COMPOSITE. 629 



WEDELIA, Jacq. 



Heads many-flowered, radiate. Flowers of the ray pistillate, of the disk 

 perfect, tubular, 5-tOOthed. Scales of tlie involucre in '2-'-) rows, the outer 

 ones leafy, the inner ones membranaceous. Receptacle convex, chaffy. 

 Achenia obovate or compressed. Pappus calyx-like, composed of united 



dentate and ciliate scales. — Herbs or undershrubs, with opposite serrate 

 leaves, and mostly solitary yellow flowers. 



W. carnosa, Rich. Herbaceous, smooth, creeping ; leaves sessile, thick, 

 obovate, slightly 3-lobed ; heads axillary, peduncled ; outer scales of the in- 

 volucre oblong, as long as the disk, the inner ones smaller ; achenia wingless. 



— Springy places, Key Biscayne (Curtiss). 



DRACOPIS, Cass. 



Scales of the involucre very small, the inner row linear, mucronate. 

 Achenia terete, finely striate and glandular. Pappus none. Otherwise like 

 Rudbeckia. 



D. amplexieaulis, Cass. — New Orleans (Dr. Hale), and westward. — 

 Annual, smooth, branching, 1° -3° high; leaves oblong, mostly serrate, 

 clasping ; heads terminating the peduncle-like branches ; rays yellow ; disk 

 brown. 



RUDBECKIA, L. 



R. rupestris, Cliickering. Stem and leaves sparingly hairy ; lower stem- 

 leaves 3-parted, with deep rounded sinuses, the lateral lobes spreading; heads 

 large (f wide), globular ; rays 10-13, orange-yellow ; otherwise like R. tri- 

 loba. — Rocky slopes of Little Roan Mountain, North Carolina (Prof. J. W. 

 Chickervng). 



R. bupleuroides, Shuttlw. Smooth throughout ; stem sometimes flexu- 

 ous below ; leaves broadly linear, 3-nerved, entire, the lowest ones tapering 

 into a more or less elongated petiole, the upper ones distant, short, linear- 

 subulate ; heads long-peduncled, globose ; rays yellow, longer than the dark- 

 brown disk ; achenia slightly curved ; pappus cup-shaped. (It. Mohrii, Gray.) 



— Wet pine barrens, St. Mark's and Iola, Florida (Rugel, Mohr). — Stem 2°- 

 3° high. Lower leaves 6'- 12' long. 



HELIANTHUS, L. 



H. Floridanus, Gray. Stem tall (4°-G° high), smooth; leaves lanceo- 

 late or ovate-lanceolate, acute at both ends, sparingly denticulate, short-peti- 

 oled (2' -4' long) ; involucre smooth, the leaves lanceolate, acuminate; disk 

 dark purple ; rays long, oblong. — East Florida (Palmer, Garber). 



H. cinereus, Torr. & Gray. Rough with rigid white hairs ; stem simple ; 

 leaves ovate-lanceolate, slightly serrate, nearly sessile, paler beneath, the 

 upper ones small and distant ; heads 1-3 at the summit of the stem, short- 

 peduncled; scales of the involucre ovate-lanceolate, canescent. — Mountains 

 of Georgia, and westward. September. — Stem 2° -3° high. Leaves 3'- 

 5' long. 



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