| 1 |
Leaf margin dentate. |
|
(2) |
| + |
Leaf margin entire, rarely with inconspicuous, gland-tipped teeth. |
|
(7) |
| |
|
|
|
| 2 (1) |
Leaf blade more than 7 cm, elliptic, narrowly ovate, or oblong, rarely obovate-lanceolate. |
|
(3) |
| + |
Leaf blade less than 7 cm, obovate-oblong or obovate-elliptic, rarely oblong or elliptic. |
|
(5) |
| |
|
|
|
| 3 (2) |
Leaf margin crenate or irregularly sinuolate-crenate |
|
152 Salix phanera |
| + |
Leaf margin glandular serrulate. |
|
(4) |
| |
|
|
|
| 4 (3) |
Juvenile branchlets with filamentous hairs at base |
|
148 Salix fargesii |
| + |
Juvenile branchlets densely gray woolly |
|
157 Salix argyrophegga |
| |
|
|
|
| 5 (2) |
Leaves abaxially tomentose |
|
166 Salix bistyla |
| + |
Leaves abaxially glabrous. |
|
(6) |
| |
|
|
|
| 6 (5) |
Leaf margin serrulate |
|
154 Salix spathulifolia |
| + |
Leaf margin remotely crenate-serrulate, sometimes entire |
|
151 Salix plocotricha |
| |
|
|
|
| 7 (1) |
Leaves opposite |
|
158 Salix salwinensis |
| + |
Leaves alternate. |
|
(8) |
| |
|
|
|
| 8 (7) |
Leaves sessile or subsessile |
|
157 Salix argyrophegga |
| + |
Leaves conspicuously petiolate. |
|
(9) |
| |
|
|
|
| 9 (8) |
Lateral veins diverging at almost 90° |
|
165 Salix nujiangensis |
| + |
Lateral veins diverging at 45° or less. |
|
(10) |
| |
|
|
|
| 10 (9) |
Leaves abaxially sericeous. |
|
(11) |
| + |
Leaves not abaxially sericeous. |
|
(13) |
| |
|
|
|
| 11 (10) |
Leaves abaxially lead gray sericeous |
|
163 Salix daltoniana |
| + |
Leaves abaxially white sericeous. |
|
(12) |
| |
|
|
|
| 12 (11) |
Leaf margin serrulate, rarely entire, apex acuminate to long acuminate; petiole more than 10 mm |
|
153 Salix phaidima |
| + |
Leaf margin sometimes with gland-tipped teeth, apex acute, rarely acuminate; petiole 6-7 mm |
|
160 Salix daliensis |
| |
|
|
|
| 13 (10) |
Leaves abaxially glabrous, comose along veins. |
|
(14) |
| + |
Leaves abaxially pilose. |
|
(15) |
| |
|
|
|
| 14 (13) |
Leaf blade oblanceolate or obovate-elliptic, abaxially comose along veins |
|
155 Salix spodiophylla |
| + |
Leaf blade narrowly elliptic, abaxially glabrous |
|
162 Salix divergentistyla |
| |
|
|
|
| 15 (13) |
Leaf blade lanceolate |
|
159 Salix psilostigma |
| + |
Leaf blade not lanceolate. |
|
(16) |
| |
|
|
|
| 16 (15) |
Leaves abaxially greenish. |
|
(17) |
| + |
Leaves abaxially whitish. |
|
(18) |
| |
|
|
|
| 17 (16) |
Leaves abaxially tomentose |
|
149 Salix ernestii |
| + |
Leaves pilose or subglabrous |
|
150 Salix eriostachya |
| |
|
|
|
| 18 (16) |
Leaf blade elliptic, rarely narrowly elliptic, abaxially tomentose or glabrescent, margin entire or with inconspicuous, gland-tipped teeth |
|
156 Salix balfouriana |
| + |
Leaf blade obovate or oblong-obovate, abaxially downy, occasionally inconspicuously crenate |
|
167 Salix fengiana |
