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FOC | Family List | FOC Vol. 12 | Rhamnaceae

11. Ventilago Gaertner, Fruct. Sem. Pl. 1: 223. 1788.

翼核果属 yi he guo shu

Climbing shrubs or lianas, rarely small trees. Leaves alternate, leathery or nearly so, rarely papery, conspicuously reticulate, base asymmetric, margin entire or toothed. Flowers small, bisexual, 5-merous, few in fascicles or in shortly pedunculate cymes, or in terminal or axillary, cymose panicles. Sepals 5, triangular, adaxially medially keeled. Petals obovate-orbicular, apex emarginate, rarely absent. Disk thick, fleshy, pentagonous. Ovary globose, immersed in disk, 2-loculed, with 1 ovule per locule; styles 2-fid. Fruit a 1-seeded, indehiscent samara, 1/3-1/2 of base surrounded by persistent calyx tube, apex with longitudinally elongating oblong wing, with relict styles; endocarp globose, thin, woody, 1-loculed, 1-seeded. Seeds without endosperm; cotyledon thick.

About 40 species: Old World tropics; six species (two endemic) in China.

Ventilago zhengdei G. S. Fan (J. Nanjing Forest. Univ. 28(1): 107. 2004), described from Yunnan, could not be treated here because no material was seen by the authors.

1 Ovary and fruit densely pilose   (2)
+ Ovary glabrous or sparsely pubescent; fruit glabrous   (3)
2 (1) Leaf blade leathery, both surfaces glabrous or abaxially pubescent on major veins, apex acute, shortly acuminate, or acuminate.   5 V. calyculata
+ Leaf blade papery, adaxially glabrous, abaxially with barbate axils on major veins, apex long acuminate or caudate-acuminate.   6 V. oblongifolia
3 (1) Flowers few fascicled in leaf axils or in axillary shortly pedunculate cymes; lateral veins 4-6(or 7) pairs   (4)
+ Flowers in terminal cymose panicles or axillary cymose racemes; lateral veins 8-16 pairs   (5)
4 (3) Leaf blade ovate-oblong or ovate-elliptic, 4-8 × 1.5-3.2 cm, apex acuminate or caudate-acuminate, petiole 3-5 mm; winged fruit 3-6 cm.   1 V. leiocarpa
+ Leaf blade oblong, 1.2-3 × 1-1.5 cm, apex acute, petiole 1-2 mm; winged fruit 1.5-2 cm.   2 V. elegans
5 (3) Leaf blade leathery, oblong or elliptic, apex obtuse or rounded, margin entire or upper margin inconspicuously remotely dentate, lateral veins 8-16 pairs.   3 V. inaequilateralis
+ Leaf blade papery, ovate-oblong or ovate-elliptic, apex long acuminate, margin obtusely dentate, lateral veins 4-8(-10) pairs.   4 V. maderaspatana

Lower Taxa


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