Spring Flora of Oklahoma 
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or solitary, bracted. Calyx-limb 5-toothed, or truncate. 
Ovary 1-celled, with 1 pendulous ovule. Drupe ovoid or 
oval, the stone bony, compressed, ridged or terete, 1- 
seeded. 
1. Nyssa sylvatica Marsh. Sour Gum. A large tree with rough 
bark. Leaves ovate or oval, acute, acuminate, or obtuse at the apex, 
usually narrowed at the base, entire, glabrous and shining above, 
more or less pubescent beneath, 2'-4' long. Staminate flowers in 
compound capitate clusters. Fruit ovoid, nearly black, 4"-7" long, 
acid. 
In rich, moist soil. April-June. Eastern part of state. 
FAMILY 65. PRIMULACE^E. Primrose Family. 
Herbs, with simple leaves, often most or all of them 
basal. Flowers bi-sexual and actinomorphic, generally 
gamopetalous. Stamens commonly 5, inserted on the 
corolla, opposite its lobes. Pistil consisting of a single 
stigma and style and a (generally free) 1-celled ovary, 
with a free central placenta. 
Lobes or segments of the corolla erect or spreading, 
not reflexed. 
Ovary wholly superior. I. Androsace. 
Ovary adnate to the calyx. II. Samolus. 
Segments of the corolla reflexed; plants scapose. 
III. Dodecatheon. 
I. ANDROSACE (Tourn.) L. 
Low, annual or perennial herbs, scapose, with tufted, 
small, basal leaves, and terminal, umbellate, or solitary 
involucrate small, white, or pink flowers. Calyx 5-lobed, 
cleft or parted. Corolla salver-form or funnel-form, the 
tube short, not longer than the calyx. Stamens 5, in¬ 
serted on the tube of the corolla. Ovary superior, turbin¬ 
ate or globose. Stigma capitellate. Capsule turbinate, 
ovoid or globose, 5-valved, few-many-seeded. 
