Salix Salix, L.

Subgen. Caprisalix Dumort . Shrubs or small trees. Catkins sessile or on leafy peduncles, from lateral buds of the previous year. Bracts with dark apex. Stamens 2, free or united. Male and female flowers with a single nectary.

(18-20). S. glauca group. Branches 1 -2 m, thick, knotty, grey-brown, shiny, covered with long hairs, more or less glabrescent. Leaves flat, entire, grey-green, with shallowly impressed veins above, pale blue-green beneath, covered with grey woolly rather long hairs on both surfaces. Catkins long and stout; peduncles leafy. Ovary subsessile, grey-woolly.

The three species given here are distinguished from each other by rather subtle characters, but their taxonomic value is fairly well supported by field evidence as well as from herbarium material.

1 Stipules present, lanceolate 19. stipulifera 1 Stipules usually absent 2 Leaves oblanceolate, subacute, with 7-9(-14) pairs of lateral veins, silky with appressed hairs on both surfaces; capsule

6—7(—10) mm 20. glaucosericea 2 Leaves obovate, ± obtuse, with 5-6(-7) pairs of lateral veins,

less silky, with more intricate hairs; capsule 10-12 mm.

18. glauca

18. S. glauca L. View in CoL , Sp. Pl. 1019 (1753).

Leaves obovate, more or less obtuse, thin, rather bright green, decolorizing rather easily on drying; indumentum moderately dense, of somewhatsilky, slightly intricate, hairs; lateral veins 5-6(-7) pairs; petiole short. Stipules usually absent. Pedicel distinct, as long as the nectary. Capsule 10-12 mm. Iceland, Faeröer, N. & W. Fennoscandia, arctic Russia. FaFeIsNoRs (N) Su.

The plant from Faeröer and Iceland has been considered as a distinct species, S. callicarpaea Trautv. , Nouv. Mém. Soc. Nat. Moscou 2: 295 (1832). It has 2« = 190.