8 APETALAE 



67. Ovary 2 — 3-celled. Ovules with a double coat. . 122. Euphorbiaceae. 

 Ovary 4-celled. Ovules with a single coat. Styles 2. Stamen i. Male 



flowers without a perianth. Fruit a drupe. Herbs. Leaves opposite. 



Callitriche, 123. Callitrichaceae. 



68. Ovary 2-celled with 2 ovules in each cell. Style i, with 2 stigmas. Sta- 



mens 2. Fruit a nut. Leaves pinnate, exstipulate. 



Fraximis, 197. Oleaceae. 



Ovary 3 — 4-celled with numerous ovules in each cell. Styles 3 — 4. Stamens 



3 — 8. Fruit a capsule or a schizocarp. Leaves undivided, stipulate. 



Myrothamnus, 99. Myrothamnaceae. 



^9- (54-) Ovary superior or nearly so 70 



Ovary inferior to half-inferior 153 



70. Ovary i, entire or lobed 71 



Ovaries 2 or more, distinct or united at the base only 146 



71. Ovary i-celled, sometimes incompletely chambered 72 



Ovary completely or almost completely 2- or more-celled 118 



72. Ovule I 73 



Ovules 2 or more 103 



y^)- Ovule erect or ascending or attached by a basal funicle 74 



Ovule pendulous or descending 94 



74. Ovule straight 75 



Ovule incurved or inverted 80 



75. Style I or none ; stigma solitary or stigmas 2 or more, contiguous at the 



base. Stamens i — 12 76 



Styles 2 — 4, free or united at the base ; stigmas not contiguous at the base. 

 Stamens 4 — 50 79 



76. Flowers hermaphrodite or polygamous. Stigma sessile, 2-lobed. Seed 



with fleshy albumen. Shrubs or trees. Leaves without stipules. 



Exocarpus, 56. Santalaceae. 



Flowers unisexual, rarely polygamous, but then herbs and stigma peni- 



cillate 77 



77. Leaves exstipulate. Stamens 2 — 12. Stigmas 2. Seed without albumen. 



Myrica, 48. Myricaceae. 



Leaves stipulate, rarely exstipulate, but then stigma i. Stamens i — 5. 78 



jS. Stamens straight in bud. Juice milky. Trees. . . 53. Moraceae. 



Stamens incurved in bud. Juice not milky. ... 54. Urticaceae. 



79. Leaves simple, entire toothed lobed or cleft, with a stem-clasping sheath 



at the base. Seed with copious mealy albumen. 66. Polygonaceae. 

 Leaves compound, exstipulate. Stamens 5. Seed without albumen. 



Pistacia, 127. Anacardiaceae. 



80. (74.) Ovule incurved. Embryo distinctly curved ; albumen usually 



mealy 81 



Ovule inverted. Embryo straight or nearly so ; albumen usually fleshy 

 or wanting 87 



