uiATRm. LXXV. COMPOSITE. 31t 



C. cesLESTiNTjM. DC. (Coslestina coerulea. Spreng. Eirpatorium celes- 

 tinum. Linn.') — Herbaceous, nearly glabrous, much branched ; Ivz. deltoid- 

 svate, truncate or subcordate at base, tapering to an obtusish apex, crenate- 

 ^errate, veiny- petioles slender, about half as long as the lamina; cori/mbs nvt- 

 merous, subumbellate ; scales numerous, setaceous. — Hedges, thickets, roadsides, 

 &c., Penn. and S. and W. States! Stem 1 — S^f high, terete, with opposite 

 branches. Leaves 1 — 2^' long, § as wide. Flowers 20 — 50 in a head, of a. 

 light or sky-blue, reddish in lading. Aug. Sept 



7. LIATRIS, 



Gt. X(, an emphatic prefix, arptty;, invulnerable j used as a vulnerary. 



FloTvers all tubular ; involucre oblong, imbricate ; receptacle naked ; 

 pappus plumose, copious ; achenia obconic, 10-striate; styles much 

 exserted. — % herbs or shrubs. Root tuberous. St. simple. Zics 

 alternate. Fls. cyanic. 



* Heads 16 — QQ-flow^rcd, 



1. L. sauARRosA. Willd. Blazing Star. 



Smooth or scabrous-pubescent] Ivs. linear, lower ones attenuated at base; 

 vac. fiexuous, leafy; hds. lew, sessile or nearly so; invol. ovate-cylindric ; scales 

 large, sqiianose-spreading, outer larger, lealy, inner mucronate-acuminate, 

 scarcely colored ; Jls. numerous , pappus plumose. — A splendid plant, native 

 (in N. Y. according to Prof. Eaton) Penn. to Flor. and W. States! Stem 3 

 — 31" high, thickly beset with long, linear leaves. Heads 5 — 20, with brilliaat 

 purple flowers. Aug. f 



2. L. CYLiNDRACEA. Michx. 



SI. low, slender and very leafy, smooth or somewhat hirsute; Ivs. rigid, 

 linear, mostly 1-veined ; hds. few, sessile or pedicellate, tylindrical, 15 — 20- 

 flowered ; scales short, close, rounded or obtuse and abruptly mucronate at apex. — 

 Prairies and barrens, Mich, to Mo. Stem fi — 18' high. Leaves 2 — 5' by 2 — i". 

 Heads 1' long, rarely solitary, sometimes 10 or 12, mostly about 5. Flowers 

 bright purple, 



3. L. scARiosA. Gay Feather. 



Scabrous-pubescent ; lis. lanceolate, lower on long petioles, upper linear 

 and much smaller; hds. remotely racemed; invol. globose-hemispherical ; scales 

 obovate, very obtuse, purplish ; y.5. nwrneToxxs; pajrpus scabrous. — A beautiful 

 plant, 4— 5f high, in woods and sandy fields, Mass. {Richard !) to 111. ! and La. 

 Stem rather stout, whitish above. Leaves numerous, entire, lower 3 — 9' long, 

 upper 1 — 3' by 1 — 3", rough-edged. Heads 5 — 20, 1' diam., in a long raceme, 

 each 20 — 40-flowered. Corolla purple. Aug. f 



* * Heads 5 — \b-fimoered. 



4. L. GRAMiNiFOLiA. Willd. Torr. & Gray. Grass-leaved Liaf/ris. 

 Glabrous or with scattered hairs; 5/. slender and simple; Zt«. linear, 1- 



veined; hds. 7 — 12-flowered, spikes or racemes scmetioies paniculate below j 

 involucre acute at base ; scales many, obtuse, appressed, outer row shorter ; ach. 

 hairy. — N. J. to Ala. 



fi. 1 diibia. (L. pilosa. (i. dubia. Ph. L. dubia. Bart.) Inflorescence 

 sometimes compound below, or partly .paniculate. — Pine barrens, N. J. Stem 

 2— 3f high. Leaves 3— G' by 2 — 4". Heads rather small. Sept. Oct. 



5. L. spiCATA. Willd. S-.ender-spiked Liatris. 



Lvs. lance-linear, smoothish, punctate, ciiiate, lower ones narrowed at 

 base ; hds. in a long, terminal spike, nearly sessile ; Ifts. of the invol. oblong, 

 obtuse ; fls. about 8 ; pappus scabrous-plumose. — Native from N. J. and Mich. » 

 to Flor. and La. Abundant in prairies. A beautiful species, often cultivated. 

 Stem 2 — 5f high, fleads numerous, with bright purple flowers. Aug. f 



/?. resinusa. T. & G. (L. vesinosn. Nutt.) Plant smaller; hds. about 5- 

 flowered. 



6. L. pycNosTACHYA. Michx. Thick-spiked Liatris. 



Simple, more or less hirsute, very leafy ; lvs. rigid, ascending, straight,. 



