264 COMPOSITE. Lepachys. 



often 2 inches long or more, very much exceeding the at length short-oblong disk : chafpy 

 bracts of the receptacle becoming much corky-thickened at the enlarging summit : ovary not 

 rarely iving-margined ; akenes subcuneate-oblong, the inner margin acute and salient, and 

 produced at summit into a short rounded tooth, which is occasionally aristellate-poiuted. — 

 L. plnnaiijida & L. angustifoUa^ Raf. 1. c. Hudhcckla pinnata, Vent. Cels. t. 71 ; Smith, Exot. 

 Bot. i. t. 38; Bot. Mag. t. 2.310. E. digitata, WiUd. Spec. iii. 2247, excl. syn. M. tomentosa, 

 El]. Sk. ii. 45.3, as to herb., hardly of char. Obeliscarla pinnata, Cass. 1. c. ; DC. 1. c. — Dry 

 prairies, W. Kew York to Michigan and Iowa, south to W. Florida and Louisiana. 



# * Style-tips short and obtuse: rays oval or oblong, mostly shorter than the f railing disk, not 

 rarely particolored with brown purple: akenes commonly witli a scarious and more or less cili- 

 ate margin or sometimes narrow wing to the inner edge: divisions or lobes of the leaves mostly 

 entire. 



- L. Tagetes, Gkat. a foot high, branching, leafy, strigulose-cinereous : leaves thickish, 

 mostly with 3 to 7 narrowly linear rather rigid lobes : heads rather short-peduncled : rays 

 few, a quarter to half an inch long : disk globose to barely oblong, half-inch high : pappus of 

 one or sometimes two subulate or awn-like deciduous teeth, and no intermediate squaniellje. 

 — Pacif. R. Eep. iv. 103. Lepachys columnaris, var. Tagetes, Gray, PI. Wright, i. 106. 

 Rudbeckia Tagetes, James in Long Exped. ii. 68. R. globosa, Nutt. Jour. Acad. Philad. 

 vii. .19, & Traus. Am. Phil. Soc. 1. c. 355. Obeliscaria Tagetes, DC. 1. u. — Alluvial jjlains, 

 Arkansas to AV. Texas and New Mexico; first coll. by James. 



■^ L. columnaris, Toer. & Gk.iy, 1. c. Strigose-scabrous, a foot or two high, branching 

 from the base, terminated by long peduncles bearing a showy head : divisions uf the cauline 

 leaves 5 to 9, from oblong to narrowly linear, sometimes 2-3-cleft : rays commonly an inch 

 long or more, normally all yellow; disk at length columnar aud inch or more long: pappus 

 of the preceding, but usually a series of minute and delicate squamellaa around the broad 

 flat summit. — Rudbeckia columnaris, Pursh, Fl. ii. 575 ; Bot. Mag. t. 1601 ; Hook. El. i. 31 1 ; 

 Sprague, Wild Flowers of Amer., 43, t. 8. Ratibida sulcata, Raf. 1. c. R. columnaris, Don, 

 Brit. Fl. Gard. n. ser. iv. 361. Obeliscaria columnaris, DC. 1. c. — Plains and prairies, Sas- 



_^ katchewan to the Rocky Mountains, and south to Texas and Arizona. 



Var. pulcherrima, Torr. & Gray, 1. c. Differs only in having a part or even the 

 whole upper face of the ray brown-purple ; varies southward into more slender and branch- 

 ing forms, some with rays reduced to a quarter-inch. — Obeliscaria pulcherrima, DC. 1. c. 

 Ratibida columnaris, var. pulcherrima, Don, 1. c. t. 361. — Nebraska to Arizona and Texas. 

 (Adj. Mex.) 



§ 2. Akenes completely flat : style-tips slender-subulate, very hispid : roof 

 probably annual or biennial. — § Lophochcena, Torr. & Gray, 1. c. 



L. pedunoularis, Torr. & Gray. Strigose-scabrous or pubescent and somewhat cinereous, 

 2 or 3 feet high, including the naked peduncle of a foot or more: leaves rather large, 

 irregularly bipinnately parted or pinnately parted and some of the lobes inciscly pinnatifid 

 or toothed, these oblong-linear or broader: rays obovate, an inch or less long and ]nire 

 yellow, or sometimes only quarter-inch long and particolored : disk cyliudrical,"the largest 

 an inch and a half long: akenes broadly and somewhat obliquely obovate, with no nerve or 

 elevation on the face, from narrowly to broadly winged aud squamellate-fimbriato on at least 

 the inner edge, deeply notched at summit by an extension into two chaffv teeth, the inner 

 one large and triangnl.ar-subulate, the outer smaller, and the notch fringed with small irreg- 

 ular squamella). — Fl. ii. 315. — Low ground, Texas, Dnimmond, Wright, &c. 



Var. picta, Gray. Pubescence more cinereous: lea\es simply and lyrately pinnately 

 parted into fewer (5 to 7) divisions; these incised, the larger terminal one ovate-oblong or 

 obovate: rays barely half-inch long, brown-purple with yellow edge: disk becoming inch 

 and a half long. — PI. Wright, i. 107. L. serrata, Biul'dey in Proc. Acad. Philadl'lSei, 

 457. — Texas, near the coast, and in sandy woods, Wright, Buckley, Hall. 



97. WEDELIA, Jacq. (Prof. G. W. Wedel, of Jena, in the latter part of 

 the 17th century.) — Tropical herbs or undershrubs, mostly of sea-shores; with 

 opposite leaves, aud lateral or terminal peduneubite heads uf yellow flowers. 

 One species has reached our southernmost coast. 



