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57 i BETULACEiE (Skan). [Alnus. 



Trees or shrubSj often growing in wet places ; leaves alternate, deciduous, tootlied, 

 Bometimes slightly or deeply lobed, rarely entire ; stipules enclosing the leaf in bud, 

 caducous; catkins or spikes 2-4 or more, uciually distinctly pedunculate, racemosely 

 arranged in terminal or axillary clusters. 



DiSTRiB. Species 17, chiefly in Europe, Temperate Asia and Xorth America, 

 1 in North and South Africa and a few in Central and South America. 



1. A. glutinosa (Gairtn. De Fruct. ii. 54, t. 90, fig. 2) ; usually a 

 small tree, but sometimes reaching aheiglit of 50-60 or even 100 ft., 

 often a large bush ; bark in young trees smooth and greenish, 

 afterwards brownish-black and rough; branchlets usually glabrous, 

 glandular; leaves broadly obovate, suborbicular or sometimes 

 ovate-elliptic, l|-4 in. long, l]:-3;^ in. broad, rounded, truncate or 

 retuse at the apex, usually cuneate at the base, sometimes slightly 

 lobed, callose-serrate, dark green, glabrous and shining above, light 

 green, haiiy along the principal veins and in their axils beneath, 

 glutinous when young ; petiole up to 1^ in. long, glabrous or 

 pubescent ; stipules ovate to lanceola^te, obtuse, glandular-hairy on 

 the margin; catkins 3-6, racemosely arranged on short terminal or 

 subterminal branchlets ; male catkins pendulous, cylindric, 1-^—4 in. 

 long ; female catkins erect, at first cylindric, green, up to 5 lin. 

 long, when mature ovoid, cone-like, black, 5-9 lin. long; nutlets 

 obovate, about 1^ lin. long, wingless or with a narrow coriaceous 

 wing, Ilarv, Gen. S. Afr. PI. ed. 2, 347 ; Sowcrhy, Engl. BoL ed. 

 Sijmc, viii. 178, L 794; Boiss, FL Orient iv. 1180; Battand. tC Trah, 

 FL Alger, 818; Whxlder in Engl. Pjianzenr. Belulac, 115; Elwes & 

 Henrjj^ Trees Gt. Brit, d' Irel. iv. 937. Alnus [sp,], Drege, Zicei Pfi. 

 Documentej 99, lOL Betida Almis ghitinosa^ Linn, Sp. PL ed. i. 983. 

 B. Alnus, Scojp. FL Cam. ed. 2, ii. 233» B, glutinosa, Lam. Encj/cL 

 i. 454. For full synonymy see WinJcIer, Lc. 



Coast Region : Paarl Div. ; by the Eerg River, near Paarl, and between Paarl 

 and French Hoek, Drege, 8253 ! Cape Div. ? Banks <C: Solancler ! 



''The common Alder {Al^nus glutinosa) is found throughout the colony, 

 apparently wild, but whether truly so or not I cannot say " (Harvey, Gen. S. Afr. 

 PL ed. 2, 347). J ^ J> 



^ Also in nearly the whole of Europe, Siberia, "Western A^ia and North Africa. 

 Naturalised in the North-Enstern United States of America. 



Oedee CXXV. SALICITSE-ffi. 



(By S. a. Skan.) 



Floicers dioecious, one under each bract, in cylindric catkins or 

 more rarely in racemes, ebracteolate. Perianth 0. Disc of 2 gland- 

 like scales, one posterior, the other anterior, or one only and then 

 posterior, sometimes cup-shaped, obliquely truncate, crenate or 

 variously lobed, Male flowers: stamens 2 to many; filaments 



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