COMPOSITE. (composite FAMILY.) 235 



GATA. Lowest leaves linear-spatulate, 1 -nerved ; the others narrow-linear or 

 filiform; heads larger. — Low pine barrens, Tlorida, and northward. Sept. 



— Stem 2° high. 



22. APLOPAPPUS, Cass. 



Heads many-flowered; the rays pistillate. Involucre hemispherical or 

 bell shaped. Pappus single, of numerous capillary bristles, alike in the rays 

 and disk. Eeceptacle alveolate. Achenia silky. — Annual or biennial herbs, 

 with alternate leaves, and scattered heads of yellow flowers. 



§ J. Heads large: incolucre hemispherical : rays numerous : jnijipus brown. 



1. A. rubiginosus, Torr. & Gray, var. phyllocephalus, Gray. 



Stem 2° -3° high, corymbosely branched, the branches short, pubescent; 

 leaves lanceolate, with bristle-pointed spreading teeth ; heads, with involucre- 

 like leaves at the ba.se ; achenia club-shaped ; bristles of the jjappus unequal. 



— Damp places, Funta Eassa, Soutli Florida. Oct. 



§ 2. Heads small: involucre narrow-!iel.l-shfiped,with subulate scales : rai/s 5-8: 



pappus white. 



2. A. divaricatus, Gray. Hispid and glandular ; stem erect, the slen- 

 der branches spreading ; leaves linear-lanceolate, sparingly tootlied; involu- 

 cre soft-hairy; rays 5-8. — Sandy fields and woods, Florida, Georgia, and 

 westward. Sept. — Stem l°-4° high. Panicle large. Heads 15-20- 

 flowered. 



23. HETEROTHECA, Cass. 



Heads many-flowered. Rays pistillate. Scales of the involucre imbricated 

 in few rows, linear. Receptacle alveolate, bristly. Achenia of the raj's oval, 

 destitute of pappus, those of the disk flowers obovate, compressed, hairy, with 

 a double pappus ; the outer one short and chaffy, the inner bristly. — Biennial 

 rough-hairy branching herbs, with irregularly toothed or entire alternate 

 leaves, and corymbose-panicled heads of yellow flowers. 



1. H. Lamarckii, Cass. Leaves oblong, toothed, commonly sessile or 

 clasping ; the lowest petioled, obtuse or somewhat cordate at the base ; in- 

 volucre thick, shorter than the brownish inner pappus. — Dry sandy places 

 along the coast. South Carolina, and westward. Sept. — Stem rigid, l°-2° 

 high. Leaves V-2' long. 



24. CHRYSOPSIS, Nutt. 



Pajjpus of the ray and disk flowers alike, double ; the exterior row chaffy, 

 or of chaffy bristles, the interior longer, capillary ; otherwise like Heterotlieca. 



— Biennial or perennial hairy or silky herbs, with linear or oblong mostly 

 entire leaves. Heads mo.stIy corymbed. Flowers yellow. 



* Leaves narrow, nerved, entire : achenia obi on q -I in ear, narrowed at each end, 

 pubescent : perennials. 

 1. C. graminif olia, Xutt. Stem leafy, white with appressed silky shin- 

 ing hairs, as also the linear leaves; heads numerous, rather small, on slender, 

 more or less glandular peduncles ; involucre top-shaped, the linear scales glan- 



