232 Plantce Lindheimeriana. 



f S. Riddellii, Torr. fy Gray. Fl. 2. p. 444. Rocky hill- 

 tops, between the Upper Guadaloupe and the Pierdenales, 

 and in open Post-Oak woods. October. 



446. Leria nutans, DC. Prodr. 7. p. 42. Cedar woods, 

 in rocky soil, New Braunfels. March. 



447. Apogon gracilis, D C. ! Prodr. 7. p. 78. In patches, 

 on high, rocky prairies, New Braunfels. April. — Larger in 

 all its parts than the ordinary A. humilis, and perhaps to be 

 distinguished from it. 



448 (& 650). Pinaropappus roseus, Less. Syn. p. 143 ; 

 DC. Prodr. 5. p. 99. Troximon Roemerianum, Schetle in 

 Linncea, 22. p. 165. High, rocky prairies, between Bexar 

 and New Braunfels. April. Liguke white, a little reddish 

 on the back. Roots penetrating very deeply. 



(651.) Lygodesmia aphylla /5. Texana, Torr. &f Gray, 

 FL 2. p. 485. Calcareous soil, New Braunfels. May. — It 

 often bears a tuber at the apex of the long root. The margi- 

 nal achenia are more or less attenuated upwards, as is also 

 the case in the Florida plant. 



%* No. 337, " Linum Boottii y. rupesire, p. 155, is cer- 

 tainly a distinct species, as Dr. Engelmann had stated. It 

 may be characterized as follows : — 



337. Linum rupestre (Engehn. ined.) : perenne, glaber- 

 rimum ; caulibus e radice lignescente plurimis strictis gracili- 

 bus (1-2-pedalibus) striato-angulatis superne corymboso- 

 paniculatis ; foliis lineari-subulatis mucronulatis ; glandulis 

 stipularibus conspicuis post lapsum foliorum persistentibus ; 

 pedicellis calyce subbrevioribus ; sepalis ovatis cuspidato- 

 acuminatis margine glanduloso-ciliatis petalis flavis multoties 

 brevioribus; filamentis sterilibus dentibusque plane nullis ; 

 stylis a basi discretis ; capsula ovato-globosa calycem sequanti- 

 bus, loculis bilocellatis. — Growing from the crevices of naked 

 rocks, New Braunfels, also gathered at Comanche Spring, 



