What is "betula glandulosa"

Birch \Birch\ (b[~e]rch), n.; pl. Birches (-[e^]z). [OE. birche, birk, AS. birce, beorc; akin to Icel. bj["o]rk, Sw. bj["o]rk, Dan. birk, D. berk, OHG. piricha, MHG. birche, birke, G. birke, Russ. bereza, Pol. brzoza, Serv. breza, Skr. bh[=u]rja. [root]254. Cf. 1st Birk.]

1. A tree of several species, constituting the genus Betula; as, the white or common birch ( Betula alba) (also called silver birch and lady birch); the dwarf birch ( Betula glandulosa); the paper or canoe birch ( Betula papyracea); the yellow birch ( Betula lutea); the black or cherry birch ( Betula lenta).

2. The wood or timber of the birch.

3. A birch twig or birch twigs, used for flogging.

   Note: The twigs of the common European birch (B. alba), being tough and slender, were formerly much used for rods in schools. They were also made into brooms.

   The threatening twigs of birch.
   --Shak.

4. A birch-bark canoe. Birch of Jamaica, a species ( Bursera gummifera) of turpentine tree. Birch partridge. (Zo["o]l.) See Ruffed grouse. Birch wine, wine made of the spring sap of the birch. Oil of birch.

   1. An oil obtained from the bark of the common European birch ( Betula alba), and used in the preparation of genuine (and sometimes of the imitation) Russia leather, to which it gives its peculiar odor.

   2. An oil prepared from the black birch ( Betula lenta), said to be identical with the oil of wintergreen, for which it is largely sold.

Betula glandulosa, American Dwarf Birch, also known as Resin Birch or Shrub Birch, is a species of birch native to North America, occurring in arctic and cool temperate areas from Alaska east to Newfoundland and southern Greenland, and south at high altitudes to northern California and Colorado in the west, and locally south to northern New York in the east. In the Arctic it occurs down to sea level, while in the south of the range, it grows as high as 3400 m altitude.

American Dwarf Birch is a multi-stemmed shrub typically growing to 1–3 m tall, often forming dense thickets. The trunks are slender, rarely over 5–10 cm diameter, with smooth, dark brown bark. The leaves are nearly circular to oval, 0.5–3 cm long and 1.2.5 cm broad, with a toothed margin. The fruiting catkins are erect, 1-2.5 cm long and 5–12 mm broad.

It is closely related to the Dwarf Birch (Betula nana), and is sometimes treated as a subspecies of it, as B. nana subsp. glandulosa. It is distinguished from typical B. nana by the presence of glandular warts on the shoots and longer leaf petioles. Hybrids with several other birches occur.