338 LXXV. COMPOSITE. Zinnia. 



prominences, each branch leafless towards the summit and bearing a large head 

 with 12 — 15 bright yellow rays. These are an inch long, and surround a broad- 

 ly conical disk of dark purple or dark brown chaff and flowers. July Sept. ■\ 



5. R. FULGiDA. Ait. (R. chrysomela. Michx. R. spatulata. PA.) 



St. hirsute, with rigid hairs ; brandies slender, naked above ; Ivs. strigose- 

 pubescent, remotely denticulate, radical petiolate, ovate, cauline lance-oblong, 

 tapering to the sessile, subclasping base ; scales oblong, spreading, as long as 

 the spreading rays; cArt^ linear-oblong, obtuse. — Mountains, Penn. to Ohio! 

 and Ga. Stem 1 — 3f high. Rays 12 — 14, scarcely longer than the leafy invo- 

 lucre, deep orange-yellow. July, Oct. ■\ 



6. R. spEciosA. Wender. 



St. hispidly hirsute ; branches slender, elongated, naked above ; Ivs. sca- 

 brous-pubescent, strongly dentate, radical ones broadly ovate, 5-veined, on long 

 petioles, cauline ovate and lanceolate, 3-veined, upper sessile ; scales lance-lin- 

 ear, much shorter than the spreading rays ; chaff linear-oblong, acute. — Bor- 

 ders of woods, 111. Jenncy ! Ohio! to Penn. A large and very showy specieSj 

 2 — 4f high. Leaves rather thin, radical 4 — 5' by 3 — 4', the teeth mucronu- 

 late ; petioles 6 — 10' long. Rays about 18, oblong,linear, bright yellow. Aug. 

 —Oct. t 



31. ECHINACEA. Moench. 

 Gt, tj^ivoi, the hedgehog ; from the character of the paleee. 



Involucre scales imbricated in 2 rows ; ray-flowers neutral ; disk- 

 flowers $ ; receptacle conic, with rigid, mucronate paleae ; pappus 0. 

 — % Lvs. alternate. Rays purple, peiidulous. 



1. E. PURPUREA. Moench. (Rudbeckia Linn.) Purple Cone-Jlov-er or 

 Comb-flower. — Very rough ; lojcer lvs. broad-ovate, attenuate at base, 



remotely toothed ; cauline mies lanceolate-ovate, acuminate, nearly entire ; rayi 

 very long, deflexed, bifid. — Thickets and barrens. Western ! and Southern States. 

 A tall, handsom .; plant, often cultivated. Stem 4f high, branched, sulcate. 

 Leaves 4 — 8' long, ^ as wide, rough, with short, stiff bristles, 3-veined. Heads 

 large, solitary, on long peduncles. Disk thickly beset with the stiff, pointed, 

 brown chaff. Rays about 15, 2 — 3' long, pendulous. July — Sept. — Pcoot black, 

 pimgent, medicinal, -f- 



p. Rays nearly white.— 111. Dr. Mead in T. <^' G. Fl- Am. 



2. E. ANGUSTiFOLiA. DC. (Rudbeclda. pallida. Nitti.') 



St. hispid, subsimple, slender, naked above ; lvs. entire, hispidly pubescent, 

 3-veined, lower ones lanceolate, petiolate, upper lance-linear, sessile ; scales in 

 about 2 rows, short ; rays 12 — 20, slender, drooping. — Prairies and marshes. 111, 

 Mo. to Tex. Plant of a more slender habit than the last, 2 — 3f high. Leaves 

 3 — 6' by 3 — 6". Petioles — 8" long. Heads on long, naked peduncles. Rays 

 1 — 2' long, purple, varying to white. Disk brown. May — July. 



32. LEPACHYS. 

 Involucre in one series of linear scales ; ray flowers few, neutral, 

 disk perfect ; receptacle columnar, chaffy ; chaff" obtuse and bearded 

 at apex ; pappus ; fertile achenia compressed, 1 — 2-winged. — % Lvs. 

 alternate, pinnately divided. Hds. of flowers yellow, with long, droop- 

 ing rays. 



L. piNNATA. Torr. & Gray. (Rudbeckia. Mx. Obeliscaria. Cass.) 

 ScabroiTs; lvs. all pinnate, the divisions 3 — 7, some of the lower ones 2- 

 parted, the rest undivided ; rays elongated. — In dry soil, Western N. Y., West- 

 ern ! and Southern States. Stem 2 — 4f high, slender, iurrowed and hispid. 

 Heads very showy. Rays yellow, about 2' in length, pendulous, the disk ovate, 

 purple. 



33. ZINNIA. 



Dedicated to John Godfrey Zinn, a German botanist, 1557. 



Involucre scales oval, margined, imbricate ; rays 5, persistent, en- 



