Xlvi ANALYTICAL KEY. 



Petals longer than the sepals and alternate with them. 



Petals valvate. Ovary 2- to 6-celled Vitex, p. 53. 



Petals imbricate. Ovary 1-celled Myrsinace*:, p. 202. 



Petals longer than the sepals and opposite to them . Sabia, p. 70. 

 Stamens alternate with the petals. 

 Stamens distinctly hypogynous. 



Petals erect, clawed. Ovary incompletely 2-celled. 



Shrub PiTTOsroitUM, p. 19. 



Petals spreading. Ovary 1-celled, with parietal pla- 

 centas. Herb Drosera, p. 129. 



Stamens slightly perigynous or adhering to the petals. 



Stamens inserted on a broad fleshy disk .... Celastrace^;, p. 61. 

 Stamens adhering to the base of the petals. 



Ovary 5-celled, with 2 ovules in each cell . . . Pentaphylax, p. 28. 

 Ovary 4-celled, with 1 ovule in each cell . . . Ilex, p. 64. 

 Stamens free, not corresponding in number with the petals. 



Stamens 6. Petals 4. Herbs ...» Crucifer^), p. 15. 



Stamens 3. Petals 5. Woody climber Hippocratea, p. 61. 



Stamens 2. Petals 4. Tree Fraxintjs, p. 214. 



Leaves alternate, compound. 

 Herbs. 



Sepals 4. Petals 4. Stamens 8 (rarely more). 



Pod linear, 2-valved Polanisia, p. 17. 



Pod inflated, 3-corncred, 3-valved Cardiospermum, p. 46. 



Sepals 5. Petals 5. Stamens 10 Oxalis, p. 56. 



Trees, shrubs, or tall climbers. 

 Stamens as many as petals. 



Stamens opposite the petals. Climbers . . . . „ Vitis, p. 53. 

 Stamens alternate with the petals. Trees or shrubs. 



Ovary 1-celled, with 1 ovule Rhus, p. 69. 



Ovary-cells or carpels 4 or 5. 



Leaves dotted Rutaceje, p. 57. 



Leaves not dotted SiMARUBACEiE, p. 60. 



Stamens double the number of petals. 



Stamens inserted within an annular disk. Leaves 



not dotted ISephelitjm:, p. 46. 



Disk within the stamens or none. 



Leaves dotted. Ovules 1 or 2 in each cell of the 



ovary AuRANTiACEiE, p. 49. 



Leaves not dotted. Ovules several in each cell 



of the ovary Averrhoa, p. 56. 



D. Regular syncarpous Polypetals, with indefinite perigynous or superior stamens. 



Leaves alternate. 



Flowers hermaphrodite. Calyx-lobes and petals 5 or 

 rarely 4. 



Stamens attached to the base of the petals Symplocos, p. 211. 



Stamens free from the petals, inserted with them on the 



calyx Rosaceje, p. 103. 



Flowers unisexual. Sepals 2 or 3. Petals 2 to 5. Fruit 



3-winged Begonia, p. 126. 



Leaves opposite. 

 Ovary inferior. 



Calyx-segments linear, valvate. Petals cut Kandelia, p. 110. 



Calyx-lobes imbricate or very small. Petals entire . . Myrtace^;, p. 117. 

 Ovary free, but enclosed in the calyx-tube Lagerstrcemia, p. 112. 



