fh-epis. COM PosriMo. 435 



Santa Barbara {NxUtall), and in the southern part of tlic Statn (Coitlkr), to the valley of tlic 

 Gila, Schott. There are no pei-sistent bristles to the pappus, as is wrongly stated in the Botany 

 of the Mexican Boundary. 



§ 3. Pappus wholly tvantinff : otherwise as in Malacothrix proper : flowers white 

 and purple. — Anathrix, Gray. 



11. M. platyphylla, Gray, 1. c. Annual, glabrous or nearly so, somewhat 

 glaucous : leaves ail radical, dilated-cuneilbrm and nearly sessile, almost truncate, 

 acutely and uno(iually dentate or denticulate : scape naked, a i"oot or two liigli, 

 loosely corymbose at Llio summit and l)earing numerous small heads : involucre of 

 oblong eijual scales and a few very short calyculato ones. 



Gravelly soil near Fort Mohave, Dr. Coo])cr. Involucre campanulato, aboiit 3 lines higli : 

 ligulcs of nearly twice that length. Leaves 2 or 3 inciics long, thin, veiny. The fruit is as yet 

 unknown. 



117. CREPIS, Linn. 

 Head several - many flowered. Involucre cylindraceous or campanulate, usually 

 double ; viz. the priucij)al scales equal, with some short calyculate ones at base, 

 rarely more imbricated, in fruit often becoming carinato or boat-shaped towards the 

 base by the thickening and induration of the midrib. Ecceptacle flat, naked, some- 

 times alveolate. Akenes oblong, linear, or fusiform, nearly terete or obtusely 

 angled, 10 - 20-ribbed, generally somewhat contracted at base and more tapering at 

 summit, sometimes even beaked. Pappus simple, of copious and white capillary 

 merely scabrous bristles, which are either persistent or singly deciduous. — Herbs, 

 of various habit and wide distribution (mainly of the northern temperate regions 

 of the Old World), commonly with middle-sized heads of yellow flowers. — Torr. <k 

 (Jray, Fl. ii. 487; Eenth. & Hook. Gen. PI. ii. 511. 



* Minutel;/ ciiiereons-tomeutose : stems clustered from a perenvial mot : leaves lacini- 

 atehj pinnatifid into narrow lobes or teeth: involucre of equal linear principal scales 

 and a few short cali/culate ones: akenes fusiform, not beaked, smooth, lO-striate- 

 rihbed, as long as the pappus. 



1. C. occidentalis, Nutt. Dwarf or stout : stem a span to a foot or so high, 

 few-leavoil, bearing few heads, mostly on thickish peduncles : leaves runcinatoly pin- 

 natifid or pinnately i)arted, broadly lanceolate in outline, with the ape.x acute or 

 rarely prolonged: involucre 12 - 30-flo\vered, furfuraoeous-tomento.se, occasionally 

 beset with scattered and brownish bristles; the princijjal scales 8 to 15: akenes 

 with tapering summit, striate with 10 even and strong narrow ribs. — Psilochenia 

 occidentalis, Nutt. in Trans. Am. Phil. Soc. n. ser. vii. 437. 



Var. Nevadensis, Kellogg, in Proc. Calif. Acad. v. 50, is a dwarf form, Avith 

 finely somewhat twice pinnately parted leaves ; and var. subacanlis, Kellogg, is a 

 much-reduced state of the same. 



Var. COStata, dwarf or stout, with many-flowered heads, has the akenes very 

 strongly ribbed, sometimes hardly narrowed at the summit, sometimes conspiruously 

 narrowed. 



Var. crinita, from "Washington Territory, is shaggy with long brownish or 

 yellowish hairs on the peduncles and involucre ; the bristly hair.s in somewhat 

 similar Californian specimens glandular. 



Pry hillH, from Mendocino Co. and flMoughout iiorthcnstern portions of the Siorni Nevada to 

 Washington Territory, Montaiui, and Colonido. The vur. AVrdr/ivi.t/.v occurs at Sunnnit, Nevada 

 Co., &c. A form of var. cnstnta, Sierra Co., Lrvuiiov. The glandular st.ife of var. crinita, Sicim 

 and Plumas Co., Lcmmon, Mri*. I'ldsifer Avirs. The foliage, heads, and akcucs of this s|>ccipa 

 are not a little variable. Nnttali etiuld have seen no well-formed fruit, for he describes the 

 akencH as not striate. 



