COMPOSITE. (COMPOSITE FAMILY.) 235 



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

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



Stem 2 high. 



22. APLOPAPPUS, Cass. 



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

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

 and disk. Receptacle alveolate. Achenia silky. Annual or biennial herbs, 

 witli alternate leaves, and scattered heads of yellow flowers. 



1. lie/ids large : involucre hemispherical : rai/s numerous : pappus brown. 



1. A. rubiginosus, Ton-. & Gray, var. phyllocephalus, Gray. 



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

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

 like leaves at the base ; achenia club-shaped ; bristles of the pappus unequal. 



Damp places, Punta Kassa, South Florida. Oct. 



2. Heads small : involucre narrow-bell-shaped, with subulate scales : rays 5 -8 : 



pnppus white. 



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

 der branches spreading ; leaves linear-lanceolate, sparingly toothed ; 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 rays 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 brandling herbs, with irregularly toothed or entire alternate 

 leaves, and corymbose-pauicled 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 1'- 2' long. 



24. CHRYSOPSIS, Nutt. 



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

 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. Flowers yellow. 



* Leaves narrow, nerved, entire : achenia oblong-linear, narrowed at each end, 



pubescent : perennials. 



1. C. graminif Olia, Nutt. 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 glau- 



