Stevia. COMPOSITE. 91 



Var. scaberrima. Leaves mostly short and sparsely denticulate or toothed, from 

 liuear to obluug-lauceulate, scabrous to rough-liispidulous above : bracts of the iuvolucre or 

 some of them produced iuto long and loose or spreading subulate or filiform tips. — Torr. & 

 Gra3% 1. c. V. scaberrima, Nutt. Gen. ii. 134; Ell. 1. c. — South Carolina to Florida. 



Var. Texana. Stem virgate, rather tall : lower leaves large, lanceolate (3 to 6 inches 

 long) ; upper ones small, linear or subulate : cyme naked : bracts of the involucre all point- 

 less or merely mucronate. — Torr. & Gray, 1. c, character, without name. — Pine woods, 

 Arkansas, Louisiana, and Texas. 



Var. pumila, Chapm. Glabrous and hardly at all scabrous, even the leaves; these 

 small, mostly liuear and entire : stem slender, a span to 18 inches high : cyme of few heads : 

 bracts of the involucre pointless. — Bot. Gazette, iii. 5. — Wet pine barrens, S. E. Florida, 

 Blodgett, Garber. 



++++++++ Leaves with revolute entire margins, not scabrous, veinless, lanose beneath. 

 V. Lindheimeri, Gray & Engelm. About a foot high, excessively leafy up to the corym- 

 biform cyme, lanose-canescent, even to the ol^tuse and pointless bracts of the involucre : 

 leaves narrowly linear (Ij to 3 inches long, a line or two wide), glabrate and green above ; 

 heads all pedunculate: akenes glabrous: pappus purple. — Proc. Am. Acad. i. 46, & PI. 

 Liudh. ii. 217. — Eocky hills and plains, W.Texas, Lindheimer, Wri(/ht, &c. Berlandier 

 collected an apparent hybrid between this most distinct species and V. Baldwinii. 

 # * Outer pappus inconspicuous and rather setose than squamellate: cauline leaves few and small. 

 V. oligophylla, Mkhx. Minutely scabrous-pubescent : stem about 2 feet high, slender, 

 bearing a few lieads in a very loose naked cyme : radical leaves ample (4 to 8 inches long) 

 in a rosulate tuft, oblong ; cauline lanceolate, few and small, the uppermost reduced to 

 subulate bracts ; all veiny and denticulate: heads 15-30-flowered : bracts of the involucre 

 subulate (mostly from a broad base), loose : bristles of the pappus slender: akenes hirtellous 

 on the ribs. — Fl. ii. 94 ; DC. Prodr. v. 62 ; Torr. & Gray, Fl. ii. 57. Serratida Carolinensis, 

 r3ill. Elth. t. 261. Chri/socoma acaulis, Walt. Car. 196. — Low pine barrens, N. Carolina to 

 Florida, near the coast. — Varies with foliage soft cinereous-pubescent : S. Carolina, J. 

 Donnell Smith. 



Tribe II. EUPATORIACE^, p. 50. 



4. STEVIA, Cav. {Dr. Pedro Esteve.) — Herbs, rarely suffrutescent plants ; 

 with mostly opposite and triplinerved leaves, small and narrow heads usually 

 corymbosely crowded in terminal naked cymes or fascicles, and flowers white or 

 rose-purple : pappus variable ; the awns when present barbellate-scabrous. — 

 A large Mexican genus (a few species reaching our borders), also well developed 

 on the eastern side of South America in corresponding latitudes. — Cav. Ic. iv. 

 32, t. 354-356 ; Schultz Bip. in Linn. xxv. 268. 



# Branches and heads paniculate, loose: root annual. 



S- micrantha, Lag. Pubcmlent and somewhat viscid: stem slender, a foot or two high, 

 hearing short flowering branches almost from the base : leaves thin, ovate with subcuneate or 

 rarely subcordate base, serrate (inch long), petioled : heads pedicellate in the loose clusters, 

 3 and 4 lines long : pappus of 3 awns with short paleaceous-dilated base, or in one or two 

 flowers occasionally awnless. — Elench. Hort. Madrid, 1815, & Nov. Gen. & Spec. 27. 

 •S. maceUa, Gray, PI. Wright, ii. 70. — Shady cliffs. New Mexico, Wri(jld. Southern Arizona, 

 Lemmon, by which is generally meant Mr. J. G. and Mrs. Sara Plumvier Leinmon, associates 

 in exploration. (Mex.) 



* * Heads loosely cymose-paniculate and pedunculate : root perennial. 



S. amabilis, Lemmon. Stem slender and virgate, or with long virgate branches, about 2 

 feet higli : leaves all alternate, linear with narrowed base, or the lowest oblanceolate, entire, 

 thinnish : involucre slender, glandular-viscid : flowers purple : pappus of 5 long awns and 

 with extremely short (broader than long) intermediate paleoi. — Gray, Proc. Am. Acad. 

 xix. 1. — Plains near Cave Canon, S. Arizona, Lemmon. 



