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| 1 |
Leaf blade broadly obovate-orbicular, ovate, or suborbicular, apex obtuse, rarely acute. |
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(2) |
| + |
Leaf blade elliptic, ovate, or obovate, apex acute, rarely obtuse. |
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(5) |
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| 2 (1) |
Leaf blade pale abaxially. |
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(3) |
| + |
Leaf blade greenish abaxially. |
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(4) |
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| 3 (2) |
Leaf blade broadly obovate-orbicular, rust-colored or white pubescent when young, margin entire or crenate |
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104 Salix coggygria |
| + |
Leaf blade ovate to suborbicular, glabrous, margin entire |
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99 Salix vaccinioides |
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| 4 (2) |
Leaf blade obovate-elliptic, 2-5 × 1.5-2.5 cm, adaxially dull green, abaxially light green, remotely crenate-serrate |
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105 Salix annulifera |
| + |
Leaf blade broadly obovate to orbicular-elliptic, 1.5-4 × 1.2-2.5 cm, adaxially dull green, abaxially grayish green, or sparsely glandular serrate |
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100 Salix resectoides |
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| 5 (1) |
Leaf blade floccose abaxially |
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102 Salix floccosa |
| + |
Leaf blade glabrous or downy abaxially, not floccose. |
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(6) |
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| 6 (5) |
Leaves appressed villous on both surfaces |
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103 Salix zayulica |
| + |
Leaves adaxially glabrous or pubescent along veins, abaxially glabrous or downy when young, glabrescent. |
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(7) |
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| 7 (6) |
Leaf margin conspicuously incurved glandular crenate, blade ovate, obovate, oblong, or spatulate, 1-2(-3) × 0.8-1.3(-2.2) cm |
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97 Salix microphyta |
| + |
Leaf margin entire, crenate, or remotely glandular dentate, not incurved, blade elliptic, obovate-elliptic, or oblong, longer and broader. |
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(8) |
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| 8 (7) |
Leaf margin entire |
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95 Salix jingdongensis |
| + |
Leaf margin dentate. |
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(9) |
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| 9 (8) |
Young branchlets pilose; leaf margin indistinctly sparsely glandular serrate |
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101 Salix opsimantha |
| + |
Young branchlets glabrous; leaf margin crenate or crenate-serrate. |
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(10) |
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| 10 (9) |
Leaf margin crenate or crenate serrate |
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96 Salix faxonianoides |
| + |
Leaf margin serrate distally |
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98 Salix kungmuensis |
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