CHORIPETALAE 43 



481. (188.) Ovary i-celled, sometimes incompletely chambered. . . . 482 

 Ovary completely or almost completely 2- or more-celled, rarely 2 or more 



distinct ovaries 507 



482. Ovules not distinctly differentiated from the placenta. Shrubs parasitic 



upon trees or shrubs. Leaves undivided. Calyx-limb little developed. 

 Petals 2 — 6, valvate in bud. Stamens as many as and opposite the petals. 



Stigma I. Loranthns, 61. Loranthaceae. 



Ovules distinctly developed. Herbs or non-parasitic shrubs or trees. 483 



483. Ovule 1 484 



Ovules 2 or more 490 



484. Ovule erect, straight. Stigmas 2. Stamens numerous. Petals 3 — ^4. 



Flowers monoecious, in spikes. Leaves pinnate. Trees. 



Juglans, 49. Juglandaceae.. 

 Ovule pendulous, inverted. Stamens as many as the petals or fewer, 

 rarely {Alangiaceae) more, but then petals 6 — 10 and flowers herma- 

 phrodite 485 



485. Filaments wholly united. Anthers 5, twisted. Flowers unisexual. 



Seeds exalbuminous. Leaves angled or lobed. Climbing, tendril- 

 bearing plants 223. Cucurbitaceae. 



Filaments free or united at the base only. Plants without tendrils. 486 



486. Anthers opening by valves. Stigma i. Seed exalbuminous. Trees or 



climbing shrubs. Leaves palminerved. Flowers in panicles. 



85. Hernandiaceae.. 

 Anthers opening by longitudinal slits. Flowers hermaphrodite or poly- 

 gamous. Seed albuminous 487 



487. Flowers 4-merous, in racemes or panicles. Leaves pinnate. Shrubs 



or trees. Fruit a drupe Polyscias, 185. Araliaceae. 



Flowers 5 — lo-merous. Leaves simple, but sometimes dissected, and then 

 herbs or undershrubs with the flowers in umbels 488 



488. Flowers in umbels. Leaves more or less deeply divided. Herbs or 



undershrubs. Fruit a nut 186. Umbelliferae. 



Flowers in heads, spikes, or cymes. Leaves undivided. Shrubs or 

 trees 489- 



489. Flowers in cymes. Petals valvate in bud. Fruit a drupe. Embryo large. 



Alangium, 178. Alanglaceae. 



Flowers in heads or spikes, 5-merous. Petals imbricate in bud. Fruit a 



nut. Embryo small 100. Bruniaceae. 



490. (483.) Ovules basal or inserted on a free central placenta. . . . 491 

 Ovules parietal or inserted at the apex of the ovary-cell. . . . 499. 



491. Flowers unisexual. Stamens as many as the petals or fewer, 2 — 5. 



Fruit a berry or a nut. Herbs or undershrubs, rarely shrubs. . 492 

 Flowers hermaphrodite 493 



492. Flowers 4-merous. Styles or sessile stigmas 4, free. Seeds albuminous.. 



Herbs. Leaves undivided. Lauremhergia , 183. Halorrhagaceae.. 



