Overview

Distribution

National Distribution

Canada

Origin: Native

Regularity: Regularly occurring

Currently: Present

Confidence: Confident

United States

Origin: Unknown/Undetermined

Regularity: Regularly occurring

Currently: Unknown/Undetermined

Confidence: Confident

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Yukon; Alaska.
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Physical Description

Morphology

Description

Trees , to 12 m; crowns narrow. Bark dark reddish brown, sometimes becoming pinkish or grayish white, smooth, in maturity exfoliating in thin sheets; lenticels dark, horizontally expanded. Twigs without taste and odor of wintergreen, slightly to moderately pubescent, often with scattered resinous glands. Leaf blade ovate to nearly deltate with 2--6 pairs of lateral veins, 4--5(--7.5) × 2.5--4.5 cm, base rounded to cuneate, margins coarsely doubly serrate to dentate, teeth relatively sharp, apex acute to short-acuminate; surfaces abaxially sparsely to moderately pubescent, especially along major veins and in vein axils, often with scattered resinous glands. Infructescences erect to nearly pendulous, cylindric, 2--5 × 0.5--1 cm, shattering with fruits in fall; scales ciliate, lobes diverging at middle, nearly equal in length, strongly divergent. Samaras with wings as broad as to somewhat narrower than body, broadest near middle, not extended beyond body apically. 2 n = 70.
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Diagnostic Description

Synonym

Betula kamtschatica (Regel) V. N. Vassiljev var. kenaica (W. H. Evans) C. A. Jansson; B. neoalaskana Sargent var. kenaica (W. H. Evans) B. Boivin; B. papyrifera Marshall var. kenaica (W. H. Evans) A. Henry
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Ecology

Habitat

Rocky slopes in the subalpine zone; 0--300m.
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Life History and Behavior

Cyclicity

Flowering/Fruiting

Flowering late spring.
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Molecular Biology and Genetics

Molecular Biology

Statistics of barcoding coverage: Betula kenaica

Barcode of Life Data Systems (BOLDS) Stats
Public Records: 2
Specimens with Barcodes: 2
Species With Barcodes: 1
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Conservation

Conservation Status

National NatureServe Conservation Status

Canada

Rounded National Status Rank: NNR - Unranked

United States

Rounded National Status Rank: NNR - Unranked

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NatureServe Conservation Status

Rounded Global Status Rank: T4 - Apparently Secure

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Wikipedia

Betula kenaica

Betula kenaica, Kenai Birch, is a species of birch that can be found in Alaska and northwestern North America on an elevation of 300 metres (980 ft) above sea level.[1]

Description[edit]

The species is 12 metres (39 ft) tall and have a reddish-brown bark that may become pink or grayish-white. Leaf bladed are ovate and grow in 2-6 pairs which are 4–5 centimetres (1.6–2.0 in) (sometimes up to 7.5 centimetres (3.0 in)) long and 2.5–4.5 centimetres (0.98–1.8 in) wide. It margins are cuneated and serrated with rounded base and acute apex. Flowers bloom in late spring while fruits fall in autumn.[2]

Uses[edit]

The buds and twigs of the plant are used as a stew flavor while its inner bark can be eaten either raw or cooked and can be used as soup thickener. The sap is used to make honey.[1]

References[edit]

  1. ^ a b "Betula kenaica". PFAF. Retrieved December 4, 2013. 
  2. ^ Betula kenaica 3. Flora of North America. 

Further reading[edit]


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Notes

Comments

The relationship of Betula kenaica to other white-barked birches is not well understood, although it and the following species are evidently closely allied to B . papyrifera , from which they have likely been derived. Betula kenaica differs from B . papyrifera primarily in its smaller stature and in its smaller, blunter-tipped, more coarsely and regularly serrate leaves. 

 Betula × hornei Butler (= Betula kenaica W. H. Evans × B . nana Linnaeus), variously intermediate between its parents, is common throughout the range of B . kenaica (which is mostly overlapped by that of B . nana ).

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