Spring Flora of Oklahoma 
2a. Stamens numerous, at least more than 10 and more than 
twice the petals. 
3a. Carpels more than 1, distinct, or only slightly adherent 
with each other. 
4a. Stamens inserted on the receptacle. 
5a. Stamen filaments much shorter than the anthers; 
perianth 3-parted; leaves entire, alternate, without 
stipules, 2-ranked. 
24. ANONACEJE. 43 
5b. Stamen filaments longer than the anthers; flowers 
perfect; herbs; or climbers with opposite leaves. 
25. RANUN C'ULA CEAE. 44 
4b. Stamens distinct, inserted on the perigynous disk, with 
the calyx; leaves alternate, usually with stipules. 
34. ROSACE/E. 61 
3b. Carpels 1 or more, united, but styles and stigmas may be 
several. 
4a. Ovary simple, 1-celled, placenta 1 parietal, many-ovuled 
or two-ovuled. 
5a. Leaves ternately compound or dissected; herbs. 
25. RANUNCULACE/E. 44 
5b. Leaves simple: trees or shrubs with 1-seeded drupes. 
35. AMYGDALACEZE. 63 
4b. Ovary compound, 1-celled with 2 or more parietal plac¬ 
entae. 26. PAPAVERACE/E. 48 
4c. Ovary compound, many-celled. 
5a. Herbs. 
6a. Sepals 5; petals many, which may be small and 
glandular; leaves alternate, finely dissected. 
25. RANUNCULACE/E. 44 
6b. Calyx persistent, stamens united by their filaments 
into a tube; leaves alternate, palmately-veined, 
with stipules. 
57.. MALVACEAE. 108 
6c. Inflorescence usually a cyathium; leaves opposite, 
alternate or verticillate; ovary 3-celled with 1 or 
2 ovules in each cavity; styles 3. 
46. EUPHORBIACEAE. 89 
5b. Woody plants. 56. TILIACEiE. 107 
2b. Stamens of the same number as the petals and opposite them. 
3a. Monoecious or dioecious herbs; ovary mostly 3-celled with 
3 simple or cleft styles. 
46. EUPHO RBI ACE/E. 89 
3b. Perfect. 
4a. Ovary 2-5 celled. 
