COMPOSITAE. 925 



Puberulent; leaves sparingly dentate, or entire; heads loosely clustered, 8-10 mm. high. 



Pubescent or tomentulose; leaves sharply serrate; he*ads densely clustered i2-iTmm' 

 hl n - 2. K.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'- pan- 

 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 i- 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-lobed or c-cleft An 

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

 Achenes lo-nbbed, slender, tapering to the base. Pappus of I or 2 series of slender 

 barbellate or plumose bristles. [Latin, fringed, from the appearance of the heads 1 

 About 25 species of eastern and central N. Am. 



* Bracts of the involucre acute, acuminate or mucronate 

 Involucre cylindric, or turbinate, i 5 -6o-flowered, its base rounded. 



Bracts with lanceolate spreading rigid tips. , L souarrosa 



Bracts mucronate, closely appressed jr s y" a ^ rosa ' 



Involucre oblong, or narrowly campanufate, 3 -6-flowered '' W****' 



Inner bracts with prolonged petaloid tips. , L e j ei r ans 



Bracts all acute, mucronate or acuminate. 3< "***** 



Bracts appressed ; pappus-bristles very plumose. 



Leaves 2-4 mm. wide: spike usually leafy below. 4. L. fiunctata 



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



Tips of the bracts spreading; pappus-bristles barbellate. 6. L. pycnost'achya. 



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

 Bracts of the involucre very obtuse 



Involucre hemispheric, 10-25 mm. broad, i 5 - 4 5-nowered ; heads peduncled. 

 Involucre oblong, 4-8 mm. broad, 5 -i5-flowered 7 ' L ' SCaHosa ' 



Spike eZSld 1 nT'' br H CtS USUa f Uy n0t punctate ' heads mostlv ite- 

 1SK in ? ' v f r y dense ' often 3 dm. long. 8. L. spicata. 



bpike short, exceedingly dense. n / *v-J 



Involucre narrowed at base ; brarts usually very punctate; heads%duSed ' 



Bracts of the involucre acutish, punctate; involucre oblong-campanuSate^ gramAt ^ oli ^ 



ii. L. Smalm. 



i. Lacinaria squarrosa (L.) Hill. SCALY BLAZING STAR, ri F f 16^6 ) 

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

 fed, sparingly punctate, 7-15 cm . longj 2 _ 5 mm . wide; heads sessi , e J J 



e^^^^^^^ 



fc?.??SS^rs^ In dry L> 



" 1 U w i ;^l, t " mMia (Lindl ' ) Porter ' Heads M-^; tips of the bracts 



