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Home » Plant infomation

Alnus rubra  Bong.


Botanical Name


Alnus rubra Bong.

English Name


Red alder



Alnus oregona (Nutt.)





General Info


Trees, to 28 m; trunks often several, crowns narrow or pyramidal. Bark gray, smooth, darkening and breaking into shallow rectangular plates in age; lenticels inconspicuous. Winter buds stipitate, ellipsoid, 6-10 mm, apex rounded, long; stalks 2-8 mm; scales 2-3, outer 2 equal and valvate, usually heavily resin-coated. Leaf blade ovate to elliptic, 6-16 × 3-11 cm, leathery, base broadly cuneate to rounded, margins strongly revolute, deeply doubly serrate or crenate, with distinctly larger secondary teeth, apex acute to obtuse; surfaces abaxially glabrous to sparsely pubescent. Inflorescences formed season before flowering and exposed during winter; staminate catkins in 1 or more clusters of 2-6, 3.5-14 cm; sistillate catkins in 1 or more clusters of 3-8. Flowering before new growth in spring. Infructescences ovoid to nearly globose, 1-3.5 × 0.6-1.5 cm; peduncles 1-10 mm. Samaras ovate or elliptic, wings much narrower than body, irregularly elliptic to obovate, leathery.

Herb Effects

Appetizer, astringent, cathartic, cytostatic, emetic, stomachic and tonic (bark)


Plants for a Future


Active Ingredients

Betulin (stem bark)

Chemistry of Active Ingredients
Product Categories






Product Categories
Betulin Not Available Not Available C30H50O2 Click Here To Enlarge


Medicinal Use

In the treatment of many complaints such as headaches, rheumatic pains, internal injuries, diarrhoea, to eczema, sores and aches (bark); for diarrhoea (catkins and young cones)



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