48 
Spring Flora of Oklahoma 
flower. A high climbing vine, the branches more or less pubescent* 
Leaves pinnate. Leaflets entire, lobed or trifoliolate, thick, reticul¬ 
ate, generally mucronate. Flowers solitary. Calyx campanulate, 
purplish pubescent. Sepals with recurved margined tips. 
Rich soil. May-August. Oklahoma to McCurtain counties. 
FAMILY 26. PAPAVERACE^E. Poppy Family. 
Annual or perennial herbs, often with milky juice. 
Leaves usually alternate without stipules. Flowers per¬ 
fect, regular. Sepals usually 2, shed as the flower opens. 
Petals 4-12, falling early. Stamens many. Carpels 2-16. 
Fruit a capsule. 
I. ARGEMONE L. 
Glaucous herbs, with yellow sap, spiny-toothed leaves 
and large showy flowers. Sepals 2 or 3. Petals 4-6. Sta¬ 
mens many. Style very short or none. Stigma dilated, 
3-6-radiate. Capsule prickly, oblong. Seeds numerous, 
cancellate. 
Flowers distinctly peduncled; spines of the sepal-tips 
nearly erect. 1. A. alba. 
Flowers sessile or nearly so; spines of the sepal-tips 
spreading. 2. A. intermedia. 
1. Argemone alba Leatib. White Prickly poppy. Leaves pin- 
natifid or pinnately lobed, glaucous or green, not blotched, but some¬ 
times whitish along the veins. Flowers white, 3'-4' broad, distinctly 
peduncled. Petals rounded. Spines of the sepal-tips stout. Capsule 
1'-!%' long. 
Dry prairies or plains. Common. May-August. 
2. Argemono intermedia Sweet. Leafv white Prickly Poppy. 
Stem stout, prickly, glabrous and glaucous. Leaves lobed or pinnat- 
ifid, very prickly, usually whitish-blotched. Flowers large, white, 
sessile or nearly so, 3'-4' wide. Petals rounded. Spines of the sepal- 
tips spreading. Capsule oblong, prickly, about V long. 
Prairies and plains. May-August* 
