Flora of the Canadian Arctic Archipelago

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S.G. Aiken, M.J. Dallwitz, L.L. Consaul, C.L. McJannet, R.L. Boles, G.W. Argus, J.M. Gillett, P.J. Scott, R. Elven, M.C. LeBlanc, L.J. Gillespie, A.K. Brysting, H. Solstad, and J.G. Harris

Potentilla tridentata Sol.

Rosaceae, Rose family.

Published in In Aiton, Hort. Kew. 1: 216. 1789.

Vegetative morphology. Taproot present. Caudex present. Leaves mainly basal; alternate; dying annually and non-persistent, or marcescent. Stipules present. Leaf blades compound.

Reproductive morphology. Flowering stems two or more per plant. Sepals conventional. Epicalyx present. Sepals free. Petals conventional; free; 5; slightly lobed or undulating. Stamens 20–30. Ovary superior; apocarpous. Ovules per ovary 1. Fruit with calyx persisting; dry; an aggregate of achenes; indehiscent.

North American distribution. Continental Northwest Territories, northern Quebec, Labrador.

Northern hemisphere distribution. North American (Atlantic American. East, West, and South Greenland, Labrador to Lake Athabasca, in the east south to Newfoundland and further south in the mountains to N. Carolina and Georgia; also found in the Great Lakes region, Connecticut to Iowa and North Dakota; in the west, Alberta to North Dakota). Labrador – Hudson Bay, West Greenland, East Greenland.

General notes. Porsild (1957) described this as a dwarf shrub with sub-ligneous creeping stems, leathery, evergreen trifoliate leaves with three teeth at the apex of each leaflet, and small white flowers in open cymes. It is found in dry, rocky, gravelly, or shady places on Precambrian rock.

Reports of this species in the Canadian Arctic Archipelago were noted by Polunin (1940), but they were dismissed by him because he found no records supporting the occurrence of this taxon in the Arctic Archipelago.


This publication is available on the internet (posted May 2011) and on CD-ROM (published in 2007). These versions are identical in content, except that the errata page for CD-ROM is accessible on the main index page of the web version.

Recommended citation for the web-based version of this publication: Aiken, S.G., Dallwitz, M.J., Consaul, L.L., McJannet, C.L., Boles, R.L., Argus, G.W., Gillett, J.M., Scott, P.J., Elven, R., LeBlanc, M.C., Gillespie, L.J., Brysting, A.K., Solstad, H., and Harris, J.G. 2007. Flora of the Canadian Arctic Archipelago: Descriptions, Illustrations, Identification, and Information Retrieval. NRC Research Press, National Research Council of Canada, Ottawa. http://nature.ca/aaflora/data, accessed on DATE.

Recommended citation for the CD-ROM version of this publication: Aiken, S.G., Dallwitz, M.J., Consaul, L.L., McJannet, C.L., Boles, R.L., Argus, G.W., Gillett, J.M., Scott, P.J., Elven, R., LeBlanc, M.C., Gillespie, L.J., Brysting, A.K., Solstad, H., and Harris, J.G. 2007. Flora of the Canadian Arctic Archipelago: Descriptions, Illustrations, Identification, and Information Retrieval. [CD-ROM] NRC Research Press, National Research Council of Canada, Ottawa.

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