68 



Viola vertidllata Ort. Dec. PL 4: 50 (1797). 

 lonidium poly galaefo Hum Vent. Jard. Malam. 27, /. 27 (1803). 

 lonidium linear e Torr. Ann. Lye. N. Y. 2: 1 68 (1827). 

 Plentiful about Corpus Christi from sea level to 40 feet. Usually pro- 

 cumbent and spreading. 

 March 9 (1414). 



LOASACEAE. 



MENTZELIA L. Sp. PL 516 (1753). 



Mentzelia multiflora (Nutt.) A. Gray, Mem. Am. Acad. (II.) 4: 

 48 (1849). 



Bartonia multiflora Nutt. Journ. Acad. Phila. (II). i: 180 (1848). 

 On the left bank of the Guadalupe above Kerrville, in low stony 

 ground, altitude 1600 feet. Plant stout, about 3 feet high. 



June 21 (1896); type locality, "on the Rio Grande." 

 Mentzelia oligosperma Nutt. ; Sims, Bot. Mag. /. 1760 (1815). 



Mentzelia aurea Nutt. Gen. i : 300 (1818). 



Low, dry ground, along Corpus Christi Bay. Stems long, weak, twin- 

 ing over bushes. Flowers bright copper-yellow, open during the middle 

 of the day. 



May 29 (1791) ; type locality, on the Missouri. 



CACTACEAE. 



ECHINOCACTUS Link & Otto, Verhand. Preiss. Gartenb. Verein, 



3: 420 (1827). 



Echinocactus setispinus hamatus Engelm. Proc. Am. Acad. 3 : 

 272 (1856). 



Growing on a sandy elevation at the Oso, in company with Sida 

 Helleri. The yellow flowers open in the afternoon. 



April 9 (1531). 



Echinocactus Texensis Hoepf. in Allg. Gart. Zeit. 15 : 297 (1842). 

 Echinocactus Lindheimeri Engelm. ; A. Gray, Bost. Jour. Nat. 



Hist. 5: 246 (1845). 



In sandy ground along Nueces Bay. Plants about eight inches in 

 diameter. A handsome species with pink flowers. 

 April 3 (1532); type locality, Texas. 



OPUNTIA Mill. Gard. Diet. Ed. 7 (1759). 

 Opuntia Engelmanni Salm-Dyck. Cact. Hort. Dyck 235 (1850). 



Opuntia Lindheimeri Engelm. ; A. Gray, Bost. Journ. Nat. Hist. 

 6 : 207 (1850). 



