Ovary notlobed; filaments bearded. Verbascum, inSCROPHULARlACEAE, 121. 

 1 1 t Corolla irreijular. 

 % Stamens of the .same number as the lobes of the corolla. 

 Ovaries 2, separa'e; stigmas and sometimes the styles united. 

 Filaments distinct; pollen granular. Apocynaceae, 106. 



Filaments monodelphous; pollen in waxy-masses. Asclepiadaceae, 107. 

 Ovary deeply 4-lobed. 

 Leaves alternate. Boreaginaceae, 112. 



Leaves opposite. Mentha, in Labiatae, 133. 



Ovary 1, not deeply lobed, 1-celled, 1-ovuled. Plantaginaceae, 139. 



Ovary 1-celled, with the ovules parietal or in 2 parietal placentae. 

 Leaves opposite. , Gentianaceae, 109. 



Leaves basal or alternate, 3-foliolate. Menyanthaceae, 110. 



Leaves basal or alternate, toothed, lobed, or compound. 



Hydrophyllaceae, 111. 

 Ovary 2—10 celled. 

 Leafless white or yellowish parasitic vines. Cuscutaceae, 116. 



Leaves alternate and stipulate or opposite and exstipulate; stamens in- 

 serted on the tube of the corolla. 



Stamens 4; capsule 2-celled, circumscissile. Plantaginaceae, 139. 

 Stamens 4; ovary 2—4 celled, becoming 2—4 1-seeded nutlets. 



Verbenaceae, 130. 

 Stamens usually 5. 

 Fruit of 4 1-seeded outlets, or of 2 2-seeded carpels. 



Bokraginaceae, 112. 

 Fruit a few-seeded capsule. 

 Calyx 5-cleft; style 3-lobed or 3-cleft. Polemoniaceae, 110. 



Calyx of 5 distinct sepals; styles 1 or 2, 2-cleft or entire; mostly twin- 

 ing vines. 

 Leaves normal. Convolvulaceae, 115. 



Leaves reduced to minute scales. Cuscutaceae, 116. 



Fruit a many-seeded capsule or berry; style solitary. 



SOLANACEAE, 117. 

 % X St a mens less in number than the lobes of the corolla. 

 Stamens 4, didynamous. 

 Ovary 2-celled; cells several-ovuled. Acanthageae, 129. 



Ovary 2— 4-celled; cells 1-ovuled. Verbenaceae, 130. 



Stamens with anthers 2; ovary 4-lobed. Lycopus, in Labiatae, 133. 



Stamens 2; ovary 2-celled. 

 Herbs. Veronica, in Scrophulariaceae, 124. 



Trees or shrubs. Oleaceae, 106. 



Polypetalous forms in gamopetalous families. 

 Ovaries 2, separate. Asclepiadaceae, 107. 



Ovary 1, compound. 

 Stamens 2. rarely 3 or 4; petals 4. Oleaceae, 106. 



Stamens in ours 8 or 10; petals 4 or 5. * 

 Low evergreen perennials. Pyrolaceae, 102. 



Waxy-wbite parasitic plants. Monotropaceae, 103. 



Apetalous iorms in gamopetalous families. 

 Trees or shrubs; fruit a l'-celled 1-seeded samara or drupe. Oleaceae, 106. 



