Evax. COMPOSITE. 229 



yar. petiolata, is comparatively stout and large ; the blade of the leaves 6 to 15 lines long, 

 tapering into petioles of an inch or two in length : the heads in their axils glomerate at the 

 root, therefore stemless (E. acaulis, Greene, in Bot. Gazette, vii. 256), or on the summit of 

 a simple stem or simple branches from the base, an inch or two high. — Psilocarphus cau- 

 lescens, Benth. PI. Hartw. 319. — Gravelly or alluvial soil, California, on the Sacramento, &c, 

 Harticeg, Bigelow, Kellogg, Parry, and others. 



Var. sparsiflora. More caulescent and branching : leaves similar but smaller, rarely 

 inch long (including the slender petiole), scattered on branching stems of at length 2 inches 

 high, none rosulate at the base : heads in their axils accordingly scattered, narrowly ob- 

 long. — Southeastern part of California, San Luis Obispo and San Diego, Brewer, Parry, 

 Cleveland, &c. 



Var. brevif olia. Either depressed and rosulate, or with stems an inch or two high : 

 leaves small and short-petioled, seldom over a quarter to half inch long. — Northern part 

 of the State, Humboldt and Mendocino Co., Bolander, Kellogg, &c. 



Var. minima. A very exiguous form of the preceding variety, in the early and de- 

 pressed state, but tending to be subcaulescent ; the largest leaves barely half-inch long and 

 hardly a line wide. — Stylocline acaule, Kellogg in Proc. Calif. Acad. vii. 112, exceedingly 

 starved specimens, just coming into flower, coll. Dr. Eisen, at Fresno. The whole structure 

 exactly of E. caulescens, and sterile flowers not " single," but 6 or 7, surrounded by 5 to 7 

 firm but not yet enlarging bracts. 



§ 2. Diapekia. Bracts of the involucre thin ; of the female flowers scarious, 

 from oval to oblong-linear, barely concave, at maturity deciduous from the merely 

 convex receptacle ; those of the 2 to 5 staminate flowers (which have an undi- 

 vided style and no ovary) similar or with woolly tips, or partly herbaceous, and 

 somewhat embracing the flowers ; no central prolongation to the receptacle : 

 akenes obcompressed, smooth or very minutely papillose : heads small, aggregated 

 in terminal foliose-involucrate glomerules. — Diaperia, Nutt. Trans. Am. Phil. 

 Soc. vii. 337 ; Benth. & Hook. 1. c. 298, extended. Diaperia & Filaginopsis, 

 Tom & Gray, Fl. ii. 263, 264. 



B. prolifera, Nutt. Bather stout : stem often a span high, simple and erect, or with as- 

 cending branches from the base, bearing numerous small spatulate leaves and a capituliform 

 glomerule (commonly half-inch in diameter), whence proceed 1 to 3 nearly leafless branches 

 similarly terminated, sometimes again proliferous : heads cylindraceous or oblong-fusiform : 

 fructiferous bracts chartaceo-scarious, oval or oblong, mainly naked ; those embracing stami- 

 nate flowers more herbaceous and woolly-tipped, of firmer or more herbaceous texture : 

 staminate flowers each on a filiform stipe representing an abortive ovary : habit of Filago 

 Germanica. — DC. Prodr. v. 459. Diaperia prolifera, Nutt. Trans. Am. Phil. Soc. 1. c. 337 ; 

 Torr. & Gray, Fl. ii. 264. — Dry or exsiccated ground, Arkansas to Texas, Colorado, and 

 north to Dakota ; first coll. by Nuttall. 



E. multicaulis, DC. Diffusely branched from the base, rather slender : capituliform 

 glomerules much smaller and less foliose-involucrate : leaves oblanceolate or spatulate (3 or 

 4 lines long) : heads globular or ovoid (only a line or two in diameter) : involucre and apex 

 of the receptacular bracts densely implexed-lanate ; those of the female flowers narrowly 

 oblong, of the male spatulate; these sessile without vestige of ovary. — Prodr. v. 459. Fila- 

 ginopsis multicaulis, Torr. & Gray, 1. c, & Pacif. R. Bep. ii. t. 3. Micropus minimus, DC. 1. c. 

 461, a depauperate form. Diaperia multicaulis, Benth. & Hook. Gen. ii. 298. — Low or ex- 

 siccated alluvial ground, common from Texas and the borders of New Mexico even (coll. 

 Lemmon) to the Mohave Desert in S. E. California. (Adj. Mex., Berlandier, Gregg.) 



Var. Drummondii. A slender form, commonly with some long woolly hairs on the 

 limb or on the tube of the staminate corollas. — Filaginopsis Drummondii, Torr. & Gray, 

 1. c. Diaperia Drummondii, Benth. & Hook. 1. c. — E. Texas and Louisiana, in moist ground, 

 Drummond, Hale, &c. 



§ 3. Calymmandra. Bracts of the simple involucre and of the female flowers 

 mostly scarious, narrowly spatulate-oblong, plane, externally villous-lanate ; of 



