72. SALICACE.E. 149 



7 0. M YKICACE^l. 



1. MYRfcA. Gale. 



M. GALE, L. Sweet-Gale, Bog or Dutch-Myrtle. An erect 

 branching shrub, 2 3 ft. high. Le. lanceolate, broader upwards, 

 tapering into a short footstalk, toothed above, dotted with resinous 

 glands. Catkins arranged along the ends of the branches. Le. 

 when rubbed emitting an agreeable smell. 



Frequent. In bogs and moors. (B) Sh. 57. East end of Frankfield Loch; 

 Gourock; Kilmun ; Bute; C umbrae and Arran. 



71 BETUL ACE^!. 



1. BETULA. Birch. 



1. B. ALBA, L. White Birch. Le. rhombic or ovato-deltoid, 

 unequally or doubly dentate, acute, with raised veins above. 

 Scales of the fertile catkins 3-lobed, the two lateral lobes spread- 

 ing or slightly recurved. B. verrucosa, Ehr. A well-known tree 

 of great beauty, more especially the variety with drooping 

 branches, found on the borders of Highland lakes. 



Common. Woods and copses in heathy soils. (B) T. 4 5. 



Var. glutinosa, Fr. Often little more than a bush; lateral lobes 

 of the fertile catkins erect or ascending. 



2. B. NANA, L.-- Dwarf Birch. A small shrubby plant, 1 2 

 ft. high. Le. nearly round, with short footstalks, glabrous, ob- 

 tusely and deeply crenate. Catkins small and sessile. Scales 

 3 -cleft, lobes equal. 



Tops of the Highland mountains. " At Bertram, about a mile from Carnwath " 

 Lightf. (H.) Sh. 5. 



2. A'LNUS. Common Alder. 



A. GLUTINOSA, Gaertn. A tree of moderate size, often 

 forming 2 or 3 trunks, with crooked branches. Le. orbicular, 

 wedge-shaped at the base, often lobed and sharply toothed, axils 

 of the le. beneath, with a little tuft of down. Barren catkins 

 long and drooping. Fertile ones small, ovate, often remaining 

 until next season. 



Very common. River banks and moist grounds. (B) T. 3 4. Banks of the 

 Kelvin, &c. 



72 SALICACE^l. 



A. Stamen 1. Filament entire or forked. 



1. SALIX. Willow, Sattoiv, Osier. 



1. S. PURPTJREA. L. Purple- Willoio. A shrub or slender tree, 

 with smooth purplish branches. Le. 2 3 in. lanceolate, broader 



