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

20. Salix pentandra Linnaeus, Sp. Pl. 2: 1016. 1753.

五蕊柳 wu rui liu

Shrubs or trees to 5 m tall; bark gray or grayish brown. Juvenile branchlets brownish green, grayish green, or grayish brown, glabrous, shiny. Stipules when present oblong or broadly ovate, deciduous, sometimes absent; petiole 2-14 mm, apex glandular; leaf blade broadly lanceolate, ovate-oblong, or elliptic-lanceolate, 3-13 × 2-4 cm, leathery, viscid when young, abaxially greenish, pruinose or glabrous, adaxially dull green, shiny, base obtuse or cuneate, margin glandular serrate, apex acuminate. Male catkin 2-4(-7) × 1-1.2 cm; bracts green, lanceolate, oblong, elliptic, deltoid-obovate, or obovate-oblong, ca. 2.5 mm, 2- or 3-veined, margin glandular dentate or entire, apex rounded or obtuse. Male flower: glands cylindric, ca. 1 mm, adaxial gland usually 2- or 3-lobed; stamens (5 or)6-9(-12); filaments ca. 4.5 mm, unequal, villous at base. Female catkin 2-6 cm × ca. 8 mm. Female flower: adaxial gland 1, rarely 2, 1- or 2-parted, narrowly ovate or ovate, apex truncate, abaxial gland sometimes absent; ovary ovoid-conical, glabrous, subsessile; style and stigma conspicuous, 2-parted. Capsule ca. 9 mm, shiny, shortly stipitate. Fl. Jun, fr. Aug-Sep. 2n = 76.

Margins of woods near rivers, marshes and meadows within forests, valleys; 500-1700 m. Hebei, Heilongjiang, Jilin, Liaoning, E Nei Mongol, Xinjiang [Mongolia, Russia; Europe].

1 Leaves exstipulate, abaxially pruinose; juvenile branchlets olive greenish or yellowish brown   20b var. intermedia
+ Leaves stipulate, abaxially glabrous; juvenile branchlets brownish green, grayish green, or grayish brown.   (2)
2 (1) Bracts lanceolate, oblong, or elliptic, adaxial gland usually 2- or 3-lobed, abaxial gland sometimes absent   20a var. pentandra
+ Bracts deltoid-obovate or obovate-oblong; adaxial and abaxial glands often divided   20c var. obovalis

Lower Taxa


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