Prunus pensylvanica L.f.

		John W. Thieret
July Z	1959	Robert J. Reich
4940« Primus pensylvanica L*t•
petals white» shrub to 6 feet, stems to 3/4 inch*
local at edge of limestone escarpment above highway at
mile 25* few small jack pines and trembling aspen*
shallow residual soil in spots, otherwise bare rock*
main ground cover plants are Arctostaphylos uva-
ursi, Cladonia, Saxifrage tricuspidate, shrubs:
Juniperus spp*# fiosa, Shepherdia, Prunus Virginians«
specimens prepared by the formaldehyde method (see Rhodora 49: 54-60. 1947)
CHICAGO NATURAL HISTORY MUSEUM
VEGETATION SURVEY ALONG
THE ENTERPRISE-MACKENZIE
RIVER HIGHWAY, N. W. T.,
CANADA
02850406