COMPOSITE. 157 



Achenia about 10-ribbed, somewhat cylindric. Pappus of 

 numerous plumose or barbulate bristles. 



1. L. spicata Willd.: stem simple, smooth ; leaves linear, entire, smooth, 

 ciUate at base, nerved and punctate ; upper very short, often subulate ; 

 heads 9 — l3-flo\vered, in a dense elongated spike ; scales of the involucre 

 oblong, appressed, obtuse, L. macrostachya Mich. Pursh. 



Meadows. Can. to Flor. Aug., Sept. %.—Stem 3— -6 feet high. Spike 

 terminal, 6 — 18 inches long. Flowers bright purple. 



Long-spiked JAatris. Blue Blazing Star. 



2. L. pilosa Willd. : stem simple, pubescent ; leaves linear, hairy, ciliate ; 

 heads 10 — l4-fl9Wered, on long pedicels, forming a loose raceme ; scales of 

 the involucre oblong, obtuse, villous. 



Pine barrens. N. J. to Geor. Sept.— Nov. %..—Stem 2—3 feet high, a 

 little hairy. Leaves long and linear. Raceme long, leafy. Flowers small, 

 bright purple. Hairy Liatris. 



3. L. scariosa Willd. : stem erect, pubescent ; leaves lanceolate, pubes- 

 cent, scabrous on the margin ; lower oblong, tapering into a petiole ; heads 

 15 — 40-flovv^ered, in a spike or raceme ; scales of the involucre obovate, 

 obtuse, scarious on the margin, the lower a httle spreading or squarrose. 

 L. ketcrophylla Niitt. 



Sandy woods. Can. to Flor. and Texas. Aug.— Oct. 1\..—Stem 3—5 feet 

 high, stout, striate. Lower leaves very long. Flowers numerous, bright purple. 

 A very variable species. Ragged-cupped Liatris. 



4. L. squarrosa Willd. : stem simple, pubescent ; leaves very long, linear, 

 nerved, with the margins somewhat scabrous ; heads few, about 20-flow- 

 ered, on leafy pedicels, racemose ; upper scales of the involucre lanceolate, 

 rigid and spreading ; segments of the flowers linear, villous internally. 



Sandy woods. Can. to Flor. W. to Miss. Sept., Oct. %.—Stem 2— 3 feet 

 high. Heads generally 4 — 5, bright purple. Rough-headed Liatris. 



5. L. cylindrac.ea Mich. : stem • leafy, slightly hairy ; leaves linear and 

 lance-Unear, rigid, mostly 1-nerved; heads few, (1 — 7, rarely more,) turbi- 

 nate-cyUndric, sessile or pedicellate, 16 — 20-flowered ; scales of the invo- 

 lucre numerous, with rounded abruptly mucronate tips. (^Torr. N.Y. F'l.) 

 L. jlexuosa Thomas, in Sill. Journ. xxxvii. 328. 



Near Niagara Falls. Thomas. S. to Car. W. to Miss. Aug. %..—Stem 

 6 — 18 inches high, often somewhat flexuous. Leaves 6 — 10 mches long. Flow- 

 ers bright purple. Cylindrical-headed Liatris. 



G. CONOCLINIUM. D. C— Conoclidium. 



(From the Greek kuvus, a cone, and kXivti, a bed ; in allusion to its conic re- 

 ceptacle.) 



Heads many-flowered. Involucre campanulate ; the scales 

 in 2 — 3 series, linear, acute, subequal. Receptacle naked, 

 conic. Achenia angled. Pappus of one series, pilose, rough. 



C. calestiniLVi D. C. : herbaceous ; stem terete, pubescent ; leaves oppo- 

 site, petioled, ovate, truncate at base or subcordate, somewhat acute, ob- 



