| 1 |
Fruit conspicuously winged
|
(2)
|
| 1 + |
Fruit sometimes ridged but not conspicuously winged
|
(9)
|
| 2 (1) |
Shrubs; sepals and petals 4
|
(3)
|
| 2 (1) + |
Herbs; sepals and petals 5
|
(4)
|
| 3 (2) |
Capsule nearly spherical, 1.8-4 cm.
(2)
|
Z. xanthoxylon
|
| 3 (2) + |
Capsule narrowly ovoid to obovoid, 1-1.6 cm.
(3)
|
Z. kaschgaricum
|
| 4 (2) |
Leaflets 1 pair; capsule spherical, ca. 1 cm.
(14)
|
Z. fabagoides
|
| 4 (2) + |
Leaflets 1-5 pairs; capsule not spherical, or if spherical larger than 1 cm
|
(5)
|
| 5 (4) |
Capsule spherical, width of wings more than 5 mm
|
(6)
|
| 5 (4) + |
Capsule not spherical, width of wings less than 3 mm
|
(7)
|
| 6 (5) |
Leaves with 2 or 4 leaflets; leaflet blades 1-2.5 × 0.5-2 cm.
(15)
|
Z. potaninii
|
| 6 (5) + |
Leaves with 6-10 leaflets; leaflet blades 0.5-1.2 × 0.2-0.8 cm.
(16)
|
Z. macropterum
|
| 7 (5) |
Stamens ca. 2 × as long as petals; leaflet blades ovate to rotund.
(17)
|
Z. iliense
|
| 7 (5) + |
Stamens shorter than petals; leaflet blades linear, linear-oblong, or lanceolate
|
(8)
|
| 8 (7) |
Capsule lanceolate, base cuneate, apex acuminate.
(18)
|
Z. oxycarpum
|
| 8 (7) + |
Capsule oblong-ovoid to ovoid, both ends obtuse.
(19)
|
Z. pterocarpum
|
| 9 (1) |
Fruit not more than 2 × as long as wide, indehiscent.
(1)
|
Z. gobicum
|
| 9 (1) + |
Fruit more than 2 × as long as wide, dehiscent
|
(10)
|
| 10 (9) |
Leaves with more than 2 leaflets at least for majority of leaves
|
(11)
|
| 10 (9) + |
Leaves with only 2 leaflets
|
(13)
|
| 11 (10) |
Plants prostrate to ascending; leaflet blades 1-3 mm wide.
(13)
|
Z. mucronatum
|
| 11 (10) + |
Plants erect or spreading; leaflet blades 3-15 mm wide
|
(12)
|
| 12 (11) |
Perennial herbs; leaflet blades 3-5 mm wide; sepals 7-8 mm; capsule 2.5-4 cm, falcately curved.
(11)
|
Z. jaxarticum
|
| 12 (11) + |
Annual or biennial herbs; leaflet blades 4-15 mm wide; sepals 5-6 mm; capsule 1.6-2.5 cm, straight or slightly curved but not falcate.
(12)
|
Z. loczyi
|
| 13 (10) |
Stamens shorter than petals
|
(14)
|
| 13 (10) + |
Stamens longer than petals
|
(15)
|
| 14 (13) |
Plants 7-15 cm tall; petiole scabrous; pedicel 1-3 mm.
(4)
|
Z. kansuense
|
| 14 (13) + |
Plants 30-80 cm tall; petiole not scabrous; pedicel 10-18 mm.
(5)
|
Z. obliquum
|
| 15 (13) |
Plants 10-20 cm tall; capsule apex acuminate.
(10)
|
Z. rosowii
|
| 15 (13) + |
Plants 20-60(-100) cm tall; capsule apex not acuminate
|
(16)
|
| 16 (15) |
Capsule more than 6 mm in diam.; leaflet blades 1.5-3 cm wide
|
(17)
|
| 16 (15) + |
Capsule less than 5 mm in diam.; leaflet blades 0.7-1 cm wide
|
(18)
|
| 17 (16) |
Capsule cylindric, both ends not slender, 0.7-1 cm in diam.; seed surface smooth, margin entire; plants 40-80 cm tall.
(6)
|
Z. macropodum
|
| 17 (16) + |
Capsule oblanceolate to oblong, 1-1.5 cm in diam.; seed surface with pores, margin irregular; plants 20-25 cm tall.
(7)
|
Z. sinkiangense
|
| 18 (16) |
Leaflet blades oblong to oblanceolate; plants erect.
(8)
|
Z. brachypterum
|
| 18 (16) + |
Leaflet blades obovate to oblong-obovate; plants spreading or prostrate.
(9)
|
Z. fabago
|
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