338 FLORA OF TEXAS. 



bristly. — Biennial rough-hairy branching herbs, with irre- 

 gularly toothed or entire alternate leaves, and corymbose- 

 panicled heads of jl-Wow Jloicej's. 



H. SCABRA, DC. Leaves oblong, toothed, commonly 

 sessile or clasping, the lowest petioled, obtuse or somewhat 

 cordate at the base ; involucre thick, shorter than the 

 brownish inner pappus. Stem rigid, l°-2° high ; leaves 

 l'-2' long. 



CHRYSOPSIS, Nutt. 



Pappus of the ray and disk flowers alike, double ; the 

 exterior row chafiy, or of chaffy bristles, the interior 

 longer, capillary; otherwise like Heterotheca. — Biennial or 

 perennial hairy or silky herbs, with linear or oblong 

 mostly entire leaves ; heads mostly corymbed ; floivers 

 yellow. 



* Leaves narrow ^ nerved^ entire; achenia oblong-linear^ narrowed at each end^ 

 pubescent; perennials. 



C. GRAMixiFOLiA, IS'utt. Stem leafy, white with appress- 

 ed silky sliining hairs, as also the linear leaves; heads 

 numerous, rather small, on slender and more or less glan- 

 dular peduncles; involucre top-shaped, the linear scales 

 glandular. Stem l°-2° high ; lowest leaves 4-8' long. 



C. OLIGAXTHA, Chapm. Stem nearly naked and glan- 

 dular above, the lower part, like the linear or lanceolate 

 leaves, silky with appressed shining hairs; heads 1-4:, on 

 long erect glandular peduncles, rather large ; involucre bell- 

 shaped, the scales glandular-pubescent. Stem 1"" high ; 

 stem-leaves clasping, those of the root elongated. 



C. PINIFOLIA, Ell. Smooth; stem rigid; leaves linear, 

 crowded, rigid ; corymb large ; scales of the involucre 

 w^ooUy at the summit. Stem l|°-2° high ; stem-leaves 

 4'-6' long, the uppermost filiform; heads large; exterior 

 pappus somewhat chaffy. 



