ORDER LXYIII. — COMPOSITE. 355 



S-nervcd, cauline, sub-linear; pappus plumose; scales of the involucre 

 in about 3 series, the outer ones expanding. — Purple. If. N. C. 8 — 

 17 inches. 



4. C. coRYMBo'sus, (T. tfe G.) Stem erect, brandling near the sum- 

 mit ; branches hirsute, tomentose. Radical leaves cuiieate-lanceolate, 

 tomentose; cauline leaves oblong, sessile. Flowers m terminal corymbs ; 

 involucre with about 20 florets ; scales hairy at tiie ba.-^e, with a mem- 

 branaceous margin ; pappus colored ; chaff linear. — Purple. If. Sept. 

 — Oct. Wet places. 2 — 3 feet. Liatris tomentosa, Ell. 



Genus YIII.— LIATRIS. Schreb. 

 (Probably from lia'40, I come forth, from the early appearance of its leaves.) 



Involucre imbricate, oblong ; florets perfect. Receptacle 

 naked. Corolla tubular, 5-lobed ; branches of the style much 

 exserted ; pappus plumose, persistent, generally colored. Fruit 

 pubescent, striate, obconic. Anthers entire at the base. Style 

 bifid. Flowers usually purple, all tubular. Perennial, herbar 

 ceous plants, with alternate, entire leaves. 



a. Flowers in spikes or racemes. Boot tuberous. Leaves linear or grass- 

 like. 



1. L. spica'ta, (Willd.) Stem simple, glabrous, leafy. Leaves linear- 

 lanceolate, glabrous, acute, dotted, somewhat ciliate at the base ; upper 

 ones very short. Flowers in terminal spikes, with bracteal leaves ; in- 

 volucre cylindrical; scales oblong, shorter than the flowers; outer 

 scales shortest. Generally 8 florets in a capitulum, longer than the invo- 

 lucre. Seeds hairy, furrowed. — Purple. 2f. Aug. — Oct. Pine-bar- 

 rens. 2 — 4 feet. Gay-feather. Bulion Snakeroot. 



2. L. GRAMiMFOLiA, (Walt ) Stem simple, glabrous or slightly hairy. 

 Leaves linear, long, with the midrib hairy and the margin scabrous. 

 Flowers in a terminal spike, with bracts as long as the involucre ; invo- 

 lucre cylindiical, witli about 6 florets ; scales pubescent along the mar- 

 gin, mucronate. Corolla covered with glantlular dots. Steds hairy; 

 pappus uncolored. — Purple. If. Sept.. — Oct. In pine-barrens. 2 — t ft. 



3. L. Boykin'ii, (T. <fe G.) Stem slender, erect, nearly glabrous. 

 i("ai;(?s linear, punctate; lower ones long, upper short and setaceous. 

 Spike virgate; heads 8 — 5-flowered ; scales of the involucre glabrous; 

 pappus plumose. Acheuia villous. — Pale purjile. Aug. — Sept. West- 

 ern Geo. 1—2 feet. 



4. L. tenuifo'lia, (Nutt.) Stem simple, slender, glabrous. Lowtr 

 leaves crowded, narrow, or linear, slightly hairy at the base ; upper 

 leaves setaceous, scattered. Flowers in long racemes, with leafy pedi- 

 cels ; involucre oblong, about 5-flowered ; scales membranaceous along 

 the margins. Corolla with glandular dots. Seeds hairy ; pappus not 

 colored. — Purple. If. Aug. — Oct. Dry pine barrens. 2 — 4 feet. 



5. L. CYLiNDRACEA, (Mich.) Stem slender, glabrous. Leaves linear, 

 long, narrow, glaltrous; upper ones pubescent along the margin, lower 

 ones alternate at the base. Floivers few, in a terminal s|)ike ; invohiere 

 cylindrical, eontaining 14 — 20 florets; scales oldoiig, abruj>lly acumi- 

 nate, pubescent along the margin. Corolla glandular ; pap})us plu- 

 mose. — Purple. If. Aug — Sept. Dry, sandy soils. Mid. Geo. 1 — 2 ft. 



