| Croton dioicus Cav. | U. T. Waterfall 3884 | United States of America. Texas. El Paso Co. along Highway #62 between El Paso and Heuco, 6 to 16 miles east of El Paso. | | 3963738 |  |
| Croton dioicus Cav. | G. C. Nealley 460 | United States of America. Texas. Presidio Co. Chinatis, W. Tex. | | 3963736 |  |
| Croton dioicus Cav. | L. C. Hinckley 813 | United States of America. Texas. Presidio Co. near Rio Grande. Ruidosa-Presidio road. | | 3963728 |  |
| Croton dioicus Cav. | L. C. Hinckley 813 | United States of America. Texas. Presidio Co. Rio Grande near Chinati Mts. | | 3963765 |  |
| Croton dioicus Cav. | L. C. Higgins 17564 | United States of America. Texas. Presidio Co. about 6 miles east of Presidio along highway 170, near the Rio Grande River. | | 3963802 |  |
| Croton dioicus Cav. | C. L. Hitchcock 4329 | United States of America. Texas. El Paso Co. 10 miles north of Guadelupe Canyon; on El Paso-Carlsbad Highway; 100 mi. east of El Paso. | | 3963754 |  |
| Croton dioicus Cav. | H. C. Hanson 566 | United States of America. Texas. Reeves Co. Fort Stockton to Pecos River. | | 3963781 |  |
| Croton dioicus Cav. | J. K. Small 12001 | United States of America. Texas. Uvalde Co. Chaparral east of Uvalde. | | 3963803 |  |
| Croton dioicus Cav. | L. C. Hinckley 1280 | United States of America. Texas. Terrell Co. Highway 90, 26 m. west Langtry. | | 3963759 |  |
| Croton dioicus Cav. | E. Whitehouse 19642 | United States of America. Texas. Brewster Co. Big Bend National Park, Sublett Ranch on Rio Grande River. | | 3963785 |  |
| Croton dioicus Cav. | E. Whitehouse s.n. | United States of America. Texas. El Paso Co. Hueco sand hills. | | 3963794 |  |
| Croton dioicus Cav. | E. O. Wooton 92 | United States of America. New Mexico. Doña Ana Co. On the mesa near Las Cruces. | | 3963790 |  |
| Croton dioicus Cav. | B. C. Tharp 4367O | United States of America. Texas. Pecos Co. | | 3963752 |  |
| Croton dioicus Cav. | B. C. Tharp 49-1178 | United States of America. Texas. Culberson Co. Valley north of highway. | | 3963734 |  |
| Croton dioicus Cav. | B. C. Tharp 49-1178 | United States of America. Texas. Culberson Co. Valley north of highway. | | 3963747 |  |
| Croton dioicus Cav. | R. Corral Diaz 195 | Mexico. Durango. Santiago Papasquiaro Mun. 3.5 km al Oeste de La Soledad, 11 km NW Santiago Papasquiaro. | | 3974695 |  |
| Croton dioicus Cav. | D. Seigler DS9268 | Mexico. Coahuila. Saltillo Mun. Paso de Carneros. | | 3974682 |  |
| Croton dioicus Cav. | V. W. Steinmann 777 | Mexico. Puebla. San José Chiapa Mun. along Highway 129, 11 km (by road) southwest of Tequixuitla. | | 3974693 |  |
| Croton dioicus Cav. | D. B. Dunn 16123 | United States of America. Texas. Pecos Co. 13 miles west of Bakersfield. | | 3963742 |  |
| Croton dioicus Cav. | D. S. Seigler DS8544 | United States of America. Texas. Pecos Co. 2.5 miles east of Intersection 349 and 29. | | 3963716 |  |