244 COMPOSITE. (composite family.) 



72. ERECHTHITES, Raf. Fibbwkb* 

 Heads many-flowered, discoid ; the marginal flowers pistillate, very slender, 



2-3-toothed ; the others perfect, 4 - 5-toothed. Scales of the cylindrical involu- 

 cre in a single row, linear, aente, bracted. Receptacle naked. Achenia oblong, 

 Striate. Pappus of copious soft hairs. — Erect annual herbs, with alternate 

 simple leaves, ami corymbose heads of greenish flowers. 



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

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

 bracts subulate, minute ; pappus white. (Seneeio hieracifolius, L.) — Rich soil, 

 common. July - Sept. — Stem 1° - 5° high. 



73. CACALIA, L. 



Ihads 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 tuber- 

 cular prominence in the centre. Achenia 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 : hwo/ucre about 1 2-leave d, 25 - 30-Jlowered. 



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

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

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



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



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

 toothed, on slender petioles ; the lowest large, lvniform, the upper ones roundish ; 

 corymb compound. — Damp soil in the mountains of North Carolina and Teiv 

 nessce. July and Aug. — Stem 4°-9° high. Radical leaves sometimes. 2° 

 in diameter, the teeth mucronate. 



3. C. atriplicifolia, L. Stem terete, corymboscly branched above ; 

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

 the lowest ones renil'orm ; the upper rhomboid ; corymbs compound. — Wood* 

 and moist banks, Florida, and northward. — Aug. and Sept. — Stem 4° -8° high. 

 Lease,, smaller and thicker than the last. 



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

 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- An-. — Stem 2°-3° high. 



5. C. ovata, Walt. Stem terete; leaves glaneoue beneath, 8-5-oerved, 

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

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

 .inly and A ug. — Stem 3° - 4° high. U>wes4 leave* 5/ -8' long. 



f). C. tuberOSa, Null Stem I'm rowed, an-led ; leaves not glaseOW, OVttl 



or lanceolate oblong, ttronglj 5 - 7-nejrved, entire or slightly toothed ; the lowest 

 lute..' petioled ; corymbs dense.— Swamps, Georgia, Florida, and westward. 



Aug and Sept. — Stem 3° - 5° high. Leaves thick. 



