討論:葡萄屬

山羊百科，林文智老師的植物、山岳、攝影紀錄

6. VITIS L. 葡萄屬

Deciduous, rarely evergreen vines, climbing by tendrils, pith brown, interrupted at nodes by diaphragms; tendrils opposite the leaves. Leaves simple, dentate, usually lobed, rarely palmately compound, long-petiolate. Flowers polygamo-dioecious, 5-merous, in leaf-opposed panicles; calyx cupular, subinterger, sepals minute or obsolete; petals cohering at apex and falling as a whole at anthesis; disc hypogynous, consisting of 5 nectariferous glands adnate to the base of ovary; stamens 5, inserted on the disc; ovary 2-celled, with 2 collateral erect ovules in each cell. Fruit a 2-4 seeded berry; seeds usually pyriform, with a contracted beak-like apex and with 2 grooves on the ventral side.

KEY TO SPECIES

1. Mature leaves glabrous or glabrate beneath… 1. V. flexuosa

1. Mature leaves densely, cobwebby-tomentose beneath.

2. Leaf-blades triangular-ovate in shape… 2. V. kelungensis

2. Leaf-blades orbicular-cordate to cordate-ovate… 3. V. thunbergii

3. Leaves smaller, not more than 4 cm long… 3b. V. thunbergii var. taiwaniana

3. Leaves larger, more than 4.5 cm long… 3a. V. thunbergii var. thunbergii