264 COMPOSITE. Lepachys. 



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

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

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

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

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

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

 Ell. Sk. ii. 453, as to herb., hardly of char. Obeliscaria 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 purple : akenes commonly with 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. TclgetGS, 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 : pappus of 

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

 Pacif. R. Hep. iv. 103. Lepachys columnaris, var. Tanetes, Gray, PI. Wright, i. 10(5. 

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

 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-cleft : 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 squamellae around the broad 

 flat summit. Rudbeckia columnaris, Pursh, Fl. ii. 575; Bot. Mag. t. 1601 ; Hook. Fl. i. 311 ; 

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

 Brit. Fl. Gard. u. 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. 

 Ratibidd columnaris, var. pulcherrima, Don, I.e. t. 361. Nebraska to Arizona and Texas. 

 (Adj. Mcx.) 



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

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



L. pecluncularis, TORR. & GRAY. Strigose-scabrous or pubescent and somewhat cinereous, 

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

 irregularly bipinnately parted or pinnatcly 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-fimbriate on at least 

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

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

 ular squamellae. 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 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, Buckley in Proc. Acad. Philad. 1861, 

 457. Texas, near the coast, aud 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. 



