COMPOSITAE. 927 



9. Lacinaria Kansana Britton. n. sp. KANSAS BUTTON-SNAKEROOT. Very 

 leafy, glabrous, about 6 dm. high. Base of the stem clothed with the fibrous rem- 

 nants of old leaves, as in L. spicata ; leaves similar to those of that species, linear, 

 blunt-tipped; heads confluent into a very dense spike 5-7 cm. long, about 2.5 cm. 

 thick, with numerous undeveloped ones in the axils of linear-subulate bracts below; 

 bracts of the oblong involucre oblong to oblong-spatulate, purple, rounded or obtuse; 

 pappus plumose. Dodge City. Kansas, on river bottoms, B. B. Smyth, No. 163, 

 1890. 



10. Lacinaria graminifolia (Walt.) Kuntze. LOOSE-FLOWERED BUTTON- 

 SNAKEROOT. (I. F. -3644.) Glabrous, or sparingly pubescent, 3-9 dm. high. 

 Leaves similar to those of the two preceding species, but more conspicuously punc- 

 tate, usually somewhat ciliate near the base and acute or acutish at the apex; bracts 

 distinctly punctate, appressed, rounded and scarcely margined at the apex, thick ; 

 flowers purple; pappus barbellate ; achenes hairy. In dry soil, Va. to Fla. and Ga. 

 Aug. -Sept. 



Lacinaria graminif61ia pilOsa (Ait.) Britton. Leaves usually prominently ciliate; heads 

 larger, spicate, racemose, or even paniculate ; bracts of the involucre linear-oblong or spat- 

 ulate, narrowly scarious-margined. In sandy soil, N. J. to Fla. and Ala. 



xx. Lacinaria Smallii Britton, n. sp. SMALL'S BUTTON-SNAKEROOT. 

 Similar to L. graminifolia. Stem very slender, 3-5 dm. high. Leaves scattered, 

 linear, 4-10 mm. wide, acute, pubescent on the midvein beneath, very punctate; 

 heads scattered, sessile in the axils of the upper small leaves, the uppermost leaves 

 not larger than the involucral bracts; involucre oblong-campanulate, about 

 8-flowered, about i cm. high, its innermost bracts linear, acute or acutish, the out- 

 ermost obtusish, all punctate; flowers purple; pappus short-plumose. Iron Moun- 

 tain. Smyth Co., Va., at 2900 ft., J. K. Small, Aug. 8, 1892. 



9. TRILISA Cass. 



Erect perennial herbs, with fibrous roots and alternate simple leaves ; those oi 

 the stem sessile or clasping, the basal ones narrowed into petioles. Heads small, 

 discoid, of 5-10 purple or white flowers, in terminal thyrsoid or corymbose panicles. 

 Involucre campanulate, its bracts imbricated in 2 or 3 series, the outer scarcely 

 shorter than the inner. Receptacle flat, naked. Corolla regular, its Iimb5-lobed. 

 Anthers obtuse and entire at the base. Achenes nearly terete, lo-ribbed. Style- 

 branches slender, obtuse. Pappus of I or 2 series of elongated, barbed bristles. 

 [Anagram of Liatris. ] Two known species. 



Stem glabrous; heads corymbose-paniculate. i. T. odoratissima. 



Stem viscid-pubescent ; heads thyrsoid-paniculate. 2. T. paniculata. 



1. Trilisa odoratissima (Walt.) Cass. VANILLA-LEAF. VANILLA-PLANT. 

 (I. F. f. 3645.) Rather stout, glabrous, 6-9 dm. high. Leaves thick, entire, or 

 sometimes dentate, the lower oblanceoiate, oblong or spatulate, obtuse, 10-25 cm - 

 long, 2.5-3.5 cm. wide, those of the stem gradually smaller, oblong, ovate, or oval, 

 the uppermost bract-like; heads corymbose-paniculate, about 6 mm. high; bracts 

 of the involucre oblong, obtusish; achenes glandular-pubescent. In pine-barrens, 

 Va. to Fla. and La. Aug. -Sept. 



2. Trilisa paniculata (Walt.) Cass. HAIRY TRILISA. (I. F. f. 3646.) Stem 

 viscid-pubescent, 3-9 dm. high. Leaves entire, the basal ones lanceolate or nar- 

 rowly oblong, acute, or obtusish, 7-25 cm. long, 1-3.5 cm - wide, those of the stem 

 much smaller, lanceolate, or oblong-lanceolate; heads thyrsoid-paniculate, about 

 6 mm. high; bracts of the involucre oblong, obtusish; achenes finely pubescent. 

 In pine-barrens. Va. to Fla. and Ga. Sept.-Oct. 



10. GUTIERREZIA Lag. 



Erect branching, usually glabrous and often glutinous herbs, or shrubs, with 

 linear entire alternate leaves, and small heads of both tubular and radiate yellow 

 flowers, corymbosely paniculate in our species. Radiate flowers few, pistillate. 

 Disk-flowers regular, mostly perfect, or some of them only staminate, the corolla- 

 limb 5-lobed. Involucre ovoid or narrowly campanulate. its bracts coriaceous, 

 imbricated in few series. Receptacle flat, convex, or conic, commonly foveolate. 



