XXVU1 ANALYTICAL KEY. 



Ovary wholly inferior in perfect or pistillate flowers. 



Aquatic herbs : ovary 3-4-celled, or (Hippuris) 1-aelled. 129 HALORAGBJS. 

 Woody plants : style or stigma one, entire : ovary 1 -celled. 



Stigma running down one side of the style. Nyssa, 160 CORNACEJE. 



Stigma terminal, with or without a style. 



Parasitic on the branches of trees : anthers sessile. 382 LORANTHACE.S:. 

 Not parasitic above ground : anthers on filaments. 381 SANTALACE^J. 

 Ovary really free from the calyx, but permanently invested 



by its tube, or the base of it, so as to seem inferior. 



Shrubs, with scurfy leaves : flowers mostly dioscious. 380 EL^AGNACEJE. 

 Herbs : calyx colored like a corolla. 



Leaves opposite, simple 360 (74) NYCTAQINACE.E. 



Leaves alternate, pinnate. . . ,,; : , *.,-,> . Sanguisorba, 110, ROSACEJE. 

 Ovary plainly free from the calyx, which is sometimes wanting. 

 Stipules (ochreae) sheathing the stem at the nodes. 



Tree : calyx none : flowers monoecious, in heads. 400 PLATANACE^E. 



Herbs : calyx present and often colored. 371 (75) POLTGONACE^B. 



Stipules not sheathing the stem, or none. 

 Aquatic herbs, submersed or nearly so. 



Leaves whorled-dissected : style 1. . . 383 CERATOPHYLLACE*:. 

 Leaves opposite, entire : styles 2 : ovary 4-celled. 384 CALLITRICHACEJE. 

 Not aquatics, herbs. 



Ovary 10-celled : berry 10-seeded. *.. +>: 361 PHYTOLACCACEJE. 

 Ovary 3-celled, rarely 1 - 2-celled : juice milky. 385 (76) EUPHORBIACE^B. 

 Ovary one-celled : juice not milky. 

 Style, if any, and stigma only one : leaves simple : 



no scarious bracts around the flowers. ,:..,. . .394 URTICEJB. 

 Style or stigmas 2 or 3 : embryo coiled or curved. 

 Stipules not scarious : leaves palmatcly cleft 



or palmately compound. ; !. 395 (76) CANNABINE^E. 

 Stipules scarious. . . .^.. : ; -f 1 54 ILLECEBRE^E. 

 Stipules and scarious bracts none : stamens 



inserted high up on the tube of the calyx. 54 SCLERANTHE.S:. 

 Stipules none : but scarious bracts crowded 



around the flowers. . -:* , I. t 367 (75) AMARANTACE^;. 

 Stipules and scarious bracts none. 361 (74) CHENOPODIACEJS. 



Shrubs or trees. 



Ovules a pair in each cell of the ovary. 



Fruit a 3-celled pod : leaves evergreen. Buxus, (76) EUPHORBIACE^:. 

 Fruit 2-celled, a double samara. . . , . %,.'* 82 ACERINEJS. 

 Fruit a 1-celled 1 -seeded samara or drupe. . 356 (73) OLEACEJE. 

 Ovules single in each cell of the 



Three -9-celled ovary : leaves small and heath-like. 393 EMPETRACEA 

 Three-celled ovary : leaves broad. . . . 78 RHAMNACEJB. 



