KEY TO THE ORDERS 3 



Petals more or less united. 



Stamens free from the corolla or diadelphous. 



Gynoeclum of a single carpel. ROSALES: 122. 



Gynoecium of 2-several united carpels. 



Filaments united, diadelphous, some of the sepals spurred. 



Papaveraceae: 57. 

 Filaments distinct or sepals not spurred. 



Herbs with green leaves. GERANIALES: 80. 



Shrubs or saprophytic herbs. ERICALES: 94. 



Stamens partially adnate to the corolla. 



Stamens as many as the lobes of the corolla and onnosite 

 them, or more; ovary 1 celled. PRIMULALES: 92. 



Stamens as many as the lobes of the corolla and alternate 

 with them, or fewer. 

 Corolla scarious, marcescent, fruit a pyxis in our species. 



Plantaginaceae: 93. 

 Corolla not scarious, fruit not a pyxis. 

 Flowers regular or stamens five. 



Ovary 1-celled, with central placentae, or carpels dis- 

 tinct or nearly so. GENTIANALES: 105. 

 Ovary usually 2-3-celled, if one celled with parietal 

 placentae. POLEMON lALES: 95. 

 Flowers irregular or fertile stamens only 4 or 2. except in 

 Verbascum. 

 Fruit 1-4 seeded, usually separating into l-seed^d nut- 

 lets. ^ LAMINALES: 116. 

 Fruit a 6-many seeded capsule. SCROPHU LALES: 110. 

 B. Corolla wanting. 



Flowers, at least the staminate. in aments. 

 Fruit a one-seeded nut or achene. SAP IN DALES: 154. 



Fruit a many seeded capsule, seeds with a tuft of hairs. 



Sallcaceae: 68. 

 Flowers, at least the staminate, not in aments. 



Gynoecium of one or of several distinct carpels, each with a 

 single style. 

 Carpels several. 



Stamens inserted below the carpels. RANALES: 51. 



Stamens inserted on the margin of a disk or a hvpanthium 



ROSALES: 122. 

 Carpel solitary. 



Ovary not enclosed in a hypanthium. 



Land plants. ' MALVALES: 89. 



Submerged aquatics, flowers solitary in the axils. 



Ceratophyllaceae: 57. 

 Ovary enclosed in a hypanthium. 



Shrubs or trees, calyx not corolloid. Eleagnaceae: 153. 

 Herbs, calyx corolloid. Nyctaginaseae: 70. 



Gynoecium of 2 or more united carpels; if one celled styles and 

 stigmas more than one. 

 Herbs. 



Flowers perfect; stamens several. CARYOPHYLLALES: 64. 



