20 Karl M. Wiegand and Arthur J. Eames 



page 

 /. Herbs. (2d /, p. 21.) 

 g. Stamens perigynous. 



h. Leaves compound, leaf and leaflets with pulvini; flowers often 



papilionaceous Leguminosae 270 



h. Leaves simple or compound, without pulvini ; flowers not 

 papilionaceous. 

 *. Anthers usually long and curved, opening by terminal pores. 



Melastomaceae 312 

 i. Anthers opening longitudinally. 



j. Sepals 2 Portulacaceae 204 



j. Sepals 5 or calyx 5-lobed. 



k. Ovaries 1-several, 1 -celled, or if 2-celled then deeply 

 lobed. 



/. Carpels 2 ; fruit not bur-like Saxifragaceae 237 



/. Carpels 2-many ; fruit often bur-like Rosaceae 241 



k. Ovary 1, 2-5-celled, not plainly lobed Lythraceae 311 



g. Stamens hypogynous. 



/;. Stamens monadelphous or diadelphous, at least below. 

 i. Flowers irregular. 

 j. Corolla or calyx spurred or saccate. 



k. Ovary 1-celled Fumariaceae 221 



k. Ovary 5-celled Balsaminaceae 295 



/. Corolla and calyx not spurred nor saccate ; petals fringed. 



Polygalaceae 286 

 i. Flowers regular. 



j. Ovary 1-celled; corolla spurred or saccate. . .Fumariaceae 221 

 j. Ovary 1-celled; placenta free-central; stamens opposite the 



petals Primulaceae 337 



j. Ovary 4-many-celled ; placentae axial ; stamens alternate 

 with the petals, or more numerous than the petals. 

 k. Stamens very numerous, united more than half their 

 length, forming a central column around the pistil. 



Malvaceae 298 

 k. Stamens united only at base. 



/. Stamens 10 ; leaves 3-foliolate Oxalidaceae 283 



I. Stamens 5 ; leaves simple Linaceae 282 



/;. Stamens separate (rarely united in fascicles in Hypericaceae). 

 i. Pistils 2-many, distinct. 



j. Leaves peltate ; aquatic plants Nymphaeaceae 205 



j. Leaves not peltate. 



k. Petals 3, white ; monocotyledons Alismaceae 53 



k. Petals 4 or more, often colored ; dicotyledons. 



/. Leaves scarcely fleshy Ranunculaceae 207 



/. Leaves very fleshy Crassulaceae 236 



i. Pistil solitary. 



j. Ovary 1-celled. (2d /, p. 21.) 



k. Plants insectivorous ; leaves covered with glandular 



tentacles Droseraceae 235 



k. Plants not insectivorous ; tentacles wanting. 

 /. Styles 2-9 or 2-9-parted. 



m. Sepals 2 (3) Portulacaceae 204 



m. Sepals 4-5, distinct or united. 



n. Disk cup-shaped, glandular, at base of ovary. 



Resedaceae 235 



