Coreopsis. COMPOSITE. 289 



winged and with short setiform awns ; the outermost often awuless and pubescent, some- 

 times rugose and tliick-wiuged. — Ximenesia enccliotdes, Cav. Ic. ii. 60, t. 178; DC. Prodr. 

 V. 627 (under several varieties) ; Torr. & Gray, 1. c. Pallasia scr rat if alia, Smith in Rees 

 Cycl. — Low grounds, Texas and S. Cok)rado to Arizona: also Florida, wliere it was jjrob- 

 ably introduced. Now widely dispersed in warm regions and cult. (Mex.) 



110. ACTIN6MERIS, Nutt., partly. (From d/crt?, a ray, and yLtept?, 

 a part.) — Tall perennials, of the Atlantic U. S. ; the somewhat sim2ile stems 

 (4 to 8 feet high) leafy to the top, below mostly winged in the manner of 

 Verhesina by decurrent prolongations from the base of the leaves ; these alter- 

 nate or some lower ones occasionally opposite, lanceolate or broader, acuminate 

 at both ends, pinnately veined, serrate, thinnish : heads loosely corymbose- 

 paniculate : flowers yellow or white, produced in late summer. — Gray, Proc. 

 Am. Acad. xix. 11. Actinomeris, spec. 1, Nutt. Gen. ii. 181, & § 1, 2, Torr. & 

 Gray, Fl. ii. 33.5. 



A. squarrosa, Nutt. 1. c. Heads with 2 to 8 irregular yellow rays; disk-flowers yellow: 

 involurral bracts linear to narrowly spatulate : akeues mostly witli broad and firm wings : 

 pappus of 2 or in marginal akeues 3 awns. — Ell. Sk. ii. 413 (excl. var. alhn) ; Torr. & Gray, 

 1. c. (forms alternifulia and oppositifolia, the latter of rare occurrence) ; Meehan, Nat. Fl. 

 i. t. 39. A. alternifolia, DC. Prodr. v. 575. A. oppositifolia, Fresenius, Ind. Sem. Hort. 

 Francf. 1836, an occasional form. Coreopsis alternifolia, L. Spec. ii. 909 ; Jacq. Hort. Vind. 

 t. 110. C.procera, Ait. Kew. iii. 258. C. acuta, Pursh, Fl. ii. 569? Verhesina Coreopsis, 

 Michx. Fl. ii. 134. — Rich or alluvial soil, either moist or dry, W. New York to Iowa, south 

 to Florida and Louisiana. Wholly wingless-stemmed specimens occasionally occur. 



A. alba, Torr. & Gray, 1. c. Rather smoother : lieads smaller : rays none ; disk-flowers dull 

 white : akeues oftener wingless or narrowly winged : awns of tlie pappus not rarely 3 or 4, 

 and commonly some interposed small ones or aristellate squamellaj ! — A. squarrosa, \&r. 

 alba, Nutt. 1. c. ; Ell. 1. c. A. alternifolia, var. alba, DC. 1. c. Athanasia paniculata, Walt. 

 Car. 201. Verbesina Coreopsis, var. aiha, Michx. 1. c. — Alluvial soil, S. Carolina to Louisi- 

 ana, near the coast : rare in herbaria. Specimens from Dr. Mellichamp, S. Carolina, all 

 exhibit the squamcllate-aristellate jiappus, not before known in this genus. 



111. S YNEDR^ILL A, Gasrtn. (SweSpia, a sitting together, the heads in 

 the original species being collected at the nodes.) — Tropical annuals ; with branch- 

 ing stems, opposite and more or less serrate jietioled leaves, and small heads of 

 yellow flowers, the rays short. — Fruct. ii. 450, t. 171; Hook. Exot. Fl. t. 60. 

 SynedreUa^ Oligogyne in part, & Gcdyptrocarpus (Less.), DC. Prodr. v. G29. 



S. vialis, Gray. Diffuse or procumbent, slender, strigulose-hirsute or more hairy : leaves 

 ovate, about inch long : heads only 3 lines long, solitary or scattered, some subsessile, others 

 slender-peduncled : principal bracts of the involucre 4 or 5, ovate or oblong: rajs 5 to 8, 

 witli oblong exserted ligule : akeues or many of them tuberculate-scabrous at maturity, 

 some of the outer occasionally trigonal, mostly flattened, and with or more commouly with- 

 out a coriaceous and thickish undulated wing-like border, the central ones narrower and 

 marginless : pappus of 2 or sometimes 3 rigid diverging awns, with occasionally one or two 

 additional teeth or squamelhc, arising from an obscure border. — Proc. Am. Acad. xvii. 217. 

 Cahjptrocarpus vialis. Less. Syn. 221, & Linn. ix. 269. Oligogyne Tampicana, DC. Prodr. v. 

 629; Deless. Ic. Sel. ix. t. 38; Gray, PI. Wright, i. 111. Zexmenia hispidula, Buckley in 

 Proc. Acad. Philad. 1861, 458. — Waysides aud waste grounds, southern borders of Texas. 

 (Mex., S. Am. ?) 



112. C0RE6PSIS, L. Tickseed. (Ko'pt?, a tick, and oi/^t?, resem- 

 blance, from the form of the akene.) — Herbs, mostly Eastern North American 

 and opposite-leaved, of various habit ; with pedunculate heads terminating the 

 branches ; the rays commonly showy, yellow, particolored, or sometimes rose- 



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