Laatris. LXXV. COMPOSITZ. 317 
C. ca@Lestinum. DC. (Celestina cerulea. Spreng. Eupatorium celes- 
tinum. Linn.)—Herbaceous, nearly glabrous, much branched ; Jvs. deltoid- 
ovate, 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—2if high, terete, with opposite 
branches. Leaves 1—2}/ long, 3 as wide. Flowers 20—50 in a head, of a 
light or sky-blue, reddish in fading. Aug. Sept. 
% LIAT RIS. 
Gr. Xt, an emphatic prefix, arpws, 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. Lws. 
alternate, Fils. cyanic. ; ; 
* Heads 16—60-flowered. 
1. L. squarrésa. Willd. Blazing Star. 
Smooth or scabrous-pubescent; Jvs. linear, lower ones attenuated at base ; 
yac. flexuous, leafy ; ids. few, sessile or nearly so; invol. ovate-cylindric; scales 
large, squarrose-spreading, outer larger, leafy, inner mucronate-acuminate, 
scarcely colored; fs. 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 : 
J 
2. L. cytinpracea. Michx. 
St. low, slender and very leafy, smooth or somewhat hirsute; lus. rigid, 
linear, mostly 1-veined; Ads. few, sessile or pedicellate, cylindrical, 15—20- 
flowered ; scales short, close, rounded or obtuse and abruptly mucronate at apex.— 
Prairies and barrens, Mich. toMo. Stem 6—18’high. Leaves 2—5’ by 2—4”. 
Heads 1’ long, rarely solitary, sometimes 10 or 12, mostly about 5. Flowers 
bright purple. 
3. L. scartésa. Gay Feather. 
Scabrous-pubescent; Jvs. lanceolate, lower on long petioles, upper linear 
and much smaller; ds. remotely racemed ; invol. globose-hemispherical ; scales 
obovate, very obtuse, purplish; fls. numerous; pappus scabrous.—A beautiful 
plant, 4—5f high, in woods and sandy fields, Mass. (Rickard ? to Ill.! 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-flowered. 
4. L. craminirouia. Willd. Torr. & Gray. Grass-leaved Liatris. 
Glabrous or with scattered hairs; st. slender and simple; vs. 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. 
B.% 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 Laatris. 
Lws. lance-linear, smoothish, punctate, ciliate, lower ones narrowed at 
base; Ads. in a long, terminal spike, nearly sessile; /fts. of the invol. oblong, 
obtuse ; fis. 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. t 
B. resinosa. 'T. & G, (L. resinosa. Nutt.) Plant smaller; fds. about 5- 
flowered. 
6. L. pycnostacuya. Michx. Thick-spiked Liatris. 
Simple, more or less hirsute, very leafy; vs. rigid, ascending, straight, 
