| 1 |
Branchlets pendulous. |
|
(2) |
| + |
Branchlets erect or spreading, not pendulous (except sometimes in S. matsudana). |
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(3) |
| |
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|
|
| 2 (1) |
Ovary glabrous or slightly pilose at base; bracts lanceolate |
|
36 Salix babylonica |
| + |
Ovary downy proximally; bracts ovate |
|
37 Salix pseudolasiogyne |
| |
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|
| 3 (1) |
Ovary pilose. |
|
(4) |
| + |
Ovary glabrous or pilose at base. |
|
(11) |
| |
|
|
|
| 4 (3) |
Female flower with adaxial and abaxial glands. |
|
(5) |
| + |
Female flower with adaxial gland only. |
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(7) |
| |
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|
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| 5 (4) |
Branchlets yellowish gray or yellowish brown |
|
40 Salix eriocarpa |
| + |
Branchlets grayish brown, brown, or grayish chestnut colored. |
|
(6) |
| |
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| 6 (5) |
Catkin subsessile; style slightly shorter than ovary; bracts ovate-oblong or ovate, apex acute or obtuse |
|
41 Salix koreensis |
| + |
Catkin pedunculate; style much shorter than ovary; bracts subrectangular, apex glandular dentate |
|
42 Salix qinghaiensis |
| |
|
|
|
| 7 (4) |
Flowering catkin 2-3 mm thick |
|
44 Salix sphaeronymphe |
| + |
Flowering catkin less than 3 mm thick. |
|
(8) |
| |
|
|
|
| 8 (7) |
Bracts obovate or obovate-orbicular; ovary broadly ovoid or subglobose |
|
46 Salix pierotii |
| + |
Bracts long ovate or oblong; ovary conical, cylindric-ovoid, ovoid, or narrowly ovoid. |
|
(9) |
| |
|
|
|
| 9 (8) |
Catkin 2-2.5 cm; peduncle 0.8-1.5 cm |
|
45 Salix sericocarpa |
| + |
Catkin 1.5-2 cm; peduncle less than 0.8 cm. |
|
(10) |
| |
|
|
|
| 10 (9) |
Style 2-lobed; bracts long ovate, adaxially ciliate and with long hairs, abaxially with long hairs proximally |
|
47 Salix longistamina |
| + |
Style shallowly 2-lobed; bracts oblong, adaxially glabrous, abaxially with long hairs at base and margin |
|
43 Salix bangongensis |
| |
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|
|
| 11 (3) |
Young branchlets tomentose; young leaves silvery sericeous. |
|
(12) |
| + |
Young branchlets and leaves subglabrous or pilose, neither tomentose nor silvery sericeous. |
|
(13) |
| |
|
|
|
| 12 (11) |
Catkin 3-4.5 cm, to 5.5 cm in fruit; ovary ovoid-conical, 4.5-5 mm; bracts lanceolate or ovate-lanceolate, both surfaces sericeous |
|
27 Salix alba |
| + |
Catkin 1.2-1.8 cm, to 4 cm in fruit; ovary ovoid, ca. 2 mm; bracts ovate, both surfaces glabrous, ciliate |
|
35 Salix chienii |
| |
|
|
|
| 13 (11) |
Glands adaxial and abaxial. |
|
(14) |
| + |
Gland adaxial only (rarely abaxial gland also present). |
|
(17) |
| |
|
|
|
| 14 (13) |
Ovary pilose at base |
|
31 Salix weixiensis |
| + |
Ovary glabrous. |
|
(15) |
| |
|
|
|
| 15 (14) |
Catkin ca. 2 cm, less than 2.5 cm in fruit; bracts ovate, apex obtuse |
|
32 Salix matsudana |
| + |
Catkin (2.5-)3-4 cm; bracts deltoid-lanceolate, apex acute. |
|
(16) |
| |
|
|
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| 16 (15) |
Bracts adaxially with dense hairs, abaxially subglabrous |
|
29 Salix chikungensis |
| + |
Bracts downy on both surfaces |
|
30 Salix jishiensis |
| |
|
|
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| 17 (13) |
Gland very large and broad, nearly surrounding base of ovary |
|
33 Salix pingliensis |
| + |
Gland not large and broad. |
|
(18) |
| |
|
|
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| 18 (17) |
Peduncle with 2 or 3 normal leaflets; ovary pilose at base; bracts ovate-orbicular |
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34 Salix sphaeronymphoides |
| + |
Peduncle without normal leaflets; ovary glabrous; bracts ovate to oblong. |
|
(19) |
| |
|
|
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| 19 (18) |
Peduncle 7-9 mm; bracts with long, yellow hairs on both surfaces; gland large and broad, usually sharply lobed |
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39 Salix bikouensis |
| + |
Peduncle less than 5 mm; bracts without long, yellow hairs; gland narrow, apex entire. |
|
(20) |
| |
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|
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| 20 (19) |
Ovary with stipe extremely short; style short but conspicuous, 2-lobed; catkin 0.8-1.2 cm |
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26 Salix heteromera |
| + |
Ovary sessile; style short, entire at apex; catkin 1.5-1.8 cm |
|
38 Salix capitata |
