481. (188.) Ovary 1-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 1. _Loranthus_, =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 hermaphrodite. 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 1. Seed exalbuminous. Trees or climbing shrubs. Leaves palminerved. Flowers in panicles. =85. Hernandiaceae.= Anthers opening by longitudinal slits. Flowers hermaphrodite or polygamous. Seed albuminous. 487 487. Flowers 4-merous, in racemes or panicles. Leaves pinnate. Shrubs or trees. Fruit a drupe. _Polyscias_, =185. Araliaceae=. Flowers 5-10-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. Alangiaceae.= 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. _Laurembergia_, =183. Halorrhagaceae=. Flowers 5-merous. Style 1, entire or cleft. Seeds exalbuminous. =223. Cucurbitaceae.= 493. Sepals 2. Fruit opening by a lid. Herbs. Leaves alternate, undivided. _Portulaca_, =73. Portulacaceae=. Sepals 4-8, sometimes united into an entire calyx. Style simple. Fruit indehiscent. Trees or shrubs, rarely (_Bruniaceae_) undershrubs. 494 494. Stamens numerous. Petals 5. Ovules 2. Fruit a drupe. Leaves alternate, stipulate. =103. Rosaceae.= Stamens as many or twice as many as the petals, 4-16. Leaves undivided. 495