1 |
Branchlets pendulous. |
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(2) |
+ |
Branchlets erect or spreading, not pendulous (except sometimes in S. matsudana). |
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(3) |
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2 (1) |
Filaments ca. as long as or slightly longer than bracts; bracts lanceolate |
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36 Salix babylonica |
+ |
Filaments more than 2 × as long as bracts; bracts elliptic |
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37 Salix pseudolasiogyne |
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3 (1) |
Stamens 2; filaments completely connate. |
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(4) |
+ |
Stamens 2, rarely 3 or 4(or 5) or with intermixture of 3 or 4(or 5 in same catkin); filaments free or connate proximally or at base. |
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(5) |
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4 (3) |
Filaments 5-6 × as long as bracts |
|
47 Salix longistamina |
+ |
Filaments ca. 3 × as long as bracts |
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46 Salix pierotii |
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5 (3) |
Branchlets brownish green |
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28 Salix fragilis |
+ |
Branchlets not brownish green. |
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(6) |
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6 (5) |
Young branchlets tomentose; young leaves sericeous. |
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(7) |
+ |
Young branchlets and leaves glabrous or pilose, neither tomentose nor sericeous. |
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(9) |
|
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|
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7 (6) |
Catkin 3-5 cm; peduncle 5-10 mm; bracts ciliate, adaxially glabrous, abaxially glabrous or pilose at base |
|
27 Salix alba |
+ |
Catkin less than 3 cm; peduncle 3-6 mm; bracts pilose on both surfaces. |
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(8) |
|
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|
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8 (7) |
Filaments connate at base; bracts obovate |
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35 Salix chienii |
+ |
Filaments free; bracts ovate-lanceolate or ovate-oblong |
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29 Salix chikungensis |
|
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|
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9 (6) |
Catkin 3.5-4.5 cm; stamens usually 2, with some intermixture of 3 or 4(or 5) usually in proximal part of catkin |
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26 Salix heteromera |
+ |
Catkin less than 3.5 cm; stamens 2. |
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(10) |
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10 (9) |
Peduncle 8-15 mm. |
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(11) |
+ |
Peduncle less than 7 mm. |
|
(12) |
|
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11 (10) |
Filaments glabrous |
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45 Salix sericocarpa |
+ |
Filaments downy proximally |
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30 Salix jishiensis |
|
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|
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12 (10) |
Branchlets reddish brown or purplish brown; bracts obovate-orbicular |
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34 Salix sphaeronymphoides |
+ |
Branchlets not red or purple; bracts ovate, long ovate, or ovate-elliptic to oblong. |
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(13) |
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13 (12) |
Catkin peduncle 4-5 mm; bracts with long, yellow hairs abaxially and at margin, adaxially subglabrous |
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39 Salix bikouensis |
+ |
Catkin subsessile or shortly pedunculate; bracts without long, yellow hairs. |
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(14) |
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14 (13) |
Catkin shortly pedunculate; bracts ovate, pilose at base; anthers yellow |
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32 Salix matsudana |
+ |
Catkin subsessile; bracts ovate-oblong or ovate-elliptic; anthers usually red. |
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(15) |
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|
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15 (14) |
Bracts pilose on both surfaces or adaxially subglabrous, apex acute; young leaves abaxially pale; filaments free, sometimes connate at base |
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41 Salix koreensis |
+ |
Bracts yellowish pubescent, apex obtuse or retuse; young leaves abaxially with a bluish green tinge; filaments connate proximally, rarely free |
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40 Salix eriocarpa |