| 1 |
Filaments glabrous. |
|
(2) |
| + |
Filaments villous at base. |
|
(3) |
| |
|
|
|
| 2 (1) |
Filaments distinct or partly connate; bracts ovate or oblong-ovate, with long hairs on both surfaces or adaxially subglabrous |
|
92 Salix etosia |
| + |
Filaments completely free; bracts long obovate-elliptic, glabrous on both surfaces, ciliate |
|
94 Salix austrotibetica |
| |
|
|
|
| 3 (1) |
Adaxial gland present (sometimes also abaxial gland in S. mictotricha). |
|
(4) |
| + |
Adaxial and abaxial glands present. |
|
(13) |
| |
|
|
|
| 4 (3) |
Bracts glabrous. |
|
(5) |
| + |
Bracts pilose. |
|
(9) |
| |
|
|
|
| 5 (4) |
Bracts broadly ovate or oblong. |
|
(6) |
| + |
Bracts obovate. |
|
(7) |
| |
|
|
|
| 6 (5) |
Bracts oblong, apex 2-notched; catkin 1-2.5 cm; adaxial gland terete |
|
78 Salix wangiana |
| + |
Bracts broadly ovate, apex rounded or subtruncate; catkin 1-1.5 cm; adaxial gland broad |
|
82 Salix rhoophila |
| |
|
|
|
| 7 (5) |
Adaxial gland ovate; bracts ca. 1/2 as long as stamens; catkin 2.5-4.5 cm |
|
75 Salix hypoleuca |
| + |
Adaxial gland terete; bracts ca. 1/3 as long as stamens; catkin generally less than 2.5 cm. |
|
(8) |
| |
|
|
|
| 8 (7) |
Catkin 1.8-2.5 cm; filaments downy at base; leaf abaxially greenish, margin entire |
|
84 Salix tangii |
| + |
Catkin ca. 2.5 cm; filaments villous in proximal 1/2; leaf abaxially pale, margin dentate |
|
88 Salix denticulata |
| |
|
|
|
| 9 (4) |
Bracts not ciliate, pilose at least on 1 surface. |
|
(10) |
| + |
Bracts ciliate, pilose or glabrous on both surfaces. |
|
(11) |
| |
|
|
|
| 10 (9) |
Catkin 3-4 cm; bracts pilose adaxially; gland 1, adaxial |
|
83 Salix polyclona |
| + |
Catkin ca. 2.8 cm; bracts tomentose abaxially; sometimes also with abaxial gland present |
|
81 Salix mictotricha |
| |
|
|
|
| 11 (9) |
Cilia longer than bracts; bracts yellowish green or brown distally |
|
80 Salix luctuosa |
| + |
Cilia shorter than or ca. as long as bracts; bracts brown or yellowish green. |
|
(12) |
| |
|
|
|
| 12 (11) |
Peduncle 5-15 mm |
|
86 Salix cathayana |
| + |
Peduncle ca. 3 mm |
|
87 Salix maerkangensis |
| |
|
|
|
| 13 (3) |
Bracts glabrous. |
|
(14) |
| + |
Bracts pilose. |
|
(17) |
| |
|
|
|
| 14 (13) |
Catkin 2-6 cm × (3-)5-7 mm; branchlets yellow, yellowish brown, or blackish. |
|
(15) |
| + |
Catkin 1-2.5 cm × 3-4 mm; branchlets dull brown, brownish red, or purplish. |
|
(16) |
| |
|
|
|
| 15 (14) |
Bracts suborbicular; branchlets yellow or yellowish brown |
|
68 Salix dissa |
| + |
Bracts ovate-elliptic; branchlets blackish |
|
72 Salix longiflora |
| |
|
|
|
| 16 (14) |
Young branchlets glabrous |
|
64 Salix tenella |
| + |
Young branchlets tomentulose |
|
65 Salix pseudowolohoensis |
| |
|
|
|
| 17 (13) |
Bracts without long hairs, sparsely ciliate. |
|
(18) |
| + |
Bracts with long hairs. |
|
(20) |
| |
|
|
|
| 18 (17) |
Bracts oblong-elliptic, yellowish green or apically brown |
|
79 Salix delavayana |
| + |
Bracts obovate to orbicular, yellowish brown or dull brown. |
|
(19) |
| |
|
|
|
| 19 (18) |
Catkin to 6 cm × 3-5 mm |
|
63 Salix guebriantiana |
| + |
Catkin 1-1.5 cm × ca. 3 mm |
|
69 Salix heishuiensis |
| |
|
|
|
| 20 (17) |
Branchlets densely tomentulose and dirty colored |
|
67 Salix praticola |
| + |
Branchlets pilose or glabrous, neither tomentulose nor dirty colored. |
|
(21) |
| |
|
|
|
| 21 (20) |
Bracts ciliate, glabrous on both surfaces |
|
70 Salix zhegushanica |
| + |
Bracts with long hairs on both surfaces or at least on 1 surface and on margin. |
|
(22) |
| |
|
|
|
| 22 (21) |
Bracts with long hairs only on 1 surface and on margin; young branchlets pilose |
|
73 Salix paratetradenia |
| + |
Bracts with long hairs on both surfaces and margin; young branchlets pilose or glabrou. |
|
(23) |
| |
|
|
|
| 23 (22) |
Young leaf blade elliptic or obovate-elliptic |
|
74 Salix oreinoma |
| + |
Young leaf blade oblong-lanceolate |
|
66 Salix daguanensis |
