uow . \M.\.\ WILD ^'\.^^ 



1. ttET'ULA, Tourn. BIRCH. 



1. B. lenta, L. (CHERRY-BIRCH. SWXKT or !;L . 

 Bark of the trunk dark brown, close, aromatic; that of tl 

 bronze-coloured. Wood rose-coloured. Leaves ovate, -\vith some- 

 what heart-shaped base, doubly serrate, pointed, short-petioled. 

 Fruiting catkins sessile, thick, oblong-cylindrical. MoiVo woods. 



2. B. lu'tea, Michx. (YELLOW or GRAY BIRCH.) Bark of 

 the trunk yellowish-gray, somewhat sil\ 7 ery, scaling off in thin 

 layers. Leaves hardly at all heart-shaped. Fruiting catkins 

 thicker and shorter than in No. 1. Moist woods. 



3. B. papyra'cea, Ait. (B. papyri/era, Michx., in Macoun's 

 Catalogue. ) (?APEK or CAXOE Biurii. ) Bark of the trunk white, 

 easily separating in sheets. Leaves ovate, taper-pointed, heart- 

 shaped, long-petioled. Fruiting catkins cylindrical, usually 

 hanging on slender peduncles. Woods. 



4. B. pu'mila, L. (Low BIRCH.) A shrub' with brownish 



bark, not ylandular. Leaves obovate or roundish, pale L- 

 veinlcts on both surfaces finely reticulated. Catkins mostly 

 erect, on short peduncles. Bogs and low grounds, northward. 



a.- ALNTJS, Touru. ALDEK. . 



1. A.inca'na, Willd. (SPECKLED or HOARY ALDER.) A shrub 

 or small tree, growing in thickets in low grounds along streams. 

 Leaves oval or ovate, rounded at the base, serrate, whitish 

 beneath. Flowers preceding the leaves in early spring, from 

 clustered catkins formed the previous summer and remaining 

 naked over winter. Fruit wingless. 



2. A. vir'idis, DC. (GREEX or MOUNTAIN ALDER.) A shrub 

 3-8 feet high, along mountain streams. Flowers appearing with 

 the leaves, the staminate catkins having remained naked during 

 the winter, the pistillate enclosed in a seal;/ ltd. l'~rn'<t with a 

 thin iciiKj. Northward . 



ORDER LXXXVHI. SALICACEJ3. (WILLOW FAMILY.) 



Trees or shrubs with dia-cioii.s (lowers, both sorts in catkins, 

 one under each scale cf the catkin. JS'o calyx. Fruit 1-celled, 

 many-seeded, the seeds furnished with tufts of down. (See Tart 



