Flora of the Southeastern United States
2022 Edition


Data mode


Sign up

No key was found for the requested taxon, but it is the only child of Chamaenerion. Showing where it is keyed below.

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.

Key to Onagraceae

1 Flowers 2-merous, the petals white; fruits with uncinate trichomes; leaves opposite, decussate, borne spreading at right angles to the stem, mostly ovate, on petioles mostly 0.5-8 cm long; [subfamily Onagroideae; tribe Circaeeae]
1 Flowers (3-) 4 (-7)-merous, the petals yellow, pink, or white (or absent); fruits lacking uncinate trichomes; leaves alternate (rarely opposite), not decussate, usually ascending or appressed (rarely spreading at right angles to the stem), mostly lanceolate, mostly sessile or subsessile.
..2 Fruit indehiscent; seeds 1-6 per capsule, 1.5-3.5 mm long; [subfamily Onagroideae; tribe Onagreae]
..2 Fruit dehiscent; seeds (10-) 50-many per capsule, 0.3-2 mm long.
....3 Seeds with an elongate coma at one end (wind-dispersed); petals pink or white; [subfamily Onagroideae; tribe Epilobieae].
......4 Leaves all alternate; flowers numerous in a terminal raceme (with small bracts); flower buds reflexed, the flowers held horizontally or ascending; petals 10-20 mm long; stigma 4-lobed; plants 10-30 dm tall
......4 Leaves all or at least the lowermost opposite; flowers few, axillary, or in poorly developed, leafy racemes; flower buds not reflexed, the flowers ascending; petals 2-8 mm long (except 10-15 mm long in E. hirsutum); stigma capitate (except 4-lobed in E. hirsutum); plants 1-20 dm tall
....3 Seeds not comose (gravity-dispersed); petals yellow or absent (rarely white or pink).
........5 Calyx tube not extended beyond the summit of the ovary; sepals persistent on the capsule (rarely deciduous); stamens 4, 8, or 10-14; petals yellow or absent; [primarily of wetlands]; [subfamily Ludwigioideae]
........5 Calyx tube extended beyond the summit of the ovary; sepals deciduous; stamens 8; petals yellow (rarely pink or white); [primarily of uplands]; [subfamily Onagroideae; tribe Onagreae]