XXXVI INTRODUCTION. 



Anthers separate. Leaves alternate. 

 Herbs. 



Corolla lobes valvate in the bud. Capsule opening at the sides. CAMPANULACE^, 278 



Corolla lobes imbricated in the bud. Capsule valvate. PRIMULACE.E, 297 



Shrubs. Flowers irregular. Stigma within a ciliate cup. GOODENIACEjE, 277 



Flowers regular. Authors opening by a terminal chink. VACCINIE^E, 279 



Flowers regular. Authers opening lengthwise STYRACACE.E, 291 



Flowers regular. Stamens 4-5, opposite the corolla lobes. OLACACEJS, 62 



DIVISION III. APETALOUS EXOGENOUS PLANTS. 



Floral envelopes single, consisting of a calyx only, or altogether wanting. 



* Amentaceous trees or shrubs. Flowers monoecious or dioecious. 



i- Only the sterile flowers in aments. 



Leafless. Branches grooved and sheathed. CASUARINACE^E, 454 



Leaves simple, stipulate. Involucre scaly. Seed entire. CUPULIFER.5S, 443 



Leaves pinnate, exstipulate. Involucre none. Seed 4-lobed. JUGLANDACE^E, 441 



4- H- Both the sterile and fertile flowers in aments. 



Aments globose. Calyx none. 



Fruit 2-beaked, 2-valved, many-seeded. Sterile aments spiked. HAMAMELACE^E, 151 



Fruit nut-like. 1-seeded, hairy. Amento single. PLATANACE^I, 441 

 Aments oblong or linear. 



Ovary 1-celled. Drupe 1-seeded. 



Leaves persistent. Drupe waxy granular. MYRICACE^I, 449 



Leaves deciduous. Drupe smooth. LEITNERIACE^E, 450 



Capsule 2-valved, many-seeded. Seed comose. SALICACE.E, 452 



Ovary 2-celled. Fruit dry, angled or winged. BETULACE.E, 451 



Fruit enclosed in the confluent berry-like calyx. HORACES, 437 



* * Flowers not in aments. 



(- Calyx and corolla none 



Ovaries 3-4, united below. Leaves cordate. Stamens 4 -8.) T>TT>WT> n-n i? ^10 



PIx^iLrvAVy .EjZEv, 410 



Ovary single. Leaves obovate. Stamens 2. 



Involucre none. Capsule 4-celled. Aquatic. CALLITRICHACE^E, 420 



Involucre spathe-like. Styles 2. Leaves alternate, parted. PODOSTEMACE.E, 420 



Involucre 8 -12 parted. Style one. Leaves whorled, forked. CERATOPHYLLACE.E, 419 

 Involucre 4-5 toothed, cup-like, containing one fertile flower and 



several sterile ones, each reduced to a single stamen. EUPHORBIACE^I, 421 



i- *- Calyx herbaceous or corolla-like. 

 Ovaries more than one. 



Stamens inserted on the calyx. Leaves stipulate. ROSACES, 129 



Stamens hypogynous. Stipules none. 



Embryo minute. RANUNCULACE^E, 2 



Embryo and seeds large, curved. MENISPERMACE^l, 14 



Ovary solitary. 

 Calyx adherent to the ovary. 

 Ovary 1-celled. 



Fruit a 2-valved, many-seeded capsule. SAXIFRAGACE.E, 142 



Fruit indehiscent, 1-seeded. 



Anthers (and stigma) sessile. Tree parasites. LORANTHACE-E, 418 



Anthers on filaments. 



Drupe berry-like. Stigma decurrent. CORNACE^E, 184 



Drupe dry. Albumen copious. Root parasites. SANTALACE.E, 416 



Prupe dry. Albumen none. Trees. COMBRETACE^, 152 



