LiATRis. LXXV. COMPOSITiE. 317 



C. ccELRSTiNUM. DC. (Coclcstiiia conruloa. Spren::. Enpalorium celes- 

 tinuin. Linn.^ — Herbaceous, nearly glabrous, much branched ; Ivs. deltoid- 

 ovate, truncate or subcordate at base, tapering to an obtusish npex, rrenate- 

 serrate, veiny; pcliolrs slender, about half as long as the lamina; corymhs nu- 

 merous, subuinbellate ; .srr//r.s numerous, st-taceous. — Hedges, thickets, roadsides, 

 «&€., Penn. and S. and W. Stales! Stem 1 — 2ir high, terete, with opposite 

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

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



7. LI At R IS. 



CrI'. Xi, an emphatic prefix, arpwf, invulnerable; used as a vulnerary. 



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

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

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

 alternate. Fls. cyanic. 



* Heads 16 — GO-Jlaicercd. 



1. L. sauARRosA. Willd. Blazing' Star. 



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

 rac. flexuous, leafy ; hds. few, sessile or nearly so ; invol. ovate-cylindric ; scales 

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

 scarcely colored; ^5. numerous, 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. Mlchx. 



S(. low, slender and very leafy, smooth or somewhat hirsute ; lvs. rigid, 

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

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

 Prairies and barrens, Mich, to Mo. Stem 6 — 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 ; lvs. 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!) 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. ■\ 



* * Heads 5 — \b-Jloioered. 



4. L. GRAMiNiFOLiA. Willd. Torr. & Gray. Grass-leaved Liatris. 

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



veined; hds. 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. 



p. 7 dubia. (L. pilosa. /?. dubia. Ph. L. dubia. Bart.) Inflorescence 

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

 2— 3f high. Leaves 3—6' by 2—4". Heads rather small. Sept. Oct. 



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



Lvs. lance-linear, smoothish, punctate, ciliate, 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 MichJ 

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

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



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

 flowered. 



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



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



