68 
Spring Flora of Oklahoma 
Trees; leaves pinnate or bi-pinnate; flowers dioecious 
or polygamous. 
Receptacle short; stamens 3-5; pod flat, short or 
elongated. III. Gleditsia. 
Receptacle elongated; stamens 10; pod oblong, 
woody. IV. Gymnocladus. 
I. CERCIS L. 
Trees. Leaves simple, with stipules. Flowers in ax¬ 
illary clusters, somewhat papilionaceous. Calyx bell- 
shaped, 5-toothed. Stamens 10, distinct. Ovary short- 
stalked; ovules several. Fruit a flattened pod. 
1. Cercis canadensis L. Red-bud. A tree or often shrubby. 
Leaves simple, petioled, cordate-orbicular, blunt-pointed, glabrous, or 
pubescent along the veins beneath. Flowers several together in 
sessile, umbellate clusters, appearing before the leaves. Corolla pink- 
purple. Pod short-stalked in the calyx, linear-oblong, acute at each 
end, glabrous, 2'-3' long, G" wide. 
In rich soil. April. Common. 
II. HOFFMANSEGGIA Cav. 
Herbs, or low shrubs, with glandular-punctate bi- 
pinnate leaves, small stipules, and yellow flowers in ter¬ 
minal or lateral racemes. Calyx deeply 5-parted, the 
lobes nearly equal. Petals 5, nearly equal. Stamens 10, 
distinct, filaments often glandular at the base. Pod flat, 
linear, oblong or ovate, curved or straight, 2-valved, sev¬ 
eral seeded. 
1. HofTmanseggia falcana Cav. Sickle-fruited Hoffmanseggia. 
Herbaceous, puberulent, not black-punctate, the glands of the ped^ 
uncles and petioles stalked. Stems ascending or decumbent. Leaves 
slender-petioled, bi-pinnate. Pinnae 7-11. Leaflets 12-21. The blades 
mainly oblong, l"-3" long. Racemes few, several-flowered. Pods 
flat, linear-oblong, curved or nearly straight, l'-iy 2 ' long, about 3" 
wide, blunt, the fruiting pedicels recurved. 
On plains and prairies. Southwest part of state. April-June. 
III. GLEDITSIA L. 
Large, thorny trees. Leaves evenly once or twice pin- 
