|
| 1 |
Cymose racemes or terminal cymose panicles formed by cymes; drupe hairy, endocarp thin, early broken |
|
(2) |
| + |
Axillary cymes; drupe glabrous, endocarp thick, stiffly cartilaginous, difficult to break |
|
(4) |
| |
|
|
|
| 2 (1) |
Shrubs or small trees; leaf blade broadly ovate or broadly elliptic, broad at middle, adaxially densely ferruginous or yellow-brown tomentose. |
|
12 Z. rugosa |
| + |
Scandent shrubs; leaf blade ovate-elliptic or ovate-oblong, broad at lower part, adaxially veins pubescent or glabrous |
|
(3) |
| |
|
|
|
| 3 (2) |
Leaves adaxially on veins densely ferruginous hairy or sparsely pubescent; flowers without petals; drupe subglobose, not more than 1.5 cm, densely pubescent at first, ± glabrescent. |
|
10 Z. fungii |
| + |
Leaves adaxially only clustered hairy in vein axils; flowers with petals; drupe compressed-elliptic, ca. 2 cm, densely orange pilose. |
|
11 Z. attopensis |
| |
|
|
|
| 4 (1) |
Peduncles conspicuous, 2-16 mm |
|
(5) |
| + |
Peduncles very short, not longer than 2 mm, or flowers and fruit subsessile |
|
(6) |
| |
|
|
|
| 5 (4) |
Scandent or erect shrubs, with hooked-recurved spines or one erect spine and another recurved; leaf blade 3-5 × 2-4 cm; peduncles 2-5 mm; drupe 4-5 mm in diam., fruiting pedicels 2-3 mm. |
|
8 Z. laui |
| + |
Spinescent trees; leaf blade 5-14 × 3-6 cm; drupe ca. 10 mm in diam., fruiting pedicels 4-11 mm. |
|
9 Z. incurva |
| |
|
|
|
| 6 (4) |
Leaves adaxially hairy at least on veins; branches with short spines less than 6 mm; drupe not more than 1.2 cm |
|
(7) |
| + |
Leaves adaxially glabrous or subglabrous, or only at base of vein axils hairy, with 2 spines, long spine often more than 1 cm, rarely to 3 cm; drupe 1.2-3 cm in diam. (excluding Z. jujuba var. spinosa and Z. jujuba f. tortuosa) |
|
(9) |
| |
|
|
|
| 7 (6) |
Branchlets, petioles, pedicels, and calyx sparsely pubescent or rarely glabrous; leaves adaxially sparsely pubescent on veins; flowers solitary or 2-4 in axillary cymes. |
|
5 Z. pubinervis |
| + |
Branchlets, petioles, pedicels, and calyx densely pubescent; flowers numerous in dichotomous cymes |
|
(8) |
| |
|
|
|
| 8 (7) |
Scandent or erect shrubs; leaf blade ovate-oblong or ovate-lanceolate, broadest at lower part, apex acute or acuminate, adaxially ferruginous; drupe 5-6 mm in diam. |
|
6 Z. oenopolia |
| + |
Trees or shrubs; leaf blade oblong or elliptic, rarely suborbicular, broadest at middle, apex rounded, rarely acute, adaxially densely yellow or gray-white tomentose; drupe ca. 10 mm in diam. |
|
7 Z. mauritiana |
| |
|
|
|
| 9 (6) |
Annual branches usually 2-7-fascicled on oblong reduced branches; pedicels and calyx glabrous; drupe oblong or narrowly ovoid, mesocarp thick, fleshy. |
|
1 Z. jujuba |
| + |
Plant without reduced branches; pedicels and calyx hairy; drupe globose or obovoid-globose, mesocarp thin, not fleshy |
|
(10) |
| |
|
|
|
| 10 (9) |
Leaves solitary or 2 or 3 in fascicles, leaf blade 2-4 × 1.5-3 cm, apex obtuse or rounded; drupe 1.2-1.5 cm in diam. |
|
2 Z. xiangchengensis |
| + |
Leaves solitary, leaf blade 5-12.5 × 3-5.5 cm, apex acuminate to obtuse; drupe ca. 1.8 cm in diam |
|
(11) |
| |
|
|
|
| 11 (10) |
Young branches glabrous; leaf blade ovate-lanceolate, apex acuminate; drupe endocarp thicker than mesocarp, basal margin thickening. |
|
3 Z. mairei |
| + |
Young branches and annual branches tomentose; leaf blade elliptic or ovate-elliptic, apex obtuse or subrounded; drupe mesocarp thicker than endocarp, basal margin not thickening. |
|
4 Z. montana |
|
