102 COMPOSITE. Eupatorivm. 



= = Involucre less tban 2 lines long; the bracts broader, green externally, 2-3-nervcd when 

 drv: inflorescence somewhat paniculate and leafy. 



E. pauperculum, GRAY. A foot or two high, nearly glabrous: leaves ovate-lanceolate 

 (mostly inch long), roundish at base, obtusely serrate, on rather short slender petioles : 

 heads 25-flowered, small (2 lines high), few in the numerous small cymes, which are pauicu- 

 latelv disposed, terminating short leafy branches: bracts of the involucre 10 or 12, oblong- 

 lanceolate, puberulous, little over half the length of the white flowers : corolla-lobes slightly 

 hirsute outside or becoming naked : pappus soft and white. Proc. Am. Acad. xvii. 205. 

 Santa Rita Mountains, S. Arizona, along brooks and on dripping rocks, Priwjle. 

 = = = Heads comparatively large and few in the cymes, 25-35-flowered: involucre 3 or 4 

 lines high, rather broad. 



E. Rothrockii. Glabrous (or peduncles somewhat pubescent) : stems a foot or two high, 

 simple or brachiately branched above : leaves bright green, ovate or deltoid-ovate, usually 

 acuminate, coarsely and sharply serrate, sometimes irregularly or doubly serrate, and the 

 teeth tipped with a callous gland (the larger 2 inches long, with petiole half-inch or less, 

 smaller in depauperate plants nearly sessile): bracts of the involucre 15 to 17, equal and 

 similar, linear-lanceolate, mostly acute, glabrous, when dry pale and somewhat scarious and 

 conspicuously 2-3-uerved, nearly equalling the white and soft barbellulate-scabrous pappus : 

 corolla-lobes rather strongly bearded externally. Mountains of S. Arizona : on Mount 

 Graham, Rot/irock (740, 741) ; Chiricahua Mountains, Leminon. Heads larger and fewer 

 than in the Mexican E. grandidentatum, DC.; the involucre not imbricated as in E. 

 Fendl< ii. 



3. CONOCLINIUM, Benth. Receptacle of the flowers conical or hemispherical : 

 otherwise as in the Exinibricata subsection of the preceding : habit of Ageratum 

 Gcdestina: flowers blue or violet (sometimes white), sweet-scented: bristles of 

 the pappus rather scanty in a single series : leaves opposite : perennial herbs. 

 Conodinium, DC. Prodr. v. 135. 



E. ccelestinum, L. (MIST-FLOWER.) Somewhat pubescent: stems erect, branched at 

 summit: leaves deltoid-ovate or subcordate, obtuse or acutish, obtusely serrate, rarely \viUi 

 some coarser salient teeth, sleuder-petioled : cymes rather compact: receptacle obtusrly 

 conical. Spec. ii. 838 (Dill. Elth. t. 114; Pluk. Maut. t. 394) ; Michx. Fl. ii. 100. Cakstina 

 cccrulca, Spreng. Syst. iii. 446, not Cass. Conodinium ccdestinum, DC. 1. c. ; Torr. & Gray, Fl. 

 ii. 92. Moist shady ground, New Jersey to Florida and Texas, and west to Arkansas and 

 Illinois. Conodinium dichotomum, Chapm. in Bot. Gazette, iii- 5, appears to be a lax and 

 more branched form, of Florida and Texas, found only on the coast, approaching the var. 

 sutimnn, Griseb. Cat. Cub. 146. (Cuba.) 



E. betonicum, HEMSL. From tomentose-villous to glabrate : stems lax, loosely branch- 

 ing : branches naked and pedimculiform at summit, bearing some small corymbose or panic- 

 ulate cymes : leaves oblong, mostly obtuse, in the original form with cordate base, crcnate, 

 petioled : receptacle low-conical. Biol. Centr.-Am. Bot. ii. 93. Conodinium bchwicuni, DC. 

 Prodr. v. 135 ; Gray, Bot. Mex. Bound. 76. Southern border of Texas on the Rio Grande, 

 Schoft, a glabrate form. (Adjacent Mex.) 



Var. subintegrum. Leaves sometimes truncate, commonly obtuse or cuneate at 

 base, obscurely crenate, denticulate, repand or entire, from villous or cinereous-tomentulose 

 to nearly glabrous. Conodinium betonicum, var. hitri/rifo/hiin, Gray, PI. Wright, i. 88. Eiipa- 

 torium Hartweyi, Benth. PL Hartw. 19? Southern border of Texas, Wright, Bigelow, &c. 

 (Mex.) 



E- Greggii. Minutely puberulent : stems erect, a foot or two high, bearing one or few 

 small and dense cymes at the naked pedunculiform summit : leaves nearly sessile, palmately 

 3-5-cleft or parted ; the divisions laciuiate-pinnatifid into narrow lobes : receptacle low-con- 

 ical. Conodinium dissectum, Gray, PI. Wright, i. 88; Bot. Mex. Bound. 70. Eupntorinm 

 dissectum, Gray, Proc. Am. Acad. xviii. 100 (name only), not Benth. Bot. Sulph. 113, 

 with which Hemsley has confounded it. Low ground, S. Texas to Arizona near the Mexican 

 border, Wrir/ht, &c. (Adjacent Mex., first coll. by Grei/g.) 

 E. LtfxEUM, Raf. in Med. Rep. N. Y., is doubtless a false species. E. CRASSIFOLIUM and 



E. viOLAcEUM, Raf. Fl. Ludov., are fictitious, as are all the species of that work. 



