LIATRIS. LXXV. COMPOSITE. 317 



C. cosLKSTlNUM. DC. (Coelestina coerulea. Spreng. Eupatorium celes- 

 tinum. Linn.'j -Herbaceous, nearly glabrous, much branched; hs. deltoid- 

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

 serrate, veiny ; petioles slender, about half as long as the lamina ; corymbs nu- 

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

 &c., Penn. and S. and W. States! ^ Stem 1 2jf high, terete, with opposite 

 branches. Leaves 1 2J' long, as "wide. Flowers 2050 in a head, of a 

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



7. LIATRIS. 



Gr. Xc, an emphatic prefix; arpus, invulnerable; used as a vulnerary. 



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

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

 exserted. % herbs or shrubs. Root tuberous. St. simple. Lvs 

 alternate. FLs. cyanic. 



* Heads 16 &Q~flowered. 



1. L. SCUTARROSA. Willd. Blazing Star. 



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

 roc. flexuous, leafy ; hds. lew, sessile or nearly so ; invol. ovate-cylindric ; scales 

 large, squarrose-spreading, outer larger, leafy, inner mucronate-acuminate, 

 scarcely colored ; fls. numerous j pappus plumose. A splendid plant, native 

 (in N. Y. according to Prof. Eaton) Penn. to Flor. and W. States ! Stem 2 

 3f high, thickly beset with long, linear leaves. Heads 5 20, with brilliant 

 purple flowers. Aug. f 



2. L. CYLINDRACEA. Michx. 



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

 linear, mostly 1-veined; Ms. few, sessile or pedicellate, cylindrical, 15 20- 

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

 Prairies and barrens, Mich, to Mo. Stem f 18' high. Leaves 2 5' by 2 1". 

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

 bright purple. 



3. L. SCARIOSA. Gay Feather. 



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

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

 obovate, very obtuse, purplish ; Jls. numerous ; pappus scabrous. A beautiful 

 plant, 4 5f high, in woods and sandy fields, Mass. (Richard f\ 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 15-flowercd. 



4. L. GRAMINIFOLIA. Willd. Torr. & Gray. Grafs-leaved Liatris. 

 Glabrous or with scattered hairs ; si. slender and simple ; Ivs. linear, 1- 



veined; Ms. 7 12-flowered, spikes or racemes sometimes paniculate below; 

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

 hairy. N. J. to Ala. 



0. 1 dubia. (L. pilosa. /?. dubia. Ph. L. dubia. Bart.) Inflorescence 

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

 2 3f high. Leaves 3 6' by 2 1". Heads rather small. Sept. Oct. 



5. L. SPICATA. Willd. Slender-spiked Liatris. 



Lrs. lance-linear, smoothish, punctate, ciliate, lower ones narrowed a f 

 base; Ms. 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. Heads numerous, with bright purple flowers. Aug. f 



/?. rcsinosa. T. & G. (L. resinosa. Nidi.) Plant smaller; hds. about 5- 

 flowered. 



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



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



