Spring Flora of Oklahoma 
115 
globose or ovoid, 4-angled, 4-toothed, often with small ap¬ 
pendages in the sinuses. Petals 4. Stamens 4-8 inserted 
on the calyx-tube. Ovary enclosed in the calyx-tube, nearly 
globular, 2-4-celled. 
1. Animannia auriculata Willd. Wright’s Ammannia. Erect, 
at length widely branching. Leaves sessile, linear-lanceolate or 
oblong, auriculate at the base. Flowers in axillary, peduncled cymes. 
Petals purple. Capsule partly enclosed by the calyx. 
Low ground. May-June. Frequent. 
FAMILY 62. ONAGRACEiE. Evening Primrose Family. 
Herbs, rarely shrubs or trees. Leaves opposite or al¬ 
ternate, without stipules. Flowers actinomorphic. Limb 
of the calyx epigynous, 2-4-lobed. Petals 2-4, rarely want¬ 
ing, quickly falling off. Stamens 1-8. Ovary usually 4- 
celled. Style thread-like. Stigma entire or 4-lobed. 
Ovules 1 or more in the inner angle of each cell. Fruit 
a capsule, berry, or drupe. Seeds 1 or more, smooth or 
hairy. 
Key to Genera of Onagraceae. 
1. Fruit a many-seeded capsule, opening by valves or 
by a pore. 
Stamens equal in length. 
Stigma deeply 4-cleft, its segments linear. 
I. Raimannia. 
Stigma entire or slightly 4 toothed. 
Calyx-tube longer than the ovary; stigma disk¬ 
like, entire. VI. Galpinsia. 
Calyx-tube shorter than the ovary; stigma disk¬ 
like, slightly 4-toothed. VII. Meriolix. 
