Adenopetalum
| Adenopetalum Klotzsch & Garcke, in Klotzsch, Monatsber. Königl. Preuss. Akad. Wiss. Berlin 1859: 250. 1860, non Turczaninow 1858. | | TYPE: Adenopetalum gramineum (Jacquin) Klotzsch & Garcke 1860. (Euphorbia graminea Jacquin 1763.) Lectotypified by L. C. Wheeler, Contr. Gray Herb. 127: 48. 1939. |
Adenorima
| Adenorima Rafinesque, Fl. Tellur. 4: 112. 1838 ("1836"). | | TYPE: Adenorima punicea (Swartz) Rafinesque (Euphorbia punicea Swartz) |
Agaloma
| Agaloma Rafinesque, Fl. Tellur. 4: 116. 1838 ("1836"). | | TYPE: Agaloma corollata (Linnaeus) Rafinesque (Euphorbia corollata Linnaeus) Lectotypified by Rafinesque, Autik. Bot. 95. 1840. |
Aklema
| Aklema Rafinesque, Fl. Tellur. 4: 114. 1838 ("1836"). | | TYPE: Aklema nudiflora (Jacquin) Rafinesque (Euphorbia nudiflora Jacquin) |
Alectoroctonum
| Alectoroctonum Schlechtendal, Linnaea 19: 252. 1846. | | TYPE: Alectoroctonum socotanum Schlechtendal Lectotypified by L. C. Wheeler, Amer. Midl. Naturalist 30: 459. 1943. |
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