418 COMPOSITE. Microseris. 



Gray, Pacif. R. Rep. iv. 112. — Alluvial ground, Washington Terr, and Oregon to N. W. 

 California ; first coll. by Douglas. Some forms are to be distinguished from the smaller of 

 the preceding by the pappus only. 



M. leptosepala, Gray. Slender, a foot or less high : leaves from linear to narrowly lan- 

 ceolate, and from entire to attenuate-pinnatifid : heads comparatively small and fewer- 

 flowered : involucre only half-inch high, of fewer bracts reduced almost to two series ; outer 

 ovate or oblong with abrupt acuminatiou, inner lanceolate-attenuate : akenes more slender : 

 paleae of the pappus (often only 8) ovate-lanceolate or narrower, a quarter or fifth of the 

 length of the akene, tapering from base gradually into the awn. — Proc. Am. Acad. ix. 209, 

 Bot. Calif. 1. c. in part only, & Proc. Am. Acad. xix. 64. Scorzonella leptosepala (& S. glauca), 

 Nutt. 1. c. Hymenonema ? glaucum, Hook. 1. c. 1 Calais laciniata, Gray, Proc. Am. Acad, 

 viii. 208, pi. Hall: — Low grounds and meadows, Washington Terr. & Oregon, along the 

 Columbia River, Garry ? Nuttall, Hall, Suksdorf. 



M. Bolanderi, Gray. Slender, a foot or two high : leaves from narrowly linear-lanceolate 

 to somewhat spatnlate, entire or with a few small salient linear lobes ; radical a span to a 

 foot long including the margined petiole : involucre half to two-thirds inch high; its bracts 

 all gradually lanceolate-attenuate from a broadish base, or some small outermost ovate and 

 abruptly acuminate : palete of the pappus (8 to 10) little exceeding the breadth of the akene, 

 broadly ovate, mostly obtuse, abruptly tipped by the long slender awn. — Proc. Am. Acad, 

 xix. 64. Calais Bolanderi, Gray, Proc. Am. Acad. vii. 365. Microseris leptosepala, Gray, 

 Proc. Am. Acad. ix. 209, in part, & Bot. Calif, i. 425, as to Californian plant. — Swamps, 

 Mendocino and Humboldt Co., N. W. California, Bolander, Kellogg, Rattan, Pringle. Appar- 

 ently same from Seattle, Washington Terr., Mrs. Summers. 



# # # Pappus-bristles or awns 5, not over thrice the length of the palea, tising from an apical 

 cleft, rather strongly denticulate. 



M. Parryi, Gray. Furf uraceous-puberulent : leaves all radical, lanceolate, a span long, 

 from entire to laciniate-pinnatifid : scape 7 inches high : involucre campanulate, half-inch 

 high, of ovate and oblong and hardly acuminate bracts : ligules little exserted. — Proc. Am. 

 Acad. ix. 209, & Bot. Calif. 1. c. Calais Parryi, Gray, Pacif. R. Rep. iv. 122, & Bot. Mex. 

 Bound. 104. — S. California, near San Diego, Parry. Known only from scanty and imper- 

 fectly developed specimens ; perhaps not of this section. 



§ 3. Calais. Pappus of o scarious awn-tipped palese (in one species some- 

 times fewer or deciduous, and with only minute palea at base of the capillary 

 awn) : involucre either sparingly imbricated or merely calyculate, of thinnish 

 bracts, the principal ones lanceolate : acaulescent or subcaulescent annuals, with 

 leaves very variable in all the species, some narrow and entire, some laciniate- 

 toothed, some very commonly pinnatifid or parted into slender lobes. — Calais, 

 DC. Prodr. vii. 85. 



# Paleae of pappus acutely bifid or bidentate at apex by early splitting away from the base of the 

 awn, which thus rises from the notch : akenes more or less slender and narrower upward, but not 

 rostrate, for the slender seed reaches nearly to the apex : acaulescent, with slender scapes and 

 middle-sized or smaller heads. — Calais § Calocalais, DC. 1. u. 



-i— Awn very long in proportion to the paleae of the pappus. 



M. macrocheeta, Gray, 1. c. Subcaulescent : scapes or peduncles sometimes even 2 feet 

 high: involucre narrow, 8 or 10 lines high; its bracts attenuate-acuminate, outermost fully 

 half the length of the inner : forming akenes decidedly contracted toward summit : pappus- 

 palese thin, small, cleft quite to the middle from the first, bearing a long and weak capillary 

 awn. — Calais macrochmta, Gray, PI. Fendl. 112, & Pacif. R. Rep. iv. 113. — S. W. Idaho 

 (Spalding), and California along the coast from San Francisco (Bigelow) to San Diego 

 (Nuttall, Cleveland) ; but mature fruit still unknown. 



-i— -i— Awn short in proportion to the lanceolate paleae, which about equal the akene : larger heads 

 inch or more high: involucral bracts less acuminate, the few outer of variable length: scapes or 

 scapiform peduncles rising from a span to even 2 feet in height. 



M. linearif olia, Gray, 1. c. Peduncle more or less thickened upward and in strong plants 

 fistulous under the oblong head : leaves sometimes almost villous-pubescent when young : 



