COMPOSITE. (COMPOSITE FAMILY.) 243 



of the cylindrical involucre oblong or lanceolate, with recurved or spread ing colored 

 tips. Prairies, from Ind. to Minn., and southward. 



7. L. spicata, Willd. Smooth or somewhat hairy; stems very leafy, 

 stout (2-5 high) ; leaves linear, the lower 3-5-nerved; heads 8-12-flowered 

 ( -\' long), crowded in a long spike ; scales of the cylindrical-bell-shaped invo- 

 lucre oblong or oval, obtuse, appressed, with slight margins ; achenes pubescent or 

 smoothish. Moist grounds ; common from Mass, to Minn., and southward. 

 Involucre often resinous, very smooth. 



Var. montana, Gray. Low and stout; leaves broader, obtuse; spike 

 short and heads large. Mountain-tops, Va., and southward. 



8. L. graminifolia, Willd. Hairy or smoothish; stem (1-3 high) 

 slender, leafy ; leaves linear, elongated, 1-nerved ; heads several or numerous, 

 in a spike or raceme, 7 - 12-flowered ; scales of the obconical or obovoid involucre 

 spatulate or oblong, obtuse, or somewhat pointed, rigid, appressed ; achenes hairy. 

 Va. and southward. Inflorescence sometimes panicled, especially in 



Var. dilbia, Gray. Scales of the involucre narrower and less rigid, oblong, 

 often ciliate. Wet pine barrens, N. J., and southward. 



9. TBILISA, Cass. 



Heads discoid, 5-10-flowered; flowers perfect. Involucral scales nearly 

 equal, little imbricated. Receptacle naked. Corolla-lobes short-ovate or ob- 

 long. Achenes 10-ribbed; pappus of rather rigid bristles, not plumose. 

 Perennial herbs, fibrous-rooted, with broad entire leaves, obscurely or not at 

 all punctate, and cymules of small heads in a thyrse or panicle. Flowers rose- 

 purple, in autumn. (Name an anagram of Liatris.) 



1. T. Odoratissima, Cass. (VANILLA-PLANT.) Very smooth; leaves 

 pale, thickish, obovate-spatulate, or the upper oval and clasping ; heads co- 

 rymbed. (Liatris odoratissima, Willd.) Lowpine barrens, Va., and south- 

 ward. Leaves exhaling the odor of Vanilla when bruised. 



2. T. paniculata, Cass. Viscid-hairy ; leaves narrowly oblong or lan- 

 ceolate, smoothish, those of the stem partly clasping, heads panicled. (Liatris 

 paniculata, Willd.) Va. and southward. 



10. GUTIERREZIA, Lag. 



Heads few -several-flowered, radiate; rays 1-6, pistillate. Involucre ob- 

 long-clavate ; scales coriaceous with green tips, closely imbricated, the outer 

 shorter. Receptacle small, naked. Achenes short, terete ; pappus of about 9 

 chaffy scales, shorter in the ray-flowers. Suffrutescent (our species), glabrous 

 and often glutinous, much branched, with narrowly linear entire alternate 

 leaves, and small heads of yellow flowers in fastigiate or paniculate cymes. 

 (From Gutierrez, a noble Spanish family.) 



1. G. Euthamise, Torr. & Gray. Low; leaves numerous, 1-2' long; 

 heads usually crowded, the disk- and short ray-flowers usually 3 or 4 each. 

 Dry plains, Mont, and Minn, to central Kan., southward and westward. 



11. AMPHIACHYRIS, Nutt. 



Heads hemispherical ; rays 5-10. Disk-flowers perfect but infertile. Pap- 

 pus of the ray minute, coroniform; of the disk-flowers of almost bristle-like 



