| 1 |
Capsule glabrous. |
|
(2) |
| + |
Capsule hairy. |
|
(16) |
| |
|
|
|
| 2 (1) |
Dwarf shrubs of alpine areas; leaves generally not exceeding 2.5 cm. |
|
(3) |
| + |
Small or large shrubs or trees. |
|
(4) |
| |
|
|
|
| 3 (2) |
Rachis of the female catkin hairy; catkin 10-45 mm long; leaf margin crenate or serrate. |
|
18 S. flabellaris |
| + |
Rachis of the female catkin glabrous; cakin 7.5-12.7 mm long; leaf margin entire. |
|
19 S. lindleyana |
| |
|
|
|
| 4 (2) |
Branches long drooping, tree with a ‘weeping’ habit. |
|
(5) |
| + |
Branches erect spreading, not drooping. |
|
(6) |
| |
|
|
|
| 5 (4) |
Leaves in the catkin producing region much smaller. Nectary one, longer than the stipe. |
|
13 S. babylonica |
| + |
Leaves in the catkin producing region ± of the same size. Nectaries 1-2 per flower, equalling the fruit stipe (0.2-0.8 mm). |
|
12 S. alba |
| |
|
|
|
| 6 (4) |
Bract, ovary and fruit reddish violet. |
|
11 S. karelinii |
| + |
Bract, ovary and fruit not as above. |
|
(7) |
| |
|
|
|
| 7 (6) |
Branches mostly covered with white bloom, stipe of the ovary c. 1 mm long. |
|
5 S. capusii |
| + |
Branches not covered by the white bloom. |
|
(8) |
| |
|
|
|
| 8 (7) |
Fruiting catkin c. 1 cm long. |
|
26 S. nuristanica |
| + |
Fruiting catkin >1 cm long. |
|
(9) |
| |
|
|
|
| 9 (8) |
Lamina ovate or elliptic-oblong, tip obtuse, sometimes acute; stigma subsessile. |
|
9a subsp. denticulata |
| + |
Lamina not as above. |
|
(10) |
| |
|
|
|
| 10 (9) |
Leaf elliptic or oblong-obovate, tip shortly acuminate, usually oblique. |
|
23 S. fedtschenkoi |
| + |
Leaf lanceolate to linear lanceolate or ovate lanceolate or elliptic or broadly elliptic, tip not oblique. |
|
(11) |
| |
|
|
|
| 11 (10) |
Fruiting catkin 5 cm or more in length. |
|
(12) |
| + |
Fruiting catkin mostly less than 5 cm in length. |
|
(14) |
| |
|
|
|
| 12 (11) |
Fruiting catkin 10-18 cm in length; stipules up to 1.3 cm long. |
|
16 S. dolichostachya |
| + |
Fruiting catkin 10 cm or less in length stipules < 1 cm long. |
|
(13) |
| |
|
|
|
| 13 (12) |
Fruiting catkin lax; fruit stipe 0.5-3 mm, capsule 3.5-5 mm long. |
|
2 S. tetrasperma |
| + |
Fruiting catkin not lax; fruit stipe 0.1-0.8 mm, capsule 4-6 mm long. |
|
6 S. pycnostachya |
| |
|
|
|
| 14 (11) |
Lamina broadly elliptic, shortly acuminate. |
|
14 S. excelsa |
| + |
Lamina not as above. |
|
(15) |
| |
|
|
|
| 15 (14) |
Fruit stipe 0.1-0.8 mm, capsule 4-6 mm. |
|
6 S. pycnostachya |
| + |
Fruit stipe 0.4-1.8 (-2.5) mm, capsule 3-5.5 mm. |
|
1 S. acmophylla |
| |
|
|
|
| 16 (1) |
Lamina about half as broad as long; margin sinuate-erose. Capsule 7-9 mm. |
|
22 S. aegyptiaca |
| + |
Lamina not as above. Capsule <= 7 mm. |
|
(17) |
| |
|
|
|
| 17 (16) |
Lamina elliptic to subrhomboidal, rarely ovate, narrowed at the base, tip shortly acuminate (capsule stipe 1-3 mm). |
|
15 S. iliensis |
| + |
Lamina not as above. |
|
(18) |
| |
|
|
|
| 18 (17) |
Lamina elliptic, oblong or ovate, 2.5-6.5 x 1.2-2.4 cm, tip obtuse or acute. |
|
9b subsp. hazarica |
| + |
Lamina not as above. |
|
(19) |
| |
|
|
|
| 19 (18) |
Branches mostly covered by white bloom. |
|
5 S. capusii |
| + |
Branches not covered by white bloom. |
|
(20) |
| |
|
|
|
| 20 (19) |
Leaf silky on the lower side. |
|
(21) |
| + |
Leaf not silky on the lower side. |
|
(24) |
| |
|
|
|
| 21 (20) |
Catkin 5-8 cm long. |
|
17 S. wallichiana |
| + |
Catkin 1.5-5 cm long. |
|
(22) |
| |
|
|
|
| 22 (21) |
Leaf (linear-) lanceolate, obovate, villous. Capsule 5-7 mm long. |
|
24 S. schugnanica |
| + |
Leaf linear, lanceolate or oblong to ovate-oblong, not villous. Capsule 4-6 mm long. |
|
(23) |
| |
|
|
|
| 23 (22) |
Leaf linear, lanceolate, (5)-12-20 x 0.5-2-(4) cm, lateral veins 25-30 pairs. |
|
20 S. viminalis |
| + |
Leaf broadly lanceolate, oblong to ovate-oblong, 4.5-14 x 1-2.5 cm, lateral veins 16-18-(20) pairs. |
|
21 S. turanica |
| |
|
|
|
| 24 (20) |
Catkin 2 cm or less long. |
|
(25) |
| + |
Catkin 3 cm or more long. |
|
(28) |
| |
|
|
|
| 25 (24) |
Lamina generally more than 1 cm broad. |
|
(27) |
| + |
Lamina 9 mm or less broad. |
|
(26) |
| |
|
|
|
| 26 (25) |
Branches pubescent or silky, rarely glabrate. Leaf exstipute, hairy on the sides, becoming glabrescent, 2-4 mm broad. |
|
3 S. wilhelmsiana |
| + |
Branches glabrous. Leaves stipulate, glabrous or the lower side in young leaves scantily silky, 3-7-(9) mm broad. |
|
4 S. koeieana |
| |
|
|
|
| 27 (25) |
Lamina oblong, elliptic or lanceolate. Stigma entire or 2-lobed. Gland 1. |
|
10 S. caesia |
| + |
Lamina elliptic, ovate or ovate to suborbicular. Stigma 4-lobed. Glands 2. |
|
25 S. sclerophylla |
| |
|
|
|
| 28 (24) |
Lamina 1 cm or less broad. |
|
(29) |
| + |
Lamina generally broader than 1 cm. |
|
(30) |
| |
|
|
|
| 29 (28) |
Ovary and capsule sessile, stigma entire or bilobed. |
|
3 S. wilhelmsiana |
| + |
Ovary and capsule stipitate, stigmas 4 as upright lobes. |
|
7 S. blakii |
| |
|
|
|
| 30 (28) |
Stipules minute or semicordate, coarsely toothed. Stigmas 2-4, longer than the style. Capsule stipe 0.7-2 mm long; fruit 5-9 mm long. |
|
17 S. wallichiana |
| + |
Stipules linear, lanceolate. Stigmas 2-4, shorter or equal to the style. Capsule stipe 0, 1-10 mm long; fruit 4-6 mm long. |
|
(31) |
| |
|
|
|
| 31 (30) |
Stipules persistent. |
|
8 S. sericocarpa |
| + |
Stipules not persistent. |
|
6 S. pycnostachya |
