264 COMPOSITE. Lepachys. 



often 2 inches long or more, very mnch exceeding the at length short-ohlong disk : chaffy 

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

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

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

 L. plnnatijida & L. anrjastiJbHa, Raf. 1. c. Rudberkia pinnata, Vent. Cels. t. 71 ; Smith, Exot. 

 Bot. i. t. 38 ; Bot. Mag. t. 2310. R. digitata, Willd. Spec. iii. 2247, excl. syn. R. tomentosa, 

 Ell. Sk. ii. 453, as to herb., hai'dly of char. Ohcliscaria pinnata, Cass. 1. c. ; DC. 1. c. — Dry 

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



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

 rarely particolored with brown pur])le : akenes commonly with a scariuus and more or less ciH- 

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

 entire. 



L. Tagetes, Gray, 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 : pajipus of 

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

 — Pacif. R. Rep. iv. 103. Lepachys columnarls, var. Tagetes, Gray, PL Wright, i. 106. 

 Rndhedda Tagetes, James in Long Exped. ii. 68. R. globosa, Nutt. Jour. Acad. Pliilad. 

 vii. 19, &. Trans. Am. Phil. Soc. 1. c. 355. Obeliscaria Tagetes, DC. 1. c. — Alluvial plains, 

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



L. columnaris, Torr. & Gray, 1. c. Strigose-scabrous, a foot or two high, branching 

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

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

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

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

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

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

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

 katchewan to tlie 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, Ya,v. pulcherrima, Don, I.e. t. 361. — Nebraska to Arizona and Texas. 

 (Adj. Mex.) 



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

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



Li. peduncularis, 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 incisely pinnatifid 

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

 yellow, or sometimes only quarter-inch long and particolored : disk cylindrical, 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 and squamellate-firabriate on at least 

 the inner edge, deeply notched at summit b}' an extension into two chaffy teeth, the inner 

 one large and triangular-subulate, the outer smaller, and the notch fringed with small irreg- 

 ular squamella?. — Fl. ii. 315. — Low ground, Texas, Drummond, Wright, &c. 



Var. picta, Gray. Pubescence more cinereous: leaves simply and lyrately pinnately 

 parted into fewer (5 to 7) divisions; these incLsed, 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. serrala, Buckley in Proc. Acad. Philad. 1861, 

 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, and lateral or terminal pedunculate heads of yellow flowers. 

 One species has reached our southernmost coast. 



