 



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



M. attenuata, GREENE. Leaves mostly piunately 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 palea; oblong-lanceolate, about half the length of 

 the awn, externally cither lightly or conspicuously villous. Proc. Am. Acad. xix. 05. 

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



-f -t Akenes from slender-subclavate to turbinate, the cell filled by the seed. 



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

 bristles fragile or deciduous. 



M. aphantocarplia, GRAY, 1. c. Involucre merely calyculate : akenes (H 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 

 (Ap/ianocalais) tenella, Gray, Pacif. R. Rep. iv. 114, t. 17. Same range, and along the 

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



-H- -H- Palere 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 : palea; 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, Lcinmon, Parry, 

 Greene, &c. Between M. aphantocarpha and M. B/gelovii. 



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

 seldom shorter, in the same species and even in the same head disposed to be cither 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 

 Dounlasii, Gray, Pacif. R. Rep. 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 palea; 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: palea; 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- 



