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FOC | Family List | FOC Vol. 4 | Salicaceae | Salix

32. Salix Sect. Caesiae A. Kerner, Verh. Zool.-Bot. Ges. Wien. 10: 205. 1860.

杞柳组 qi liu zu

Shrubs. Branches glabrous. Leaf blade oblong, elliptic, obovate, or obovate-lanceolate, glabrous, margin entire, very rarely serrate distally. Flowering coetaneous. Catkins subsessile. Male flower: gland solitary, adaxial; stamens 2; filaments partly connate or connate throughout. Female flower: ovary shortly stipitate or sessile; style short; stigma oblong.

1 Leaves and catkins usually opposite, rarely alternate or subwhorled   242 Salix integra
+ Leaves and catkins alternate.   (2)
2 (1) Juvenile branchlets downy; mature leaf blade 0.5-3 × 0.3-1 cm; male catkin ovoid, 0.5-1 cm; flowering serotinous; shrubs less than 1 m tall   239 Salix caesia
+ Juvenile branchlets glabrous; mature leaf blade 30-70 × 10-30 cm; male catkin cylindric, 2-3 cm; flowering precocious or coetaneous; shrubs more than 1 m tall.   (3)
3 (2) Leaves greenish on both surfaces; male catkin bracts downy on both surfaces; ovary ovoid   241 Salix tarbagataica
+ Leaves adaxially green, abaxially pale; male catkin bracts pilose only at base; ovary conical   240 Salix kochiana

Lower Taxa


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