Genus io.] 



THISTLE FAMILY. 



319 



I. Trilisa odoratissima (Walt.) 



Cass. \'anilla-leaf. \'anilla-plant. 



Dog's-tongue. Carolina \'anilla. 



(Fig. 3645.) 



Anonymos odoratissima Walt. Fl. Car. 198. 



1788. 

 Liair is odoratissima Miclix. Fl. Bor. Am. 2: 



93. 1803. 

 Trilisa odoratissima Cass. Bull. Soc. 



Philom. 1818: 140. 1818. 



Rather stout, glabrous, 2°-^° high. 

 Leaves thick, entire, or sometimes dentate, 

 the lower oblanceolate, oblong or spatu- 

 late, obtuse, 4'-io' long, I'-i'/i' wide, 

 those of the stem gradually smaller, ob- 

 long, ovate or oval, the uppermost bract- 

 like; heads corymbose-paniculate, about 

 3" high; bracts of the involucre oblong, 

 obtusish; acheues glandular-pubescent. 



In pine-barrens. Virginia (accordingtoWat- 

 son and Coulter) to Florida and Louisiana. 

 Called also Deer's-tongue and Hound 's- 

 tongue. Aug.-Sept. 



2. Trilisa paniculata (Walt.) 

 Cass. Hairy Trilisa. (Fig. 3646.) 



Anonymos panicitlaius Walt. Fl. Car. 198. 



1788. 

 Liatris paniculata Michx. Fl. Bor. .\m. 2: 



93. 1803. 

 Trilisa paniculata Cass. Bull. Soc. Philom- 



1818: 140. 1818. 



Stem viscid-pubescent, i°-3° high. 

 Leaves entire, the basal ones lanceolate 

 or narrowly oblong, acute or obtusish, 3'- 

 10' long, yi'-iyi' wide, those of the stem 

 much smaller, lanceolate or oblong- 

 lanceolate; heads thyrsoid-paniculate, 

 about 3" high; bracts of the involucre 

 oblong, obtusish; achenes finely pubes- 

 cent. 



In pine barrens, Virginia to Florida and 

 Georgia. Sept.-Oct 



10. GUTIERREZIA Lag. Gen. & Sp. Nov. 30. 1816. 



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

 tire alternate leaves, and small heads of both tubular and radiate yellow flowers, corym- 

 bosely 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. Anthers obtuse and entire at the base. Style- 

 branches narrow, flattened, their appendages slender. .Achenes terete, ribbed or 5-angled. 

 Pappus of several scales, those of the ray-flowers shorter than or equalling those of the 

 disk. [Named from Gutierrez, a noble Spanish family.] 



.Vbout 20 species, natives of western North .\merica. Mexico and western South America. Be- 

 sides tlie following 4 others occur in the southwestern IJnited States. 



