Plantas Lindheimeriana. 241 



amplexicaulibus repando-dentatis subintegrisve ; petalis obova- 

 to-spathulatis sepala pilosa colorata subduplo superantibus ; 

 filamentis e basi inflata abrupte subulatis ; antheris linearibus ; 

 ovarii loculis 3-4-ovulatis ; stylo cum stigmate globoso siliculis 

 vix stipitatis globosis glabris breviore ; seminibus subsex mar- 

 ginatis. — Dry prairies near San Felipe. Feb. — March. 



218. Nasturtium tanacetifolium, Hook, fy Am. Sandy 

 bottoms. February and March. — Siliques sometimes spread- 

 ing or even reflexed : in other cases considerably incurved and 

 erect. 



219. Sisymbrium canescens, Nutt. A very canescent form. 

 April — May. 



220. Polygala alba, Nutt. (P. Beyrichii, Torr. fy Gr.) 

 Prairies. April — May. Lower leaves sometimes obovate- 

 spatulate. 



221. Hypericum maculatum, Walt., Torr. fy Gr. Margin 

 of woods from Galveston to the Colorado. May. 



222. Paronychia dichotoma, Nutt. Sandstone rocks near 

 Industry. Sept. — Oct. 



223. Arenaria Pitcheri, Nutt. Prairies. March. Petals 

 emarginate. 



224. Ptelea trifolata, (3. mollis, Torr. fy Gr. Fl. I. p. 

 680. Along water-courses. Houston to the Colorado. April. 



225. iEscuLus Pavia, (3. discolor, Torr. fy Gr. Thickets 

 along the banks of Mill creek. March. 



226. Sapindus marginatus, Willd. Popularly called 

 " Wild China-tree," forming trunks about a foot in diameter, 

 in fertile woods. The specimens with ripe fruit were gath- 

 ered in August. 



227. Rhamnus Carolinianus, Walt. Small trees forming 

 thickets in wet places on the prairie west of San Felipe ; flow- 

 ering in May. With it there is a small-leaved variety, with 

 the flowers more crowded, &c. 



228. R. lanceolatus, Pursh. Thickets. March. 



229. Tephrosia onobrychoides, Nutt. ; with short and 

 rusty pubescence, &c, differing somewhat from the variety 

 distributed under No. 32. West of San Felipe. May. 



