APETALAE I5 



154. Ovule 1 155 



Ovules 2 or more 167 



155. Ovule erect, ascending, attached by an erect funicle, or adnate to the 



ovary-wall 156 



Ovule pendulous or descending 162 



156. Ovule adnate to the ovary-wall. Style simple ; stigma entire. Stamens 



as many as and opposite the perianth-segments. Perianth valvate 

 in bud. Leaves without stipules. Shrubs growing upon trees. 



61. Loranthaceae. 



Ovary free from the ovary-wall. Trees or shrubs growing on the ground, 



or herbaceous plants I57 



157. Ovule straight. Embryo straight. Flowers unisexual. Stamens as 



many as and opposite the perianth-segments or more. . . . 158 



Ovule incurved or inverted. Embryo curved, more rarely straight, but 



then stamens as many as and alternating with the perianth-segments. 159 



158. Stamens i — 5. Leaves simple or digitate, stipulate. 54. Urticaceae. 

 Stamens numerous. Stigmas 2. Trees. Leaves pinnate, exstipulate. 



Juglans, 49. Juglandaceae. 

 15g. Ovule inverted. Stamens as many as and alternating with the perianth- 

 segments. Seeds exalbuminous ; embryo straight. 226. Compositae. 

 Ovule incurved. Stamens as many as and opposite the perianth-segments 

 or more. Seeds albuminous ; embryo curved. Herbs. . . 160 



160. Flowers unisexual. Perianth-segments 2 — a, valvate in bud. Stamens 



10 — 30. Stigma I. Fruit drupaceous. 



Cynocramhe, 70. Cynocrambaceae. 

 Flowers hermaphrodite. Perianth-segments 5, imbricate in bud. Sta- 

 mens 5. Stigmas 2 — 5. Fruit opening by a lid or bursting irregu- 

 larly 161 



161. Style short, with long stigmas. Leaves alternate, exstipulate. Flowers 



in spike- or panicle-like inflorescences. . Beta, 67. Chenopodiaceae. 



Style long, with 2 short stigmas. Leaves opposite, linear, stipulate. 



Flowers in heads Sclerocephalus, 75. Caryophyllaceae. 



162. (155.) Ovule straight. Style simple. Stamen i. Flowers polygamous. 



Reddish-brown herbs, parasitic upon roots. Leaves reduced to scales. 



Cynomortum, 184. Cynomoriaceae. 

 Ovule incurved or inverted. Green plants. Leaves well developed. 163 



163. Flowers unisexual or polygamous. Stamens as many as and opposite the 



perianth-segments or fewer ^"4 



Flowers hermaphrodite. Stamens as many as and alternate with the 

 perianth-segments or more. Leaves exstipulate 166 



164. Anthers opening by longitudinal slits. Flowers unisexual. Leaves stipu- 



late 53. Moraceae. 



Anthers opening by valves. Leaves exstipulate 165 



165. Flowers unisexual. Leaves penninerved. Hypodaphnis, 84. Lauraceae. 

 Flowers polygamous. Leaves palminerved. 



Gvrocarpus, 85. Hernandiaceae. 



