Hdianthus. COMPOSITE. 275 



diffusus. H. scaberrimus, EU. Sk. ii. 423. H. Missouriensls (Sclnveinitz) & H. crassifolius, 

 Xutt. Trans. Am. Phil. .Soc. 1. c. Harpalium rigidum, Cass. Diet. Sci. Xat. xx. 200; DC'! 

 Prodr. V. 583, founded on the form witli intermediate palese to the pappus. Plains and 

 prairies, Saskatchewan and Michigan to \V. Georgia, Texas, and eastern part of Colorado. 

 Sometimes the disk-coroUas are at first yellow ! 



++ ++ Disk yellow. (Here the Califomian H. gracHentvs would be sought.) 



■ H. laetiflorus, Pees. Resembles taD forms of the preceding, similarly scabrous or hispid, 

 leafy: leaves commonly thinner, mostly oval-lauceolate, acuminate at both ends, 4 to 10 

 inches long, more or less serrate : heads usually several and rather short-peduncled : disk 

 half-inch high: bracts of the involucre imbricated in only 2 or 3 series, from ovate- to 

 oblong-lanceolate, acuminate 'or attenuate-acute, hirsutely ciliate or ciliolate, occasionally a 

 little hirsute on the back: rays numerous, the larger inch and a half long. — Svn. ii. 476; 

 DC. Prodr. v. 586, excl. syn. Ell. ; Torr. & Gray, 1. c. H. atrorubens, Lam. Diet. iii. 86, not 

 L. — Prairies and barrens, Indiana, Illinois, Wisconsin. 



Var. tricuspis, Torr. & Geat, 1. e. Leaves less serrate : chaff of receptacle more 

 commonly 3-toothed. — i7. (ncMS/jjs, EU ^k. ii. 422. AV. Georgia, ex ^///off. Needs confir- 

 mation. 



'H. pumilus, XcTT. Hispid and scabrous throughout: stems simple, a foot or two high, 

 bearing 5 to 7 pairs of leaves and a few rather short-peduncled heads : leaves mostly ovate- 

 lanceolate, acute, entire or nearly so (!■} to 4 inches long), rigid, abruptly contracted at base 

 into a short margined petiole : involucre less than half-inch high, white-hirsute or scabro- 

 hispidulous; its bracts imbricated'in about 3 series, oblong-lanceolate, acutish : rays about 

 inch long. — Trans. Am. Phil. Soc. vii. 366; Gray in Am. Jour. Sei. ser. 2, xxxiii. 2.39. — 

 Eastern Rocky Mountains and adjacent plains of the Platte, &c., from Wyoming to Colorado, 

 \utlaU, ffai/den, Gei/er, Parry, Hall & Harbour, &e. 

 H. OCCidentalis, Riddell. stem slender, 2 or 3 feet high, sometimes smooth and gla- 

 brous, usually leafy only at and near the base : radical and lo^xest cauline leaves ovate to 

 lanceolate-oblong, entire or denticulate, contracted at base into long margined petioles, 

 minutely hirsute or hispidulous, moderately scabrous ; upper cauline a few remote pairs, sub- 

 sessile, lanceolate, and bract-like, of an inch or half-inch in length : heads few or sometimes 

 solitary, small : bracts of the involucre ovate to lanceolate, acute or acupinate, glabrous, or 

 the margins sometimes ciliate, sometimes naked : rays half-inch to nearly inch long ; akenes 

 when young and at summit pubescent. — Suppl. Cat. Ohio PI. (1836), 13 ; Torr. & Gray, Fl. 

 ii. 323. H. heterophyllus. Short, Cat. Kentucky PL Suppl. 3 ; Hook. Comp. Bot. :Mag. i. 98, 

 partly, not Xutt. — Prairies and oak barrens, in dry ground, Michigan to Kentucky and 

 Missouri. 



Var. plantaglneus, Tore. & Gray, 1. c. Minutely puberulent and slightly or not 

 at all scabrous : leaves rather more rigid : involucre obscurely cOiolate or naked. — Texas, 

 Drummond , Lindheimer, Wrirjht. (Adj. Mex.) 



Var. Do'wellianus, Torr. & Gray. Like the preceding, but leafy to the middle or 

 higher, the lea\"es larger and mostly ovate, and stem sometimes branching. — 11. ii. 504. 

 H. Dowellianns, Curtis in Am. Jour. Sci. xliv. 82. — Mountain region in the southwestern 

 part of Xorth Carolina, Curtis, Buckley, &c. 



* * * Involucre looser and the bracts di.sposed to be move taper-pointed, or elongated, or foli- 

 aceous (closer and shorter in some species) : disk except for the dark auther.'i yellow or 

 3'ellowish. 



•f— Canescent or cinereous, at least the foliage, with soft and fine appressed (but not tomentose) 

 pubescence: leaves all opposite, sessile, merely serrulate: heads middle-oized : bracts of the in- 

 volucre imbricated; their attenuate tips seldom or little surpassing the disk: Atlantic species. 



H. cinereus, Torr. & Gray. A foot or two high, barely cinereous throughout with 

 minute and slightly scabrous appressed pubescence : stem simple, somewhat equably leafy, 

 bearing one or two slender-peduncidate small heads : leaves coriaceous, lanceolate-oblong, 

 acute ; lower (3 inches long) contracted into a rather long narrowed base : ujipermost (about 

 inch long) ovate-lanceolate with a broad sessile base : involucre half -inch high ; its bracts 

 lanceolate-subulate, canescent: rays 10 or 12, two-thirds inch long. — Fl. ii. 324, excl. var. 



Texas, Drummond. Heads little larger than those of H. occidentalis, of which it may be a 



hj-bn'dized offspring. 



