KEY TO THE ORDERS 
Calyx persistent. 
Stigmas pinnatifid : insectivorous plants. ` 
Dionaeaceae in Order SARRACENIA LES. 
Stigmas not pinnatifid : plants not insectivorous (except in Sarraceniales). 
Styles or stigmas distinct or united, but not discoid. 
Leaves glandular or pellucid-punctate. : 
Placentae axile. Rutaceae in Order GERANIALES. 
Placentae parietal. Canellaceae in Order HYPERICALES. 
Leaves not glandular. i 
Placentae pariental: gynoecium with a 1-celled ovary. 
Anther-sacs opening length wise. 
Capparidaceae in Order PAPAVERALES. 
Anther-sacs opening at the top. 
Bixaceae in Order HYPERICALES. 
Placentae axile or central: gynoecium with a 2-several-celled ovary, 
(or with distinct carpels.) Theaceae in Order HYPERICALES. 
Styles or stigmas united into a disk. 
Herbs: bog or aquatic plants. 
Petalsand sepals numerous : leaves with flat blades: aquatic plants. 
Nymphaeaceae in Order RANALES. 
Petals and sepals few: leaves with pitcher-like organs: bog plants. 
Sarraceniaceae in Order SARRACENIALES, 
Shrubsortrees: plants notaquatic. Clusiaceaein Order HYPERICALES. 
Sepals valvate. 
Stamens with distinct filaments. 
Ovary I-celled: placentae parietal. Capparidaceae in Order PAPAVERALES. 
Ovary 2-several-celled : placentae axile or central. 
Families in Order MALVALES. 
Stamens with united filaments. Order MALVALES. 
£2 Stamens few, not over twice as many as the petals. 
Stamens as many as the petals and opposite them. 
Anther-sacs opening by hinged valves. Podophyliaceae in Order RANALES. 
Anther-sacs opening by slits. 
Flowers monoecious. Euphorbiaceae in Order EUPHORBIALES. 
Flowers perfect. 
Ovules, or seeds, several or many: embryo coiled. 
Portulacaceae in Order CHENOPODIALES. 
Ovules, or seeds, solitary : embryo straight. 
Plumbaginaceae in Order PRIMULALES. 
Stamens 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. 
Stamens, 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. 
Herbs. Families in Order CHENOPODIALES. 
Trees or shrubs. 
Stamens with free and distinct filaments. 
à B Tamaricaceae in Order HYPERICALES. 
Stamens with partially united filaments, and usually adnate to the 
corolla. Styracaceae in Order EBENALES. 
Ovules, or seeds, on parietal placentae. 
Stigmas 2-cleft. 
Anther with an inconspicuous connective. 
Stigmas not brush-like. Droseraceae in Order SARRACENIALES. 
Stigmas brush-like. Turneraceae in Order HYPERICALES. 
Anther with the conspicuous connective produced beyond the sacs. 
: Papayaceae in Order PASSIFLORALES. 
Stigmas entire. 
Stamens with united filaments and no staminodia. 
Families in Order MALVALES. 
Stamens with distinct filaments. : 
Staminodia present. Parnassiaceae in Order ROSALES. 
Staminodia wanting. Families in Order HYPERICALES. 
Ovary several-celled. 
Stamens adnate to the gynoecium. 
Asclepiadaceae in Order ASCLEPIADALES. 
Stamens not adnate to the gynoecium. 
Stamens with wholly or partly united filaments. 
Anthers opening lengthwise. Families in Order GERANIALES. 
Anthers opening by pores. Polygalaceae in Order PoLYGALALES. 
Stamens with distinct filaments. 
Anthers opening by pores. Families in Order ERICALEs. 
Anthers opening by slits. 
Stigmas or styles distinct and cleft, or foliaceous, or united by 
. pairs. Order EUPHORBIALES. 
php r styles all distinct or all united, neither cleft nor foli- 
us. 
Stamens 2. Oleaceae in Order OLEALES. 
Stamens more than 2. 
Leaves with compound blades. . 
E Families in Order GERANIALES. 
Leaves with simple blades. 
Ovule solitary in each carpel. 
Styles distinct: ovule pendulous. 
amilies in Order GERANIALES. 
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