| 1 |
Flowering precocious |
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110 Salix clathrata |
| + |
Flowering coetaneous. |
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(2) |
| |
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| 2 (1) |
Filaments pilose proximally. |
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(3) |
| + |
Filaments glabrous or pilose at base. |
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(6) |
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| 3 (2) |
Juvenile branchlets densely yellowish brown hirsute |
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111 Salix hirticaulis |
| + |
Juvenile branchlets not yellowish brown hirsute. |
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(4) |
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| 4 (3) |
Bracts glabrous on both surfaces, or sparsely pilose only at base |
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125 Salix ludingensis |
| + |
Bracts abaxially villous, adaxially glabrous. |
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(5) |
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| 5 (4) |
Juvenile branchlets villous; leaf blade ovate-oblong or obovate-oblong, abaxially glaucous and sericeous |
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115 Salix pilosomicrophylla |
| + |
Juvenile branchlets coarsely hispid; leaf blade obovate or elliptic, abaxially greenish, with long hairs along veins, pubescent when young |
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112 Salix kamanica |
| |
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| 6 (2) |
Filaments pilose at base. |
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(7) |
| + |
Filaments glabrous. |
|
(12) |
| |
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| 7 (6) |
Leaf blade elliptic, obovate-elliptic, or ovate. |
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(8) |
| + |
Leaf blade oblong, obovate-oblong, or obovate-lanceolate. |
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(10) |
| |
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| 8 (7) |
Leaf blade ca. 8 × 3.5(-5.5) mm |
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109 Salix crenata |
| + |
Leaf blade (5-)10(-20) mm. |
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(9) |
| |
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| 9 (8) |
Juvenile branchlets with sparse, long hairs or glabrous; catkin ovate-orbicular; bracts glabrous |
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107 Salix brachista |
| + |
Juvenile branchlets densely white villous; catkin cylindric; bracts pilose adaxially and at margin |
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120 Salix kangdingensis |
| |
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| 10 (7) |
Leaf blade 12-16 × 4-6 mm |
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121 Salix lindleyana |
| + |
Leaf blade 4-10 × 1-4 mm. |
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(11) |
| |
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| 11 (10) |
Catkin few flowered; leaf blade oblong, cuneate at both ends, margin entire |
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124 Salix gyirongensis |
| + |
Catkin many flowered; leaf blade obovate-oblong, base cuneate, margin dentate distally |
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116 Salix serpyllum |
| |
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| 12 (6) |
Leaves very small, usually less than 4 mm |
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117 Salix ovatomicrophylla |
| + |
Leaves more than 4 mm. |
|
(13) |
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| 13 (12) |
Leaf margin entire, or dentate on distal part of branchlets (dentate in S. piptotricha and S. paraflabellaris). |
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(14) |
| + |
Leaf margin dentate (sometimes subentire in S. calyculata var. gongshanica). |
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(17) |
| |
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| 14 (13) |
Leaf blade elliptic, ovate-elliptic or ovate-oblong, margin entire. |
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(15) |
| + |
Leaf blade obovate, obovate-orbicular, or elliptic, margin entire or dentate. |
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(16) |
| |
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| 15 (14) |
Petiole 4-7 mm |
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114 Salix souliei |
| + |
Petiole 1-2 mm |
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123 Salix scopulicola |
| |
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| 16 (14) |
Bracts obovate |
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126 Salix piptotricha |
| + |
Bracts ovate-oblong |
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118 Salix paraflabellaris |
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| 17 (13) |
Leaf margin in distal 1/2 of leaves with 3-5 deeply indented teeth, entire proximally |
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119 Salix oreophila |
| + |
Leaf margin crenate or subentire. |
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(18) |
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| 18 (17) |
Bracts sparsely ciliate |
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108 Salix anticecrenata |
| + |
Bracts glabrous. |
|
(19) |
| |
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| 19 (18) |
Catkin ca. 1.5 cm, many flowered; leaf blade abaxially greenish, margin dentate |
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113 Salix flabellaris |
| + |
Catkin ca. 5 mm, few flowered; leaf blade abaxially pale, margin indistinctly dentate or subentire |
|
106 Salix calyculata |
