20 THE BRITISH WILLOWS 



A small tree, with branchlets pubescent only while very 

 young, soon glabrous, dark olive brown + polished by the end of 

 the first year; buds ovate-oblong, glabrous, shining. Stipules 

 small, ovate-acuminate, soon deciduous. Leaf-blades 2-4 in. long, 

 sometimes ovate-oblong, usually oblong-lanceolate attenuate, 

 narrowed to the petiole, which is short with 2-4 (or 0) glands, 

 finely serrate, + shining above, paler or glaucous-green and finely 

 reticulate beneath, pubescent at first, soon glabrous. Catkins 

 1-H in. long, rather late in appearing, slender or medium broad, 

 bracts ovate-oblong or oblong, obtuse, subglabrous to subvillous, 

 yellowish ; stamens 3-6, filaments hairy at the base ; ovaries 

 ovate-conic, lower ones rather lax ; style distinct, rather stout ; 

 pedicels as long as the nectaries or a little longer. 



Specimens of this rare hybrid are in existence from Kent (Hb. 

 F. J. Hanbury), Essex, Hunts? (Hb. E. F. Linton), and Westmor- 

 land (Hb. C. E. Salmon and Hb. A. Ley). In Scotland, the 

 Duddingston (Edinburgh) plant described by Dr. B. White 

 (I. c. p. 361) appears likely to be this hybrid ; but the Kestenet 

 plant (foliage only) shows little evidence of S.pentandra. Ireland, 

 near Limerick. Europe : Germany, Lower Austria, Tirol. 



SALIX ALBA X TRIANDRA. 



Syn. S. undulata Ehrh. Beitr. vi. 101 (1791). Syme, E. B. 

 viii. 213. — S. lanceolata Sm. Engl. Fl. iv. 168. Leefe, in Trans. 

 Bot. Soc. Edinb. i. 157. — S. triandra-viminalh var. undulata 

 Wimmer, Flora, xxxii. 39 (1849). — S. triandra-alba Wimmer, Sal. 

 Eur. 144. — S. amygdalina x alba Seemen, iv. 206. [S. subdola 

 B. White, Eevision, 354, is by his herbarium specimens a form of 

 S. viridis Fries.] 



Icones. Forbes, Sal. Wob. 15. E. Bot. 1436, 2061. 



Exs. Hb. Smith. Beichenb. Fl. Germ. exs. No. 960 (Hb. Kew). 

 Leefe, Sal. exs. ii. 37 ; Sal. Brit. exs. No. 9. Magnier, Fl. Select, 

 exs. 2293. Hb. B. White, Nos. 264, 286, 288, 292. E. F. & 

 W. B. Linton, No. 29. Toepffer, Nos. 3a, 4. 



Arborescent shrub with olive-brown branches, bark flaking off 

 the trunk twigs, pubescent at the very first, soon glabrescent. 

 Stipules ^-cordate-lanceolate. Leaf-blades 3-5 in. long, oblong- 

 lanceolate, usually narrow attenuate to a fine tip, narrowed to the 

 moderate petiole, finely and sharply serrulate, dull green hardly 

 shining above, pale green beneath, silkily pilose at first, soon 

 glabrous. Catkins l|-2i in. long, coeval with the leaves on leafy 

 peduncles ; bracts yellowish or greenish-yellow, concolorous, ovate 

 or narrowly obovate roundly obtuse above, concave, slightly hairy 

 at the base, more so at the bearded tip ; ovaries ovate-conic, gla- 

 brous ; nectaries broad ^-clasping the somewhat longer pedicels ; 

 styles distinct, short, rather thick ; stigmas usually bifurcate. 



S. undulata Ehrh. has been confused by many writers with 

 S. hippophacfolia Thuill. (S. triandra x viminalis), there being a 

 good deal of similarity. Wimmer says that Ehrhart himself 

 mixed them, which would account for the ovaries having been 

 described by some authors as pubescent ; whereas Smith, who 

 had seen Ehrhart's original specimens, declares they were gla- 



