418 COMPOSITE. Microseris. 



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

 California ; first coll. by Douglas. Some forms are to be distinguislied from tlie smaller of 

 the preceding by the pappus only. 



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

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

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

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

 palete 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. Hi/menonenia? glaucum, Hook. 1. c. ? Calais laciniata, Gray, Proc. Am. Acad, 

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

 Columbia River, Garrij ? Nuitall, Hall, Siiksdorf. 



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

 to somewhat spatulate, 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 higli; 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. Micros'-ris leptosepala. Gray, 

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

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

 ently same from Seattle, Washington Terr., ^Jl■s. Summers 



* # * Pappus-bristles or awns 5, not over thrice the length of the palea, rising fj-om an apical 

 cleft, rather strongly denticulate. 



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

 from entire to laciniate-pinnatifid : scape 7 inches high ; involucre canipanulate, half-incli 

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

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

 Bound. 104. — S. California, near San IJiego, Parrg. Known only from scanty and inipeF" 

 fpctly developed specimens ; perhaps not of this section. 



§ 3. CiLAis. Pappus of 5 scarious avt'n-tipped paleas (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 thinnisli 

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

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

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

 DC. Prodr. vii. 85. 



* PaleiE 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 : acauleseent, with slender scapes and 

 middle-sized or sniallo- heads. — ddnis § Calvcalais, DC. I. c. 



■i- Awn very long in proportion to the palete of the pappus. 

 M. macroch»ta, Gray, 1. u. Subcaulescent : scapes or peduncles sometimes even 2 feet 

 high; involucre narrow, 8 or 10 lines high; its bracts atteuuatc-arnmiuate, outermost fully 

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

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

 awn. — C((/o/s macroclurta. Gray, PI. Fendl. 112, & Pacif. R. Rep. iv'lls. — S. \V. Llaho 

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

 (Nullall, Clerehmd); but mature fruit still unknown. 



H- -1- Awn short in proportion to the lanceolate palea;, which about equal the akene: larger heads^ 

 mch or more high: involucral bracts less acuminate, tli.> few outer of variable length: scapes or 

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



-M. linearifolia, Gray, 1. c. Peduncle more or less thickened ujiward and in strono' plants 

 fistuh.us under the oblong head: leaves sometimes almost villous-pubesceut when%oung: 



