COMPOSITAE. 925 



Puberulent; leaves sparingly dentate, or entire; heads loosely clusterea, S-10 mm. high. 



1. K. eupatorioides. 

 Pubescent or tomentulose; leaves sharply serrate; heads densely clustered, 12-16 mm. 

 hight 2. A', glutinosa. 



1. Kuhnia eupatorioides L. False Boneset. (I. F. f. 3634.) Erect, 

 puberulent and resinous. 3-9 dm. high, branched above. Leaves lanceolate or 

 linear-lanceolate, acute or obtusish at "the apex, narrowed at the base, the upper 

 sessile, the lower usually short-petioled; heads several or numerous, peduncled, 

 8-10 mm. high; outer bracts of the involucre lanceolate or ovate-lanceolate, 

 acuminate, the inner much longer, linear, cuspidate; pappus tawny, or sometimes 

 nearly white. In dry soil, N. J. to Ga., Ohio, W. Va. and Tex. Aug. -Sept. 



2. Kuhnia glutinosa Ell. Prairie False Boneset. (I. F. f. 3635.) Stouter 

 and often taller than tbe preceding species, corymbosely or paniculately branched, 

 somewhat viscid. Leaves all sessile, lanceolate to ovate-lanceolate, usually sharply 

 serrate with distinct teeth, veiny, 3-7 cm. long, 6-20 mm. wide; or those of the 

 branches linear- lanceolate and entire; heads numerous, 12-16 mm. high, their 

 peduncles mostly short ; inner bracts of the involucre lanceolate, acuminate; pap- 

 pus tawny or brown. In dry soil, 111. to S. Dak., Ala. and Tex. Aug. -Oct. 



8. LACINARIA Hill. [LIATRIS Schreb] 

 Erect perennial herbs, usually from a globular tuber, simple or little branched, 

 with alternate entire narrow 1-5-nerved leaves, and spicate or racemose discoid 

 heads of rose purple or white flowers. Involucre oblong, ovoid or subhemispheric, 

 its bracts imbricated in several series, the outer shorter. Receptacle flat, or slightly 

 convex, naked. Corolla regular, its tube slender, its limb 5-lobedor 5 -cleft. An- 

 thers obtuse at the base. Style branches elongated, obtuse or flattened at the apex. 

 Achenes 10-ribbed, slender, tapering to the base. Pappus of 1 or 2 series of slender 

 barbellate or plumose bristles. [Latin, fringed, from the appearance of the heads.] 

 About 25 species of eastern and central N. Am. 



* Bracts of the involucre acute, acuminate or mucronate. 

 Involucre cylindric, or turbinate, 15-60-flowered, its base rounded. 



Bracts with lanceolate spreading rigid tips. 1. L. squarrosa. 



Bracts mucronate, closely appressed. 2. L. cylindracea. 



Involucre oblong, or narrowly campanulate, 3-6-flowered. 



Inner bracts with prolonged petaloid tips. 3. L. elegans. 



Bracts all acute, mucronate or acuminate. 



Bracts appressed ; pappus-bristles very plumose. 



Leaves 2-4 rum. wide: spike usually leafy below. 4. L. punctata. 



Leaves less than 2 mm. wide; spike mostly naked. 5. L. acidota. 



Tips of the bracts spreading; pappus-bristles barbellate. 6. L. pycnostachya. 



* * Bracts of the involucre rounded, obtuse, or acutish in No. n. 

 Bracts of the involucre very obtuse. 



Involucre hemispheric, 10-25 mm. broad, 15-45-flowered; heads peduncled. 



7. L. scariosa. 

 Involucre oblong, 4-8 mm. broad, 5-15-flowered. 



Involucre rounded at base; bracts usually not punctate; heads mostly sessile. 

 Spike elongated, not very dense, often 3 dm. long. 8. L. spicata. 



Spike short, exceedingly dense. 9. L. Ka?isana. 



Involucre narrowed at base ; bracts usually very punctate; heads peduncled. 



10. L. graminifolia. 

 Bracts of the involucre acutish, punctate; involucre oblong-campanulate. 



11. L. Smallii. 



I. Lacinaria squarrosa (L.) Hill. Scaly Blazing Star. (I. F. f. 3636.) 

 Usually stout. 2-6 dm. high, pubescent or glabrous. Leaves narrowly linear, 

 rigid, sparingly punctate, 7-15 cm. long, 2-5 mm. wide; heads sessile or short- 

 peduncled. usually few. or sometimes solitary. 2-4 cm. long. 8-15 mm. thick; 

 bracts of the involucre imbricated in 5-7 series, lanceolate, rigid, acuminate, gla- 

 brous or pubescent; flowers bright purple; pappus very plumose. In dry soil, 

 western Out. to Ky.. Fla.. S. Dak., Neb. and Tex. June-Sent. 



Lacinaria squarrosa intermedia (Lindl.) Porter. Heads narrower; tips of the bracts 

 less spreading. With the type. 



