Astraea

Sodré, Rodolfo C., Berry, Paul E. & Da Silva, Marcos J., 2017, The tribe Crotoneae (Euphorbiaceae, Crotonoideae) in the Chapada dos Veadeiros, Goiás, Brazil, Phytotaxa 321 (1), pp. 1-59 : 4

Key to the species of Astraea

1. Leaves lobed or rarely unlobed in the same plant; stipules 1.5–3.5 × 0.2–0.3 mm, linear-lanceolate, with subgloboid glands at the base; sepals of pistillate flowers without glands ............................................................................................................ 1.2. A. lobata

- Leaves unlobed; stipules 0.3–0.5 mm long, palmate-glandulose; sepals of pistillate flowers with glands ............... 1.1. A. gardneri