14 
SALIX 
darker towards the tip. Nectaries at least 2 to each flower, either free or slightly united at the base 
and more or less surrounding the base of the stamens or ovary. Stamens 2, with filaments and anthers 
free. Style short. Stigmas bifid. Capsules hairy or glabrous. 
Section III. Vetrix (p. 28). Small trees, shrubs, or undershrubs. La 7 ninae ovate to elliptical- 
acute. Catkins usually lateral, ovate or ovate-cylindrical, usually appearing before the leaves, sessile or 
shortly peduncled. Bracts usually discolorous. Nectaries 1 to each flower. Stamens 2 ; filaments 
free or united a little at the base ; anthers free. Style long or short. Stigmas entire to bifid. 
Capsules hairy or glabrous. 
Section IV. Vimen (p. 58). Small trees or shrubs, usually osiers and of lowland distribution. 
Laminae linear to broadly lanceolate or narrowly elliptical, very much longer than broad. Catkins 
lateral, usually much longer than broad, cylindrical, sessile or subsessile, appearing before or with 
the leaves. Bracts discolorous. Nectaries 1 to each flower. Stamens 2. Filaments free, or partially 
or wholly coherent. Anthers free or coherent. Style long. Capsules glabrous or pubescent. 
Section I. AM ERIN A 
Amerina Du Mortier in Bijdr. Natuurk. Wetensch. (15) (1825); in Bull. Bot. Soc. Belg. i, 145 (1862); 
Fries FI. Suec. Mant. i, 41 (1832); Babington in Journ. Bot. i, 170 (1863); Albella [Seringe Sal. Rev. ined., ex] 
Duby Bot. Gall, i, 425 (1828) including 5 . pentandra p. 427. 
For characters, see page 13. 
Series of Amerina 
Series i. Pentandrae (see below). Small trees and shrubs. Branches spreading. Petioles 
at maturity strongly glandular near the junction of the laminae. Laminae glandular-serrate, glabrous, 
shining above, more or less fragrant and viscid when young, asymmetrical. Catkins suberect or 
pendulous. Bracts brownish-yellow, falling off before the fruit is mature. Nectaries 2 (rarely 3 or 4) 
to each flower, sometimes more or less united at the base. Stamens 4 — 12, rarely more, usually 5, 
not infrequently 4 — 6. Style short or absent. Stigmas bifid, short. Capsules subsessile or stalked. 
Series ii. Fragiles (p. 17). Trees, often tall trees, or large shrubs. Young branches slender, 
ascending. Laminae lanceolate, either glabrous or silvery with hairs on the upper surface. Catkins 
often curved. Bracts yellowish, falling off before the fruit is mature. Nectaries 2 to each staminate 
flower, 1 — 2 (usually 1) to each pistillate flower; when 2, either surrounding the base of the stamens or 
pedicel, or free at the base with the anterior one smaller and arising at a higher level than the posterior 
one, anterior one sometimes more or less crenate at the top. Stamens 2 — 6, usually 2, not very rarely 
2 — 3 (especially in S. fragilis var. latifolia and var. decipiens'). Style very short or distinct. Stigmas 
bifid. Capsules sessile, subsessile, or stalked. 
Series iii. Triandrae (p. 22). Shrubs or small trees. Laminae lanceolate to narrowly ovate, 
glabrous. Catkins ascending or spreading, on short peduncles. Bracts with yellow veins, persisting as 
long as the capsules. Nectaries 2 to each staminate flower, free at the base, 1 to each pistillate flower. 
Stamens 2 — 5, usually 3. Style very short. Capsules on rather long stalks. 
Series i. Pentandrae 
Pentandrae Borrer in Hooker Brit. FI. 416 (1830); A. et G. Camus Classif. Saul. 84 (1904) as a sub- 
section; Lucidae v. pentandrae Andersson Monogr. Sal. 30 (1867); Lucidae v. Seemen in Ascherson und Graebner 
Syn. iv, 56 et 61 (1908). 
For characters, see above. 
Species and hybrids of Pentandrae 
1. S. pentandra (see below). Laminae acute to acuminate, very odorous when young. Catkins 
late May and June. Stamens usually 5. 
& alba x pentandra (p. 16). Laminae like those of S', alba in shape, but lacking at maturity the 
silvery hairs of this species, and sometimes much larger. Catkins appearing in May. Stamens usually 6. 
fragilis x pentandra (p. 16). Laminae more acuminate than in S. pentandra. Catkins appearing 
in May. Stamens usually 4. 
