Zinnia. COMPOSIT^E. 253 



§ 2. Leaves attenuate to both ends and short-petioled ; their axils triply spi- 

 niferou^. — § Acaiif/iii.ra/it/titi/ii, DC. 



"~X. si'iN(3sc>f, L. A foot or two high, much brauched: leaves orate-lanceolate with cuLeate 

 base, the larger 3-lobeil or incisely piiinatifitl, glabrate and green above, white-tomentose 

 beneath : axils bearing long and slender 3-parted yellow spines : fertile involncre, solitary 

 or few ill upper axils, cylindraceous, half-inch long, obtuse, armed with short weak prickles, 

 inconspicuously 1-2-beaked or pointless. — Lam. 111. t 655, f. 4 ; UC. 1. c. — A weed of 

 S. ^Vtlantic States and Pacific coasts, occasionally about seaports northward to ilassachnsetts. 

 (Xat. from Trop. ^Vm.) 



84. ZINNIA, L. (Dr. J. G. Zinn. of Gottinjrfn, who fii;ured the original 

 species as a JiniJh,-rlia.) — American, chiefly Mexican, herbs or suffiiiticulose 

 plants ; with opposite and mostly sessile entire leaves, single heads terminating 

 tlie branches, and showy flowers, the bright-colored rays long enduring: fl. sum- 

 mer.— Gen. ed. fi, 4.37 ; GcTrtn. Fruct. t. 172 ; Gray, PI. AVri-ht. i. lO.j. Zuiala 

 & DqAothrlx, DC. Prodr. v. .334:, Gil. 



§ 1. EuziXMA. Ilrrlis, mostly annual (.some species perennial) : leaves from 

 ovate to linear : ray-flowers several or numerous, usually without pappus. — PI. 

 ■\Vright. 1. c. 



~ Z. pauciflora, L. Erect annual : leaves from lanceolate to oblong-ovate, commonly with 

 sulicunlate liase, scabrous: peduncle sometimes enlarging and hollow: involucre narrow- 

 campanulate : ligules from obovate to narrowly spatulate, red, purple, or yellow : akenes of 

 the disk 1-awned, sometimes with a rudiment of a, second awn or tooth. — AVebb, Spic. 

 Gorg. 141. Z. pauciflora & Z. multiflora, L. Spec. ed. 2, 1269 (L. f. Dec. t. 12), Z. tenni- 

 flora, .Jacq. Ic. liar. t. 590, with narrow ligules. Z. revoluta, Cav. Ic. iii. 251. Z. hptopoda 

 fcprobaljly Z. bicuspis, UC. Prodr. v. 5.35. Z, intermedia, Engelm. Bvt. Wisliz. 23. — Lou- 

 isiana to Texas, but probably introduced, .Viizona, apparently indigenous. (Jlex., S. Am., 

 and now widely dispersed.) 



§ 2. DiPLOTHEix. SufEruticulose and tufted perennials : leaves narrow and 

 rigid, connate-sessile, usually crowded: ray-flowers commonly few, and their 

 akenes 2-4-aristate : head conspicuously pedunculate only in Z. juniperifolia. — 

 PL Wri-ht. 1. c. Diplothrlx, DC. 



# Ligules shorter than or little surpassing the disk, sometimes wanting: stems mainly herbaceous. 

 — § Heterotjyne, Gray, PI. "Wright. 1. c. 



Z. anomala, Grat. Srabrous-liispid: stems or branches very numerous from a ligneous 

 base and root, 4 to 8 inches high : leaves linear (half-inch to inch long, lr-<s than 2 lines 

 wide), one-nerved, obscurely 3-ner\ed at base : pedimcle shorter than the uppermost leaves : 

 involucre oblong or campanulate (half-incli long) : ligules 4 to 6, oval or oblong, 1 to 3 lines 

 long, veUow or orange, occasionally the whole corolla wanting : hispid style-branches of the 

 disk-flowers acuminate-subulate. — PI. ^Vright. i. 106, t. 10, & il. 86.— S, ■\^'. Texas, \Vri<jht. 

 (Mex. near Saltillo, Palmer, with broader involucre.) 



* * Ligules (4 or 5) ample, dilated-obovate or roundish, at maturity much surpassing the disk, 

 light yellow or sulphur-color, becoming white in age : involucre narrow : stems or branches a 

 span or more high from the stout woody base or branching caudex. 



JZi. grandiflora, Xutt. Scabro-hispidulous : leaves linear, 3-nerved at base: involucre 

 usually 4 lines long: liTules at maturity 5 to 8 lines long : style-branches of the disk-Howers 

 attenuate-subulate. — Trans. Am. Phil. Sue. n. ser. vii. 348 ; Torr. & Gray, PI. ii. 298 ; Torr. 

 ia Emory Eep. t. 4 (style incorrect) ; Gray, 1. c. — Plains and bluffs, E. Colorado to S. W. 

 Texas and Arizona. 

 Z. pilmila, GE.iT. Cinereous-puljerulent : leaves very narrowly linear (hardly half-line 

 wide, half-inch or less long), one-ner^-ed ; involucre 2 or 3 lines long, and ligules 2 to 4 lines : 

 style-branches of disk-flowers -vWth short triangular-subulate tips. — PI. Fendl. 8 1 , PI. A^' right. 

 1. c. — High plains and table-lands, S. W. Texas to Arizona. (Adj. Mex.) 



