A flora of Manila - Rainforestation

KEY TO THE FAMILIES 37
11. Fruit entirely surrounded by the usually elon-
jjated calyx-tube.
45. Nyctaginaceae (p. 195)
11. Fruit not surrounded by the calyx-tube, the sepals
united only at the base.
12. Flowers without bracts, the perianth not
scarious 43. Chenopodiaceae (p 188)
12. Flowers with scarious bracts and perianth.
44. Aviaranthaceae (p. 189)
5. Ovary of 4 to 8 nearly or quite free, few- to many-ovuled carpels;
stamens united into a column 86. Sterculiaceae (p. 326)
5. Ovary of several united carpels.
6. Flowers unisexual 75. Euphorbiaceae (p. 279)
6. Flowers perfect.
7. Shrubs or small trees 92. Flacoiirtiaceae (p. 334)
7. Herbs.
2. Ovary inferior.
8. Flowers 5-merous; leaves opposite or whorled; stems
terete 46. Aizoaceae (p. 197)
8. Flowers 4-merous; leaves alternate; stems 4-angled.
97. Lythraceae (p. 340)
(Ammannia sp.)
3. Anthers opening- by hinged valves; vines with 3-foliolate leaves and
winged fruits 56. Hernandiaceae (p. 212)
3. Anthers not opening by hinged valves; leaves simple.
4. Vines with medium to large, very irregular flowers.
{Illigera)
41. Aristolochiaceae (p. 186)
4. Trees with small regular flowers 102. Combretaceae (p. 348)
(Terminalia)
Choripetalae
(Pohjpetalae)
(Calyx and corolla both present, the corolla of distinct and separate
petals.)
1. Ovary superior, free from the calyx.
2. Ovary simple, of a single carpel.
3. Submerged aquatic plants with finely divided leaves.
3. Not submerged aquatic plants.
50. Ceratophyllaceae (p. 202)
4. Anthers opening by hinged valves 55. Lauraceae (p. 209)
4. Anthers not opening by hinged valves.
5. Twining, herbaceous, somewhat fleshy vines, with small, perfect
flowers; sepals 2; fruit a dry or fleshy indehiscent utricle.
48. Basellaceae (p. 200)
5. Vines with small, unisexual (lowers; fruit a small drupe.
52. Menispermaceae (p. 2(33)
5. Plants of various habits, with perfect flowers, or if with
unisexual flowers, then shrubs or trees; sepals always more
than two.
6. Herbs, vines, shrubs, or trees with regular or irregular
flowers, the fruit a dehiscent on indehiscent pod (legume).
65. Leguminosae (p. 221)