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 atteuuate-piunatifid : 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 acumiuation, inner lanceolate-attenuate : akeues more slender : 

 pale* 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. Froc. Am. Acad. ix. 209, 

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

 Nutt. 1. c. Ht/menonema ? glaucum, Hook. 1. c. 1 Calais laciniata, Gray, Froc. 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 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 high ; its bracts 

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

 abruptly acuminate : paleas of the pappus (8 to 10) little exceeding the breadth of the akeue, 

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

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

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

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

 ently same from Seattle, Washington Terr., A/ Vs. tin miners 



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

 cleft, rather strongly denticulate. 



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

 from entire to laciniate-pinuatifid : scape 7 inches high : involucre campauulate, half-inch 

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

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

 Bound. 104. S. California, near San Diego, Pair;/. Known only from scanty and imper- 

 fectly developed specimens; perhaps not of this section. 



3. CALAIS. Pappus of 5 scarious awn-tipped palece (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. 



* Palea; 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: acaulesceut, with slender scapes and 

 middle-sized or smaller heads. Calais Calocalais, DC. 1. c. 



-) Awn very long in proportion to the palea; of the pappus. 



M. macrochseta, GRAY, 1. c. Subcaulescent : scapes or peduncles sometimes even 2 feet 

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

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

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

 awn. Calais macroc.fucta, Gray, PI. Feudl. 112, & Pacif. R. Rep. iv. 113. S. W. Idaho 

 (Spa/ding), and California along the coast from Sau Francisco (Bigelow) to San Diego 

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



) -t 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 

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



M. linearifolia, GRAY, 1. c. Peduncle more or less thickened upward and in strong plants 

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



