Flora of North America species comparison

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Kalmia angustifolia var. angustifolia
Photo is of parent taxon

sheepkill
Leaf

blades pale green abaxially, bright green adaxially, glabrous or with scattered, stipitate-glandular trichomes abaxially, usually not puberulent.
Flowers

calyx puberulent and densely stipitate-glandular;

corolla glabrous or slightly puberulent adaxially.

Kalmia angustifolia var. angustifolia
Phenology Flowering May–Jul.
Habitat Open bogs, swamps, wet areas
Elevation 0-800 m (0-2600 ft)
Distribution
from FNA
CT; DE; MA; MD; ME; MI; NC; NH; NJ; NY; PA; RI; VA; VT; WV; NB; NF; NS; ON; PE; QC [Introduced in n Europe]
Discussion

Variety angustifolia is well known as a weed in plantations of commercial shrubs such as blueberries and of timber trees. It is difficult and sometimes costly to control in the blueberry fields and it is on the Canadian weed list (I. V. Hall et al. 1973; A. A. Ismail and D. E. Yarborough 1981). Variety angustifolia has allelopathic effects on black spruce (Picea mariana) seedlings, and has a competitive advantage over them. It may have the same effects on balsam fir (Abies balsamea) or at least play a role in reducing the growth of that tree (A. U. Mallik 1987, 1993; Mallik and P. F. Newton 1988; E. B. Peterson 1965; I. D. Thompson and Mallik 1989; H. Zhu and Mallik 1994).

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 8, p. 482.
Parent taxa Ericaceae > subfam. Ericoideae > Kalmia > Kalmia angustifolia
Sibling taxa
K. angustifolia var. carolina
Name authority unknown
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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