CHAP. CIU. SALICACEM. SA^LIX. 1577 



more in length, downy. Catkins from 2 in. to 3 in. long when matured. 

 The branches are brittle, and apt to break when used for tying. There are 

 plants at Woburn, Henfield, and Flitwick. 



Group xviii. Bicolbres Borrer. 

 Bushy Shrubs, with heaves dark green above, and glaucous beneath. 



Stamens 2 to a flower. Ovaries silky. Leaves between obovate and lanceo- 

 late, glabrous, or nearly so ; dark green on the upper surface, very glaucous 

 on the under one. Plants twiggy bushes. (Hook. Br. FL, ed. 2., adapted.) 

 Koch has included under one species, to which he has applied the name 

 S. arbuscula Wahlenberg, several of the species or kinds of this group. 

 The constituents of this species are as follows : — As synonymes, S. arbus- 

 cula Wahlenb. Fl. Lapp., No. 476., Fl. Suec., No. 1122.; S. arbuscula 

 a Lin. Suec., No. 386., Sp. PL, p. 1445., not of Smith, nor Vahl, nor 

 Jacq. — As varieties, Lin. Fl. Lapp., t. 8. f. c. ; S. /mylicifdlia Smith Fl. 

 Brit. ; S. radicans Smith Fl. Brit. ; S. tetrapla Walker; S. humilis Willd. 

 Berl. Baumz. ; S. Dlcksonidna Smith ; S. Weigeliana Willd. Sp. PL, p. 678. ; 

 S. /aurina Smith; S. majalis Wahlenb. Fl. Lapp., p. 270.; S. tenuifolia 

 Smith Fl. Brit.; S. petrae'a Anderson; S. Crovsedna Smith. Dr. Lindley, 

 in his Synopsis of the British Flora, has added to these the following kinds, 

 elucidated by Borrer in Eng. Bot. Suppl., and treated as species below : 

 — S. laxiflora Borrer ; S. phillyreifolia Borrer ; S. propinqua Borrer ; S. 

 Weigelidna Borrer ; S. nitens Smith; S. tenuior Borrer. In the part of the 

 prefatory matter of the group Nigricantes relating to S. johylicifolia Koch, 

 some information on the above S. arbuscula Koch is incidentally given. 



3£ 129. S. teni^ior Borrer. The narrower-leaved intermediate Willow. 



Identification. Borrer in Eng. Bot. Suppl., t. 2650. ; Hook. "Br. FL, ed. 2., p. 425. 



Synonymes. Specimens were communicated to Smith, who appears to have united this kind with 



the S. taurina Smith, the S. bicolor Smith Eng. Bot., t. 1806. {Borrer.) 

 The Sexes. The female is described and figured in Eng. Bot. Suppl.; the male is not known. 

 Engraving. Eng. Bot. Suppl., t. 2650. 



Spec. Char., fyc. Disk of leaf obovate-lanceolate, acute, obsoletely crenate, 

 flat ; glabrous on both surfaces, glaucous on the under one. Petiole slender. 

 Stipules acute, glandulose. Catkin slender. Flowers laxly disposed in the 

 catkin. Bracteas (scales) acute, longer than the silky stalk of the capsule. 

 Style longer than the ovate stigmas (Borrer.) Found by the river Lochy, 

 near Kfllin, in Breadalbane. The specimens figured were taken from a 

 plant brought thence in 1810. An upright shrub, 15 ft. or more high. 

 Branches loosely spreading. Disk of leaves about 2 in. long, when first 

 unfolded, sprinkled with appressed hairs on both surfaces, but soon becom- 

 ing glabrous except the midrib; upper surface dark green and shining. 

 Petiole long, pale, downy. The flowers appear, with Mr. Borrer, earlier 

 than the leaves, about the beginning of May. Catkin about 1 in. long, 

 while the flowers are in blossom ; eventually about 2 in. Mr. Borrer has 

 indicated its affinity as follows : — Very near S. /aurina Smith ; and, like 

 it, intermediate between the common sallows and the glabrous bright- 

 leaved affinities of S. /mylicifolia ; resembling some of the former more 

 nearly in general habit and in the shape of the leaves ; the latter, in the 

 deciduous nature of the pubescence, and in the glandulose stipules. S. 

 nigricans angustifolia Scringe Saules de la Suisse, No. 22. : it is very similar 

 to S. tenuior Borrer. There are plants at Henfield, and in the Goldworth 

 Arboretum. 



