102 COMPOSITE. Eupatorium. 



^^ ^^ Involucre less than 2 lines long; the bracts broader, green externally, 2-3-nerved when 



drv: inflorescence somewhat paniculate ar.d 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 panicu- 

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

 lanceolate, pubernlous, 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. — 

 Isanta Rita Mountains, S. Arizona, along brooks and on dripping rocks, Primjle. 

 =: = = 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, etjual and 

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

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

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

 Graham, Rolhrock (740, 741); Cliiricahua Mountains, Lemmon. Heads larger and fewer 

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

 Fendleri. 



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

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

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

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

 Gonoclinium, DC. Prodr. v. 135. 



E. coelestinuni, L. (Mist-flower.) SomcAvhat pubescent: stems erect, branched at 

 summit : leaves deltoid-ovate or subcordate, obtuse or acutish, obtusely serrate, rarely v.ith 

 some coarser salient teeth, slender-petioled : cymes rather comjiact : receptacle obtusely 

 ■ conical. — Spec. ii. 838 (Dill. Elth. t. 114; Pluk. Mant. t. 394) ; Michx. Fl. ii. 100. Codeslina 

 ccerulea, Spreng. Syst. iii. 446, not Cass. Conocliiiiitm ccdesthmm, DC. I.e. ; Torr. & Gray, Fl. 

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

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

 more branched form, of Florida and Texas, found only on the coast, ap])roaching the var. 

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



E. betonicum, Hemsl. From tomentose-villous to glabrate : stems lax, loo.sely branch- 

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

 ulate cymes : leaves oblong, mostly ol)tuse, in the original form with cordate base, creuate, 

 petioled : receptacle low-conical. — Biol. Centr.-Am. Bot. ii. 93. ConocJhuum betonicum, DC. 

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

 Schntt, a glal)rato fin-m. (Adjacent Mex.) 



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

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

 to nearly glabrous. — Corwlinium bftonicum, var. integrifolium. Gray, PI. Wright, i. 88. Eupa- 

 torium Hartwcgi, Benth. PI. Hartw. 19? — Southern border of Texas, Wright, Bigclow, &c. 

 (Mex.) 



E. Greggii. Minutely pubernlent : 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 laciniate-pinnatifid into narrow lobes : receptacle low-con- 

 ical. — ConocUninni disnectum. Gray, PI. Wright, i. 88; Bot. Mex. Bound. 76. Eiipntwinm 

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

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

 border, Wrigh', &c. (Adjacent Mex., first coll. by Gregg.) 

 E. LtJTEUM, Raf. in Med. Rep. N. Y., is doubtless a false species. E. cr.vssifolidm and 



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



