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COMPOSITE. (COMPOSITE FAMILY.) 2G7 



involucre in a single row, linear, acute, bracted. Eeceptacle naked. Acheuia 

 oblong, striate. Pappus of copious soft hairs. Erect annual herbs, with 

 alternate simple leaves, and corymbose heads of greenish flowers. 



1. E. hieracifolia, Uaf. Stem mostly branched, smooth or hairy ; leaves 

 lanceolate, sessile, sharply serrate or toothed ; the upper somewhat clasping; 

 bracts subulate, minute ; pappus white. Rich soil, common. July - Sept. 

 Stem l-5 high. . 



83. CACALIA, L. 



Heads 5 - many-flowered ; the flowers all tubular and perfect, 5-cleft. 

 Scales of the involucre 5-30, in a single row. Receptacle flat, naked, or with 

 a tubercular prominence in the centre. Acheuia oblong, smooth. Pappus 

 of numerous capillary bristles. Perennial, mostly smooth and tall herbs, 

 with alternate entire or lobed leaves, and corymbose heads of white flowers. 

 * Receptacle flat : involucre about l'2-feaved, 25 - 30-Jlowered. 



1. C. suaveolens, L. Smooth; leaves ovate, hastate, acute, toothed- 

 serrate, on winged petioles; the uppermost sessile; bracts filiform. Low 

 ground, West Florida, and northward. Sept. - Oct. Stem 3 - 5 high. 



* * Receptacle tubercular in the centre : scales of the involucre and flowers 5. 



2. C. reniformis, Muhl. Stem angled ; leaves not glaucous, angularly 

 toothed, on slender petioles ; the lowest large, reniform, the upper ones 

 roundish ; corymb compound. Damp soil in the mountains of North Caro- 

 lina and Tennessee. July -August. Stem 4 -9 high. Radical leaves 

 sometimes 2 in diameter, the teeth mucronate. 



3. C. atrip licifolia, L. Stem terete, corymbosely branched above; 

 leaves glaucous beneath, angularly lobed, the lobes mostly entire, mucronate ; 

 the lowest ones reniform; the upper rhomboid ; corymbs compound. AVoods 

 and moist banks, Florida, and northward. August -Sept. Stem 4 -8 

 high. Leaves smaller and thicker than the last. 



4. C. diversifolia, Torr. & Gray. Stem angled ; leaves not glaucous, 

 petioled ; the lowest broadly cordate or cordate-ovate, obtusely toothed, the 

 upper 3-5-lobed. .Muddy banks of the Chipola River, Marianna, West 

 Florida. May - August. Stem 2 - 3 high. 



5. C. Ovata, Walt. Stem terete ; leaves glaucous beneath, 3-5 nerved, 

 ovate or oval, obtuse, entire or wavy-toothed ; the lowest long-petioled ; the 

 upper ones sessile ; corymbs open. Swamps. Georgia, Florida, and westward. 

 July - August. Stem 3 - 4 high. Lowest leaves 5' - 8' long. 



6. C. tuberosa, Xutt. Stem angled ; leaves not glaucous, oval or 

 lanceolate-oblong, strongly 5 - 7-nerved, entire or slightly toothed ; the lowest 

 long-petioled ; corymbs dense. Swamps, Alabama, and westward. August - 

 Sept. Stem 3 - 5 high. Leaves thick. 



7. C. Floridana, Gray. Stem stout, furrowed, 2 -4 high; leaves 

 oval, strongly nerved, dentate-serrate, the lower long-petioled ; lobes of the 

 corolla as long as the throat. Dry sandy barrens, East Florida. Sept. 



8. C. lanceolata, Xutt. Stem terete; leaves rather fleshy, lanceolate 

 or linear lanceolate, entire or coarsely toothed, 3-nerved, somewhat glaucous ; 



