XXX INTRODUCTION. 



Ovary solitary, I-celled. 

 Placenta central. Sepals 2, deciduous. Anthers introrse. 

 Sepals 5, persistent. Anthers extrorse. 

 Placentas parietal. 

 Calyx persistent. Capsule 3-valved : placentae 3. 

 Calyx deciduous. Juice colored. Leaves simple, lobed. 

 Juice watery. Placenta 1. Leaves 2 - 3-ternate. 

 Juice watery. Placentaj 2. Leaves simple or trifol 

 Ovary solitary, 2 -many-celled. 

 Stamens connected with the base of the petals. 

 Stamens united in a column. Sepals valvate. 

 Stamens united in a ring. Sepals imbricated. 

 Stamens free from the petals. 

 Stamens united into a tube. Sepals persistent. 

 Stamens united in clusters. Sepals deciduous. 

 Stamens separate. Ovary 5-celled. Leaves tubular. 

 Ovary many-celled. Leaves flat. 



■»- -t- Stamens twice as many as tlu petals. 

 Ovaries more than one. 

 Flowers dioecious. Fruit a drupe. Trees, with pinnate leaves. QIMARUBACEiE, 67 



Flowers perfect. Fruit dry, indehiscent, 1 - S-seeded Aquatic herbs. CAB0MBACEJE3, 18 

 Fruit a many-seeded follicle. Fleshy herbs. CRASSULACE^ 149 



Ovary solitary, 1-celled. 

 Leaves alternate. Fruit a legume. Leaves stipulate. LEGUMINOS^, 86 



Leaves opposite. 

 Fruit a capsule, with parietal placentiE. Leaves entire, dotted HYPERICAOB.^, 33 



Fruit a capsule, with a free central placenta. Leaves dotless. CARYOPHYLLAClil^, 45 

 Fruit a drupe. Shrubs, with trifoliolate dotted leaves. BUltSERACE.^, 67 



Fruit a berry. Herbs, with two peltate lobed leaves. BEIiBERlDACE^, 16 



Ovary solitary, 2-celled 



Flowers irregular : stamens monadelphous. Capsule 2-seeded. POLYGALACE.^, 82 

 Flowers regular ; stamens separate. Capsule long, many-seeded. TILIACEiE, 69 



Ovary solitary, 3-celled. Shrubs, with alternate leaves. 



Flowers monoecious. Fruit S-seeded, 3-valved. Stamens united. EUPHORBIACE^, 399 



Flowers perfect. Fruit 3-seeded, 3-winged, indehiscent. CYRILLACB^^E, 272 



Fruit many-eeeded, 3-valved. ELilCACE.^, 257 



Ovary solitary, 4-celled. Stamens 8. 



Style single. Low fleshy root-parasites, with scale-like leaves. MONOTROPE.^, 258 



A shrub, with alternate leaves and bractless flowers. CYRILLACE.E, 272 



Styles 4. Flowers cymose. Cap.-ule 4-lobed, spreading. CRASSULACE^, 149 



Ovary solitary, 5-c«lled. Stamens 10. 



Style single. Stamens monadeljihous. Leaves alternate, pinnate. CEDRELACE,^. 62 



Stamens separate. Leaves o[)posite, pinnate. ZYGOPHYLLACB^, 63 



Stamens separate. Leaves alternate, simple. PYROLE^, 258 



Styles 5 Cells of the fruit separating into l-seeded nutlets. GERANIACE^, 64 



Cells of the fruit united. Leaves trifoliolate. OXALIDACE.^, 63 



Ovary solitary, 7-celled. Anthers opening by terminal pores. ERICACEiE, 257 



Ovary solitary, 10 - 12-celled. Leaves opposite, abruptly pinnate. ZYGOPHYLLACE^, 63 



4_ 4_ ^_ Stamens exceeding the petals in number^ hut not twice as many. 



Ovary l-celled. Petals 4 : stamens 6. 



Sepals 2. Flowers irregular. Embryo minute in fleshy albumen. . FUMARIACE^, 22 



Sepals 4. Flowers regular. Embryo large. Albumen none. CAPPARIDACE.^;, 31 



Ovary 2-celled. 



Petals 3. Stamens 8, monadelphouB. Anthers 1-celled. POLYGALACE-E, 82 



Petals 4. Stamens 6. Fruit a silique or siliole. CRUCIFER.^, 23 



