14 Engelmann and Gray, 
106. Panaroxia Texana, DC. Wet prairies, Houston. 
August. Annual, as is P. Hookeriana also. 
107. Hymenoparrpus arremisimrouivus, DC. Open oak 
woods, &c.; west of Houston, &c.; flowering from March to 
September. Radical leaves very variable. 
108. Hevenium Tenurrouium, Nutt. Open woods. Sep- 
tember. : 
109. Lerropopsa BracHypopa, Q (purpurea.) Torr. & 
Gr. Fl. Il. p. 388. May. 
110. Marswatiia cxspitosa, 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 cespitose. The lowest leaves are 
often lanceolate-oblong or spatulate. 
111. Eereres Arxansana, Nutt.; Torr. & Gr. Fl. Il. p. 
411. (KE. Texana, Engel. 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 purPUREUM, Linn. var. (G. spicatum, 
Lam.?) April. 
113. Crrstum Virein1anum, Michx. Open woods. March 
to May. 3 
114. Centaurea Americana, Nutt. Moist fertile prairies, 
Houston. July. 
115. Pyrruoparpus Caroxinianus, DC. Dry prairies. 
May, June. 
116. Losen1a cuanpuLosa, 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- 
