familyVitaceae
genusParthenocissus
Difference between revisions of "Parthenocissus"
Monogr. Phan. 5: 447. 1887.
Etymology: Greek parthenos, virgin, and kissos, ivy equivalent of vigne vierge, French name for type species, P. quinquefolia
Synonyms: Psedera Necker ex Greene Landukia Planchon
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|name=Landukia | |name=Landukia | ||
|authority=Planchon | |authority=Planchon | ||
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|authority=Planchon in A. L. P. P. de Candolle and C. de Candolle | |authority=Planchon in A. L. P. P. de Candolle and C. de Candolle | ||
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|genus=Parthenocissus | |genus=Parthenocissus | ||
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Revision as of 20:00, 16 December 2019
Lianas, climbing by tendrils or scrambling without support and producing adventitious roots, synoecious. Branches: bark adherent; pith white, continuous through nodes; tendrils 3–12-branched, with or without adhesive discs. Leaves usually palmately compound, sometimes simple. Inflorescences usually bisexual, leaf-opposed or terminal, paniclelike or corymblike cymes, sometimes compound. Flowers bisexual; calyx cup-shaped, shallowly 5-lobed; petals 5, distinct; nectary adnate to base of ovary, annular, entire, or absent; stamens 5; style conic, short. Berries dark blue or black. Seeds 2–4 per fruit. x = 10.
Distribution
North America, Asia.
Discussion
Species 15 (4 in the flora).
Selected References
None.
Lower Taxa
Key
| 1 | Leaves usually simple, if palmately compound then leaflets 3. | Parthenocissus tricuspidata |
| 1 | Leaves palmately compound, leaflets (4–)5–7. | > 2 |
| 2 | Leaflets thick, fleshy, (5–)7, 3–5 cm; Edwards Plateau and Lampasas Cut Plain, Texas. | Parthenocissus heptaphylla |
| 2 | Leaflets thin, herbaceous, (4–)5(–7), 4–12 cm; throughout North America, including Edwards Plateau and Lampasas Cut Plain. | > 3 |
| 3 | Inflorescences dichotomously branched, without distinct central axes; berries 8–12 mm diam.; tendrils (2–)3–5-branched, usually without, rarely with, adhesive discs; leaflets lustrous adaxially. | Parthenocissus vitacea |
| 3 | Inflorescences divergently branched, with distinct central axes; berries 5–8 mm diam.; tendrils 4–12-branched, with adhesive discs; leaflets dull adaxially. | Parthenocissus quinquefolia |