20 



Carpels more than one, combined into a solid pistil. 



bfainens liyi)0^3'iiou8. I'liiceutas parietal Bixineae (Flacourdeae) . 



Stamens bypogynuus. J?laceutas in the axis. 



Oalj'x valvate. 



Stnmens monadelphons StercuUacene. 



Stamens distinct, , Tiliaceae. 



Calyx imbricate. 



Fruit beaked Oeraniaceae. 



Fruit not beaked, Malpii/hiaceae. 



Stnmens perigynous. Placentas parietal, Pasaijloraceae. 



Stamens perigynous. Placentas in the axis. 



Leaves opposite. Stamens more than sepals, Saxifrageae (Gunonieae). 



Leaves alternate. Stamens alternate with sepals, Rhamnaceae. 



Leaves alternate. Calyx membranous and ragged, Celtidcae {Ulmeae). 

 Carpels solitary, or quite separate. 



Styles from the base of the carpels, Chryaohalaneae. 



Styles terminal, one to each ovary. Fruit a pod, ........... .Leguminoaae, 



Styles terminal, 3 to each ovary. 



Stipules oohreate, Polygonaceae. 



Stipules simjile, Phytolaccaceae. 



Flowers unisexual. 



Carpels more than 1, combined into a solid pistil. 



Flowers amentaceous. Seeds arillate, .w... .Ewphorbiaccae {Scepeae). 



Flowers amentaceous. Seeds not arillate Betulaceae. 



Flowers not amentaceous, Etq)horbiaceae, 



Carpels solitary. 



Cells of anthers perpendicular to the filament, .,,.., Eiiphorhiaceae (Stilagineae). 

 ji,- Cells of anthers parallel with the filament 



^ Embryo straight. 



^ Seed albuminous. Stipules often small, Urticaceae. 



Seed exalbuminous. Stipules large Urticaceae {Artocarpeae), 



Embryo hooked. 



Seed exalbuminous, Urticaceae (JCannabineae). 



Seed albuminous, , Urticaceae {Moreae), 



Leaves destitute of stipules. 

 Flowers hermaphrodite. 



Sepals 2, Porfulacaceae. 



Sepals more than 2. 



Carpels more than 1, combined into a solid pistil. 



Placentas parietal, in lines, Papaveraceae, 



Placentas parietal, lining the pericarp, Bixineae {Flacourtieae), 



Placentas in the axis. 



Ovary with a very small number of ovules. 



Calyx short, herbaceous. Gynobasic, ...,, Butaceae. 



Calyx short, herbaceous. Not gynobasic. 



Embryo curved round mealy albumen Phytolaccaceae. 



Embryo straight Celastrineae, 



Ovary with numerous ovules. 



Two divaricating carpels, Saxifrageae. 



Carpels not divaricating. Stamens hypogynous. 



Leaves opposite, Caryophylleae. 



Leaves alternate, Podostemaceae. 



Carpels not divaricating. Stamens perigynous. 



Fruit 1-celled, Primulaceae. 



Fruit many-celled, Lythrarieae. 



Carpels solitary or quite separate. 



Carpels several. Stamens hypogynous Ranunculaceae. 



Carpel single. 



Anther- valves recurved. Leafy, Lanrineae 



Anther-valves recurved. Lealless parasites, Lanrineae (Cussytheaej. 

 Anther-valves slit. 



Fruit a pod, Legiiminosae. 



Fruit not a pod. 



Calyx long or tubular, with a hardened base, . . .Nyctagincae. 

 Calyx long and tubular, nowhere hardened. 



