Specimens of Betula alleghaniensis and Betula lenta growing from century-old stumps

Reif, C.B.

Journal of the Pennsylvania Academy of Science 66(3): 116-122

1992


ISSN/ISBN: 1044-6753
Accession: 009443858

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Abstract
Within the 12-ha study area along the NW shore of Bear Lake, in Lackawanna County, PA, 19 non-birch stumps were observed, 16 of which had associated yellow birch trees (Betula alleghaniensis) and/or black birch (B. lenta) perched upon or growing from them. One stump had 1 yellow birch, 1 black birch, and 1 red spruce (Picea rubens). One stump had 1 shadbush (Amelanchier laevis). Of the 19 stumps, one stump had 3 grey birches (B. populifolia). Questions arose as to how, when and under what circumstances did the birch trees become associated with the stumps. From the evidence presented it was concluded that following successful germination in the nutritionally receptive decaying stump material, the saplings extended roots downward within the peripheral parts of the stumps and later were exposed. The stumps, cut in 1870 and not receptive until about 1930, had been until 1930, lightly shaded by mountain laurels (Kalmia latifolia) and highbush blueberries (Vaccinium corymbosum).