302 COMPOSITE. Thelespcrma. 



T. gracile, GRAY, 1. c. More rigid, a foot or two high from a deep perennial root, less 

 branched, naked above : leaves once or twice 3-5-nately divided or parted into filiform-linear 

 or broader lobes, or some upper ones filiform and entire : bracts of the outer involucre 4 to 6, 

 very short, ovate or oblong ; of the inner one connate to above the middle, the edges of their 

 lobes slightly scarious : disk mostly yellow, scarcely brownish after authesis : akenes less 

 papillose or roughened, the breadth of the summit exceeded by the subulate awns : rays 

 usually none, rarely present and 2 or 3 lines long. Bidens gracilis, Torr. Ann. Lye. N. Y. 

 ii. 215. Cosmidium gracile, Torr. & Gray, 1. c. Plains, Nebraska and Wyoming to 

 W. Texas and Arizona. (Adj. Mex.) 



* * Lobes of disk-corollas from ovate to oblong, decidedly shorter than the cylindraceous throat; 

 the proper tube also shorter than in the foregoing: pappus shorter and more coroniform, desti- 

 tute of retrorse bristles or hairs, or wanting. 



-I Leafy-stemmed, branching, herbaceous to the ground: style-appendages subulate-tipped. 



T. SUbsimplicifolium, GRAY. Stems slender, rigid, 1 to 3 feet high: leaves sometimes 

 all entire and filiform (14- to 3 inches long), sometimes 3-5-parted into filiform entire lobes : 

 outer bracts of the involucre oblong to linear, short : rays half-inch long : akenes short- 

 fusiform : pappus 2 minute slightly hairy teeth, or obsolete. Bot. Mex. Bound. 90. T. sim- 

 plicifolium, Gray, Kew Jour. Bot. 1. c. Cosmidium simplicifolium, Gray, PI. Fendl. 86. 

 Rocky prairies, Texas to Arizona. (Adj. Mex.) 



-1 -) Low, branching from a lignescent base, very leafy below, sending up long and naked or 

 scapiform peduncles: outer involucre short ami small: aUenes fusiform, more incurved at 

 maturity. 



T. SUbnudum, GRAY. Rather stout: leaves thickish and rigid, once or twice ternately 

 parted into linear or lanceolate lobes: peduncles 4 to 10 inches long: head rather large 

 (half-inch high) : rays sometimes none, sometimes ample (the larger two-thirds inch long 

 and over half-inch wide) : style-appendages subulate-tipped : pappus a minute 4-5-toothed 

 naked crown, or obsolete. Proc. Am. Acad. x. 72. Includes also T. subsimplirifolium, var. 

 xraposum, Gray, coll. Parry, &c. New Mexico, S. Utah, and N. Arizona, Palmer, Parry, 

 Ward. Also apparently Green River, Wyoming, Parry, a plant referred to T. >jracile. 



T. longipes, GRAY. Fastigiately much branched at the woody base, very leafy: leaves 

 3-5-parted into filiform divisions which are usually no wider than the rhachis : peduncles 

 filiform, wholly simple, 5 to 10 inches long: head small (quarter-inch high), rayless : style- 

 appendages tipped with a very short cone : akenes barely 2 lines long, arcuate at maturity, 

 falling free from the chaff: pappus quite obsolete. PI. Wright, i. 109; Rothrock in 

 Wheeler Rep. vi. 164. Dry hills and banks, W. Texas and Arizona, Wright, Rothrock (not 

 showing the woody stems), Lemmon. (Mex., Schaffner.) 



118. BALDWfNIA, Nutt., in the form of Balduina. (Dr. Wm. Baldwin, 

 collaborator with Elliott, died early.) Apparently biennials or annuals (of S. 

 Atlantic States), mostly glabrous or minutely puberulent ; with alternate entire 

 leaves, puncticulate in the manner of Helenium and veinless, and solitary or corym- 

 bosely paniculate heads of yellow flowers, or those of the disk sometimes purplish- 

 tinged : fl. late summer and autumn. --Nutt. Gen. ii. 175; Ell. 8k. ii. 447; 

 Benth. & Hook. Gen. ii. 391. Bcddwinia and Actinospermum (Ell.), Torr. & 

 Gray, Fl. ii. 388. (True affinity rather with the Helcnioidece.} 



B. uniflora, NUTT. 1. c. Stem rather stout, simple or simply branched, 1 to 3 feet high from 

 a perhaps " perennial " root, with terminal usually elongated peduncle bearing a solitary 

 large head : leaves obtuse, spatulate, or the upper linear : bracts of the involucre numerous, 

 in about 4 series, thickish, at first appressed : rays 20 to 30, cuneate-linear, 3-toothed at 

 truncate apex, inch or more long : concreted chaff of receptacle truncate : akenes cylindra- 

 ceous-obconical, with pappus of 7 to 9 narrowly oblong palerc of nearly its length. Ell. Sk. 

 ii. 447. Low pine barrens, S. Carolina to Florida and Louisiana ; first coll. by Bartram. 



B. multiflora, NUTT. 1. c. Slender, from an annual or biennial root, branching above, very 

 leafy up to the several or numerous slender peduncles, glabrous or sometimes sparsely hir- 

 sute : leaves all narrowly linear: heads small (3 or in fruit 5 lines high) : bracts of the 



