Spring Flora of Oklahoma 
viii 
9a. Ovules solitary, stigmas 3; shrubs; leaves ex- 
stipulate. 
47. ANACARDIACEiE. 95 
9b. Ovules solitary or few; herbs having leaves 
without stipules. 
28, CRUCIFERiE. 50 
9c. Ovules 2 or more; sepals 2; herbs with fleshy 
leaves. 21. PORTULACACE^E. 39 
8b. Leaves opposite. 
9a. Petals not united with the calyx; herbs with 
opposite entire leaves; stems usually swol¬ 
len at the joints. 
10a. Sepals distinct; ovary sessile. 
22. ALSINACEiE. 40 
10b. Sepals united; ovary stipitate. 
23. CARYOPHYLLACEiE. 43 
9b. Petals united with the calyx; herbs mostly 
with opposite, entire leaves and no stipules. 
61. LYTHRACE^E. 114 
9c. Petals free, sepals 2; herbs with fleshy leaves. 
21. PORTULACACEiE. 39 
6b. Corolla irregular. 
7a. Corolla zygomorphic; petals and stamens 5; herbs 
with alternate or opposite stipulate leaves. 
58. VIOLACEAE. 110 
7b. Corolla irregular; petals 4; stamens 6, sepals 
2, minute, herbs, usually with alternate leaves 
with stipules. 
27. FU MARI A CE'iE. 49 
5b. Ovary 2-celled to many-celled. 
6a. Corolla irregular. 
7a. Trees or shrubs with opposite, palmately-com- 
pound leaves; ovary 3-celled. 
52. iESCULACEiE. 102 
7b. Herbs, or somewhat shrubby plants, with simple 
leaves. 
8a. Stamens 6-8; ovary 2-celled, 2-ovuled. 
45. POLYGALACEiE. 88 
8b. Stamens 11-12; ovary 2-6 celled. 
61. LYTHRACE.E. 114 
6b. Corolla regular or nearly so. 
7a. Stamens neither just as many nor twice as many 
as the petals. 
8a. Stamens 6, four long and two short; petals 4. 
28. CRUCIFER^E. 50 
