KEY TO THE ORDERS. 



Calyxpersistent. P»rF 



Stigmas pinnatifid: insectivorous plants. 



Ci- ^ ■ ^n, , Dionaeaceae in Order Sarraceniales. 491 



btigmas not pinnatifid: plants not insectivorous (except in Sarraceniales) 

 btyies or stigmas distinct or united, but not discoid. 

 Leaves glandular or pellucid-punctate. 



Placentae axile. Rutaceae in Order Geraniales 658 



Placentae parietal. Canellaceae in Order Hypericales 781 



Leaves not glandular. 



Placentae parietal: gynoecium with a 1-celled ovary. 

 Anther-sacs opening lengthwise. 



, , . Capparidaceae in Order Papaverales. 459 



Anther-sacs opening at the top. 

 „, , ., , Bixaceae in Order Hypericales. 781 



Placentae axile or central: gj'noecium with a 2-several-celled 

 ovary, (or with distinct carpels.) 



c,, , ^. .^ , . ,. , Theaceae in Order Hypericales. 781 



btyles or stigmas united into a disk. 

 Herbs: bog or aquatic plants. 



Petals and sepals numerous: leaves with flat blades: aquatic 



plants Nymphaeaceae in Order Ranales. 428 



Petals and sepals few: leaves with pitcher-like organs: bog 

 ou L P'^°'s. Sarraceniaceae in Order Sarraceniales. 491 



bnrubs or trees: plants not aquatic. 



Sepals valvate. Clusiaceae in Order Hypericales. 781 



Stamens with distinct filaments. 



Ovary 1-celled: placentae parietal. 



^ „ , „ , , Capparidaceae in Order Papaverales. 460 



Ovary 2-several-celled: placentae axile or central. 



Q. .^, .^ , „, Families in Order Mal vales. 759 



Stamens with united filaments. Order Malvales. 759 



' fetamens tew, not over twice as many as the petals. 

 Stamens as many as the petals and opposite them. 



Anther-sacs opening by hinged valves. Podophyllaceae in Order Rvn^les 4''8 

 Anther-sacs opening by slits. 



Flowers monoecious. Euphorbiaceae in Order Euphorbiales 690 



h lowers perfect. 



Ovules, or .seeds, several or many: embryo coiled. 



^ , , ,. Portulacaceae in Order Chenopodiales. 383 



Ovules, or seeds, solitary: embryo straight. 



„. , , Plumbaginaceae in Order Primulales. 898 



btamens as many as the petals and alternate with them, or more, sometimes 

 twice as many. 

 Stamens 6: petals 4: .sepals 2 or 4. Families in Order Papaverales 460 



btamens, petals and sepals of the same number, or stamens more, usually 

 twice as many as the sepals or petals. 

 Ovary 1-celled. 



Ovules, or seeds, on basal or central placentae. 



H^rbs. Families in Order Chenopodiales. 383 



Irees or shrubs. 



Stamens with free and distinct filaments. 



„ . , Tamaricaceae in Order Hypericales. 781 



btamens with partially united filaments, and usuallv adnate to 



the corolla. Styracaceae in Order "Ebenales. 908 



Ovules, or seeds, on parietal placentae. 

 Stigmas 2-eleft. 



Anther with an inconspicuous connective. 

 Stigmas not brush-like. 



Droseraceae in Order Sarraceniales. 491 

 Stigmas brush-like. Turneraceae in Order Hypericales. 781 

 Anther with the conspicuous connective produced beyond the 

 -, . sacs. Papayaceae in Order Passiflorales. 805 



Stigmas entire. 



Stamens with united filaments and no staminodia. 



^ . , ,. . Families in Order Malvales. 759 



btamens vnth distinct filaments. 



Staminodia present. Parnassiaceae in Order Rosales. 494 



Staminodia wanting. Families in Order Hypericales. 781 



Ovary several-celled. 



Stamens adnate to the gynoecium. 



_ , Asclepiadaceae in Order Asclepiadales. 933 



btamens not adnate to the gynoecium. 



Stamens with wholly or partly united filaments. 



Anthers opening lengthwise. Families in Order Geraniales. 658 

 Anthers opening by pores. 

 _ . , , Polygalaceae in Order Polygalales. 682 



btamens with distinct filaments. 



Anthers opening by pores. Families in Order Ericales. 876 



Anthers opening by slits. 



Stigmas or styles distinct and cleft, or foliaceous, or united 



by pairs. Order Euphorbiales. 690 



Stigmas or styles all distinct or all united, neither cleft nor 

 foliaceous. 

 Stamens 2 Oleaceae in Order Oleales. 916 



