Croton alabamensis var. alabamensis
Leaf blades: abaxial surface silvery, scales mostly unpigmented or light amber, some dark blackish brown scales sometimes present. Inflorescences 9–18-flowered, producing 0–11 fruits. 2n = 16, 32.
Phenology: Flowering mostly late Feb–early Apr; fruiting mostly May–Jun.
Habitat: Limestone glades, forest understories, shale or sandstone outcrops, often on steep slopes.
Elevation: 50–150 m.
Variety alabamensis is restricted to Bibb and Tuscaloosa counties. A report of this variety from Tennessee is almost certainly erroneous (K. Wurdack 2006).