Alternatively Ampelidaceae, Vitaceae
Including Pterisanth(ac)eae J.G. Agardh, Sarmentaceae Vent.
Habit and leaf form. Lianas (usually), or shrubs, or herbs (rarely). Plants succulent (erect `treelets'), or non-succulent. Climbing (usually), or self supporting; the climbers tendril climbers, or tendril climbers and sucker climbers (usually with tendrils representing modified shoots or inflorescences, the tendrils often bearing suckers). Stem growth conspicuously sympodial (sometimes), or not conspicuously sympodial. Mesophytic, or xerophytic. Heterophyllous, or not heterophyllous. Leaves evergreen, or deciduous; alternate, or opposite (the lower, sometimes); distichous (usually), or spiral; petiolate; non-sheathing; gland-dotted; simple (usually), or compound; when compound ternate, or pinnate, or palmate. Lamina when simple dissected (usually), or entire; commonly palmately lobed; palmately veined (commonly), or pinnately veined; cross-venulate. Leaves stipulate. Stipules intrapetiolar; caducous (often), or persistent. Leaves without a persistent basal meristem. Domatia recorded (4 genera); represented by pits, or pockets, or hair tufts.
Leaf anatomy. Leaves with `pearl glands' (commonly, these deciduous), or without `pearl glands'. Stomata present; anomocytic.
Lamina dorsiventral, or centric. The mesophyll containing mucilage cells (with or without raphides); containing calcium oxalate crystals. The mesophyll crystals raphides, druses, and solitary-prismatic. Minor leaf veins without phloem transfer cells (Cissus, Vitis).
Stem anatomy. Cork cambium present; initially deep-seated, or superficial. Nodes tri-lacunar, or penta-lacunar, or multilacunar (7). Internal phloem absent. Secondary thickening developing from a conventional cambial ring, or anomalous; occasionally via concentric cambia (Tetrastigma). The secondary phloem stratified into hard (fibrous) and soft (parenchymatous) zones, or not stratified. `Included' phloem present, or absent. Xylem with libriform fibres; with vessels. Vessel end-walls simple. Primary medullary rays wide. Wood partially storied (VP, VPI). Sieve-tube plastids P-type; type I (b).
Reproductive type, pollination. Hermaphrodite, or monoecious, or dioecious, or polygamomonoecious.
Inflorescence, floral, fruit and seed morphology. Flowers aggregated in `inflorescences'; in cymes and in panicles. The terminal inflorescence unit cymose. Inflorescences leaf-opposed (usually), or terminal, or axillary (rarely); cymes or panicles, often complex. Flowers bracteolate; small; regular; (3-)4-5(-7) merous; cyclic; tetracyclic. Free hypanthium present (short), or absent. Hypogynous disk present; intrastaminal; of separate members, or annular.
Perianth with distinct calyx and corolla; (6-)8-10(-14); 2 whorled; isomerous. Calyx (3-)4-5(-7); 1 whorled; polysepalous (represented by lobes), or gamosepalous (reduced to a collar); slightly lobulate, or entire, or toothed; regular; persistent; open in bud. Corolla (3-)4-5(-7); 1 whorled; gamopetalous; calyptrate (e.g. Vitis), or not calyptrate; valvate; regular.
Androecium (3-)4-5(-7). Androecial members free of the perianth (inserted at the base of the disk); all equal; free of one another; 1 - whorled. Androecium exclusively of fertile stamens. Stamens (3-)4-5(-7); isomerous with the perianth; alternisepalous. Anthers dehiscing via longitudinal slits; introrse; tetrasporangiate (usually), or bisporangiate (sometimes). Endothecium developing fibrous thickenings. The initial microspore tetrads tetrahedral, or isobilateral, or decussate. Anther wall initially with more than one middle layer (2); of the `dicot' type. Tapetum glandular. Pollen grains aperturate; 3 - aperturate; colporate; 2-celled.
Gynoecium 2 (nearly always), or 3-6. Carpels reduced in number relative to the perianth (usually), or isomerous with the perianth. Gynoecium syncarpous; eu-syncarpous; superior. Ovary 2(-6) locular. Gynoecium stylate. Styles 1; apical. Stigmas 1; dry type; non-papillate; Group II type. Placentation axile. Ovules 2 per locule; ascending; collateral; non-arillate; anatropous; bitegmic; crassinucellate. Outer integument not contributing to the micropyle. Embryo-sac development Polygonum-type. Polar nuclei fusing prior to fertilization. Antipodal cells formed; 3; not proliferating; ephemeral. Synergids hooked. Endosperm formation nuclear. Embryogeny asterad.
Fruit fleshy; indehiscent; a berry; 4 seeded. Seeds endospermic. Endosperm ruminate (at least in Vitis); oily. Cotyledons 2. Embryo achlorophyllous (Vitis vinifera); straight.
Seedling. Germination phanerocotylar.
Physiology, biochemistry. Not cyanogenic. Alkaloids present (rarely), or absent. Iridoids absent. Proanthocyanidins present, or absent; when present, cyanidin and delphinidin. Flavonols present; quercetin. Ellagic acid present (Vitis vinifera), or absent (Parthenocissus, Rhoicissus). Arbutin absent. Saponins/sapogenins absent. Aluminium accumulation not found. C3 and CAM. C3 recorded in Parthenocissus, Vitis. CAM recorded in Cissus, Cyphostemma.
Geography, cytology. Temperate to tropical. Cosmopolitan tropical to temperate. X = 11-20.
Taxonomy. Subclass Dicotyledonae; Crassinucelli. Dahlgren's Superorder Santaliflorae; Vitidales. Cronquist's Subclass Rosidae; Rhamnales. Takhtajan's Subclass Rosidae; Celastranae; Rhamnales. Species 700. Genera 15; Acareosperma, Ampelocissus, Ampelopsis, Cayratia, Cissus, Clematicissus, Cyphostemma, Nothocissus, Parthenocissus, Pterisanthes, Pterocissus, Rhoicissus, Tetrastigma, Vitis, Yua.
Economic uses, etc. Important for the wine grape (Vitis vinifera) and other species supplying edible fruit for wine and raisins. Ornamental vines from Cissus, Parthenocissus.
Illustrations. vitid439.gif vitid349.gif
Additional, to be intercalated. Flowers calyptrate (e.g. Vitis), or not calyptrate.
