9^6 FLORA. 



2. Lacinaria cylindracea (Michz.) Kuntze. Cylindric Blazing Star. 

 (I. F. f. 3637.) Glabrous or nearly so, stout, 3-5 dm. high, sometimes branched 

 above. Leaves narrowly linear, rigid, scarcely punctate, 7-17 cm. long, 2-4 mm. 

 wide; heads several or numerous, peduncled, or the lower sessile, turbinate-cylin- 

 dric, I-2.5 cm. high, 8-12 mm. thick; bracts of the involucre imbricated in 5 or 6 

 series, broadly oval, abruptly acuminate at the apex; flowers purple; pappus very 

 plumose. In dry soil, western Out. to Minn, south to 111. and Mo. July-Sept. 



3. Lacinaria elegans (Walt.) Kuntze. Handsome Blazing Star. (I. F. f. 

 3638.) Densely and finely pubescent, rarely glabrate, 6-9 dm. high. Leaves 

 linear, very punctate, 3-12 cm. long, 2-6 mm. wide, the upper much smaller than 

 the lower and soonreflexed; heads 4-5-flowered, 12-14 mm - high, narrowly cam- 

 panulate, very numerous in a dense spike or raceme; bracts of the involucre in 2 

 or 3 series, the inner ones linear, with rose- colored petaloid or sometimes white 

 tips; pappus very plumose; flowers purple. In dry soil, Va. to Fla., Ala. and 

 Tex. Aug. -Oct. 



4. Lacinaria punctata (Hook.) Kuntze. Dotted Button-Snakeroot, 

 (I. F. f. 3639.) Glabrous, or sparingly pubescent, 1.5-7.5 dm. high; rootstock- 

 stout, branching, or globose. Leaves linear, rigid, very punctate, 5-15 cm. long, 

 about 2 mm. wide, or the lower 4 mm., the upper gradually shorter, all erect or 

 ascending; heads 3-6-flowered, 12-16 mm. long, sessile, crowded into a dense 

 spike ; spike commonly leafy below ; involucral bracts oblong, cuspidate or acuminate, 

 often ciliate on the margins, imbricated in 4 or 5 series ; flowers purple. In dry 

 soil, Minn, and Manitoba to Mont., Mo., Tex., N. Mex. and Sonora. Aug. -Oct. 



5. Lacinaria acidota (Engelm. & Gray) Kuntze. Slender Button-snak^ 

 ROOT. (I. F. f. 3640.) Similar to the preceding species, but usually glabrous through x 

 out. Stem 6 dm. high, or less, slender. Leaves narrowly linear, .5-1 mm. wide, 

 or the lower wider, slightly punctate, 2-10 cm. long, the upper gradually shorter^ 

 spike slender, naked, or sparingly leafy at the base; heads 3-flowered, 12-18 mm 

 long; involucre narrowly oblong-campanulate, its bracts oblong to ovate-lanceolate 

 more or less punctate, abruptly or gradually acuminate, glabrous or sparingly cili- 

 ate; flowers purple. Prairies, Kans. and Mo. to Tex. Aug.-Oct. 



6. Lacinaria pyenostachya (Michx.) Kuntze. Prairie or Hairy Button- 

 snakeroot. (I. F. f. 3641.) Hirsute-pubescent above, usually glabrous below, 

 6-15 dm. high, very leafy. Lower leaves linear-lanceolate, narrowed oelow the 

 middle into a slender margined petiole, acuminate at the apex, often 3 &&i. long and 

 I mm. wide, the upper much smaller, linear-subulate, rigid, punctate; heads 8-1 i 

 mm. long, 3-6-flowered; involucre oblong or cylindric, its bracts obio^g, pubescent 

 and ciliate, with acute, slightly spreading, colored tips; flowers pukpic. On prai- 

 ries, 111. and Minn, to Neb., Ky., La., and Tex. Aug. -Sept. 



7. Lacinaria scaridsa (L.) Hill. Large Button-snake*cot. (I. F. f. 3642 ) 

 Finely pubescent, at least above, 3-18 dm. high. Lower leaves oblanceolate, spa :- 

 ulate or oblong-lanceolate, narrowed into a margined petiole, often 3 dm. long aid 

 4 cm. wide; upper leaves linear or linear-lanceolate, much smaller, all dense y 

 punctate; heads hemispheric, on stout peduncles 4-50 mm. leng, or sometimes s(J.. 

 sile; bracts of the involucre imbricated in 5 or 6 seric«. spatulate-linear, oblanco 

 late or obovate, their tips dry and scarious, often, colored; flowers bluish purp'e; 

 pappus barbellate. In dry soil, Me. to Fla., One, Manitoba, Neb. and Tex. Avg, 

 Sept. 



Lacinaria scarifcsa squarrul6si. (Michx. 7 Small. Heads smaller, 10-14 mm. bro;d, 

 turbinate-hemispheric. Dry wcods, Va. to r la. and Tex. Perhaps a distinct species. 



8. Lacinaria soicata (L.) Kuntze. Dense Buttonsnakeroot. G.^ 

 FEATHER. 1 mail's Bit. (I. F. f. 3643.) Glabrous or nearly so. 6-18 dm. high. 

 Iyower leaves linear-lanceolate or linear-oblong, usually blunt-pointed, sometimesu 

 dm. l<»ng and I cm. wide, the upper linear or even subulate, somewhat or obscurely 

 punctate; spike generally oien>e. 1-4 dm. long; bracts appressed, oblong, obtuse 

 and scarious-margined at the apex, imbricated in 4-6 series; flowers blue-purple. 

 occasionally white, in moist soil, Mass. to Fla., Ont., S. Dak., Ky., La. and Ark. 

 Aug.-Oct. 



Lacinaria spic&ta pumila (Lodd.) Porter. Low, stout, 3-6 dm. high. Lower leave 

 broader and shorter, obtuse; spike shorter; heads larger. 



