Salix Sect. Helix in Flora of China @ efloras.org

36. Salix Sect. Helix Dumortier, Bijdr. Natuurk. Wetensch. 1(1): 56. 1826.

筐柳组 kuang liu zu

Shrubs. Leaf blade lanceolate to linear. Flowering coetaneous or precocious. Catkins pedunculate or subsessile; bracts uniformly colored or 2-colored. Male flower: glands adaxial; stamens 2, connate throughout or filaments partly united; anthers 2- or 4-loculed. Female flower: ovary pilose or glabrous, stipitate or subsessile; style and stigma short or nearly absent.

Key based on male plants

1 Catkins opposite 263 Salix koriyanagi

+ Catkins alternate. (2)

2 (1) Catkin 3-4(-5) mm thick. (3)

+ Catkin 4-7 mm thick. (7)

3 (2) Peduncle of catkin 5-10 mm. (4)

+ Catkin sessile or subsessile. (5)

4 (3) Mature shoots purplish brown; young leaf blade lanceolate, margin not serrate 259 Salix kirilowiana

+ Mature shoots yellowish; leaf blade linear-lanceolate, margin serrate 261 Salix gracilior

5 (3) Bracts uniformly colored, long obovate 271 Salix suchowensis

+ Bracts 2-colored, ovate-oblong or obovate. (6)

6 (5) Bracts ovate-oblong 272 Salix psammophila

+ Bracts obovate 269 Salix linearistipularis

7 (2) Bracts 2-colored, blackened distally 265 Salix tenuijulis

+ Bracts uniformly colored, rarely dull brown at apex. (9)

8 Filaments connate throughout length 270 Salix sungkianica

+ Filaments connate proximally 257 Salix yumenensis

9 (7) Anthers red or in proximal part of catkin yellow. (10)

+ Anthers yellow. (11)

10 (9) Catkin pedunculate, bearing 2 or 3 leaflets 262 Salix yanbianica

+ Catkin sessile or subsessile, leafless or bearing 2 leaflets 268 Salix donggouxianica

11 (9) Bracts very small; filaments pilose at base 267 Salix caspica

+ Bracts wide and large; filaments downy proximally. (12)

12 (11) Bracts spatulate or long ovate, abaxially wrinkled 260 Salix pycnostachya

+ Bracts oblong or oblong-obovate, abaxially not wrinkled 255 Salix capusii

List of Keys

List of lower taxa