222 Engelmann and Gray, 



106. Palafoxia Texana, DC. Wet prairies, Houston. 

 August. Annual, as is P. Hookeriana also. 



107. Hymenopappus artemisijefolius, DC. Open oak 

 woods, &c. ; west of Houston, &c. ; flowering from March to 

 September. Radical leaves very variable. 



108. Helenium tenuifolium, JSutt, Open woods. Sep- 

 tember. 



109. Leptopoda brachypoda, /S (purpurea.) Torr. fy 

 Gr. Fl. II. p. 388. May. 



110. Marshallia cjespitosa, Nutt. Dry prairies, Hous- 

 ton, &c. The specific name is singularly inappropriate, at 

 least as applied to the Texan plant ; for the stems are single, 

 scattered, and not at all ccespitose. The lowest leaves are 

 often lanceolate-oblong or spatulate. 



111. Egletes Arkansana, Nutt.; Torr. ^ Gr. Fl. II. p. 

 411. (E. Texana, En gel. MSS., but agrees very well with 

 the original Arkansan plant. A. Gr.) Downs of Galveston 

 Island, April, May, and also in November, when it has very 

 diffuse and decumbent stems, somewhat woody at the base ; 

 but the plant is surely annual. After flowering, the tube of 

 the corolla of the outer disk-flowers, as well as those of the 

 ray, become enlarged and corky at the base ; and the inner 

 part of the disk is sterile. It is quite a handsome plant in 

 cultivation. The numerous rays are pure white above, and 

 usually marked with pink underneath. 



112. Gnaphalium purpureusi, Eiixn. var. (G. spicatum, 

 Lam. ?) April. 



113. Cirsium Virgini anum, Michx. Open woods. March 

 to May. 



114. Centaurea Americana, Nutt. Moist fertile prairies, 

 Houston. July. 



115. Pyrrhopappus Carolinianus, DC. Dry prairies. 

 May, June. 



116. Lobelia glandulosa, Walt. Wet prairies and woods. 

 September. A more or less scabrous form : bracts lanceolate 

 from a broad base ; the sinuses of the calyx very slightly re- 



