Evax. COMPOSITE. 229 



var. PETiOLATA, is comparatively stout aud large ; the blade of the leaves 6 to 15 Hues long, 

 taperiug iuto petioles of an inch or two iu length : the heads in tlieir axils glomerate at the 

 root, tlierefore stemless [E. acan/is, Greene, iu 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- 

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

 Hartweg, Bigeloiv, Kellogg, Parry, and othei's. 



Var. sparsiflora. More caulesceut 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 aud San Diego, Brewer, Parry, 

 Clci'eland, &c. 



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

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

 of the State, Humboldt and Mendocino Co., Bolamler, 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. — Stylodine acatik, Kellogg in Proc. Calif. Acad. vii. 112, exceedingly 

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

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

 firm but not yet enlarging bracts. 



§ 2. DiAPERiA. 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, 

 Torr. & Gray, Fl. ii. 2G3, 2G4. 



E. prolifera, Nutt. Rather stout: stem ofteu a span high, simple and erect, or with as- 

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

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

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

 fructiferous bracts chartaceo-searious, oval or oblong, mainly naked ; tliose embracing stami- 

 nate flowers more herbaceous aud 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 Nnttnll. 



E. multicaulis, DC. Diffusely branclied 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 aud 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. Rep. 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 Mfjliave Desert in S. E. California. (Adj. Mex., Berlandicr, Gregg.) 



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

 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. CALYMMiNDRA. Bracts of the simple involucre and of tlie female flowers 

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



