Click the number at the start of a key lead to highlight both that lead and its corresponding lead. Click again to show only the two highlighted leads. Click a third time to return to the full key with the selected leads still highlighted.
1 Leaf blades linear to narrowly oblanceolate, 3-6 mm wide; [e. TX westwards and southwestwards]
..2 Leaves (6-) 7-8 (-9) cm long, long-acuminate or acuminate (rarely acute) at the apex, the tip sharply pointed; [of swamp forests, sloughs, and ponds]
....3 Leaves evergreen, glabrous above, glabrous and punctate below; leaf margins entire.
......4 Leaf blades with veins opaque; lower leaf blade surface not evidently punctate; [OK and inland TX westwards]
........5 First-year twigs pubescent, the pubescence evenly distributed (not in 2 lines); petioles moderately pubescent; flowering in early spring from buds on twigs of the previous season; leaves 5-7 (-8) cm long
........5 First-year twigs pubescent, the pubescence in 2 lines on either side of the twig; petioles glabrous (or with a very few hairs; flowering in mid-late summer, the flowers in leaf axils; leaves mostly 2-5 cm long