Spring Flora of Oklahoma 
93 
V. CNIDOSCOLUS Pohl 
Perennial monoecious herbs or shrubs, with stinging- 
bristly foliage, and entire, lobed, or divided petioled leaves, 
the flowers in cymes. Flowers apetalous. Staminate flowers 
on the upper part of the cymes, with a corolla-like, 5-lobed 
calyx, the -stamens usually numerous (10 or more) and in 
several series, their filaments mostly united at the base. 
Pistillate flowers in the lower forks of the cymes. Capsule 
ovoid or sub globose, easily separating into 2-valved car¬ 
pels. 
1. Cnidoscolus stimulosus (Michx.) Engelm & Gray. Spurge 
Nettle. Perennial herb, armed with stinging hairs. Stem 4'-3%° 
tall. Leaves nearly orbicular in outline,' 3'-12' broad, truncate, or 
cordate at the base, deeply 3-5-lobed, the lobes entire, toothed or pin- 
natifid. Calyx of the staminate flower salver-form, white or pink, 
10"-20" broad. Capsule oblong, 5"-8" long, papillose, wrinkled. 
In sandy soil. March-August. Central part of the state. 
V. CHAMAESYCE S. F. Gray. 
Annual or perennial herbs or shrubs. Stems often ra¬ 
dially branched at the base, the branches ascending or 
prostrate, sometimes creeping, forking. Leaves entire or 
toothed, more or less oblique at the base, opposite. Involu¬ 
cres solitary in the axils or in axillary cymes. Glands 4, 
sessile or stalked. Capsule smooth, sometimes pubescent, 
the angles sharp or rounded. 
Leaves entire; seeds smooth. 1. C. serpens. 
Leaves serrate or dentate; plants prostrate or spreading. 
Herbage glabrous. 2. C. serpyllifolia. 
Herbage pubescent, or puberulent. 3. Preslii. 
1. Chamaesyce serpens (H.B.K.) Small. Round-leaved 
Spreading Spurge. Annual, glabrous. Stem prostrate, 2'-12' long, 
much branched. Leaves orbicular to oval, l"-3" long, entire. In¬ 
volucres solitary in the axils, bearing 4 glands. Capsule nodding, 
1" in diameter. 
Prairies. March-October. 
2. Chamaesyce serpyllifolia (Pers.) Small. Thyme-leaved 
Spurge. Annual, dark green or becoming reddish, glabrous. Stem 
prostrate or ascending, 4'-12' long, Leaves oblong to spatulate, 
