Dryas integrifolia
Vahl
Entireleaf Mountain-avens
Identity
Unique IDELEMENT_GLOBAL.2.161453
Element CodePDROS0L020
Record TypeSPECIES
ClassificationSpecies
Classification StatusStandard
Name CategoryVascular Plant
Endemicoccurs (regularly, as a native taxon) in multiple nations
KingdomPlantae
PhylumAnthophyta
ClassDicotyledoneae
OrderRosales
FamilyRosaceae
GenusDryas
Other Common NamesDryade à feuilles entières (FR) entireleaf mountain-avens (EN) Entire-leaved Mountain Avens (EN) Northern White Mountain Avens (EN) White Mountain-avens (EN)
Concept ReferenceKartesz, J.T. 1994. A synonymized checklist of the vascular flora of the United States, Canada, and Greenland. 2nd edition. 2 vols. Timber Press, Portland, OR.
Taxonomic CommentsFNA (vol. 9, 2014) includes D. integrifolia ssp. chamissonis in D. integrifolia ssp. integrifolia, while Kartesz (1994) here treats them as distinct. FNA also narrows the concept of D. integrifolia by says that D. integrifolia ssp. crenulata (= D. crenulata) is of eastern Siberia.
Conservation Status
Rank MethodExpertise without calculation
Review Date2015-06-23
Change Date1988-12-16
Range Extent20,000-2,500,000 square km (about 8000-1,000,000 square miles)
Rank ReasonsWidespread and common North American arctic/alpine species, with thousands of occurrences.
Range Extent CommentsArctic North America and Greenland, south to New Hampshire, British Columbia, Alberta, and northern Montana. Peripheral.
Ecology & Habitat
Description
Entire-leaved Avens is a mat-forming shrub with prostrate stems which bear naked flower stems that reach up to 10 cm high and arise from leaf rosettes. The leaves have short stalks and lance-shaped blades that are 8-15 mm long with margins that are turned under and entire on the upper half. The upper leaf surface is glabrous, while the lower surface is densely covered with white hair, but glands are absent. The solitary, saucer-shaped, white flowers have a glandular, 5-lobbed calyx and 8-10 spreading, elliptic petals that are ca. 1 cm long. There are numerous stamens and styles. The latter become feathery and 2-4 cm long as the achenes mature.
Diagnostic Characteristics
The more common D. OCTOPETALA VAR. HOOKERIANA is similar, but the leaves have wavy margins to the tip, are broadest near mid-length, and have light brown glands mixed in with the white hair on the undersides of the leaves.
Habitat
On gravel and rocky slopes in lowland and alpine tundra.
Other Nations (2)
United StatesN5
| Province | Rank | Native |
|---|
| Alaska | S5 | Yes |
| Montana | S2 | Yes |
CanadaNNR
| Province | Rank | Native |
|---|
| Labrador | S3 | Yes |
| Ontario | S4 | Yes |
| Northwest Territories | SNR | Yes |
| Yukon Territory | SNR | Yes |
| Manitoba | SNR | Yes |
| Island of Newfoundland | S4 | Yes |
| Quebec | SNR | Yes |
| British Columbia | S5 | Yes |
| Alberta | S4 | Yes |
| Nunavut | SNR | Yes |
| New Brunswick | SNR | Yes |
References (2)
- Bamberg, S. A. 1964. Ecology of the vegetation and soils associated with calcareous parent material in the alpine region of Montana. Unpublished dissertation, University of California, Davis. 106 pp. (Dissertation Abstract 25:4370).
- Kartesz, J.T. 1994. A synonymized checklist of the vascular flora of the United States, Canada, and Greenland. 2nd edition. 2 vols. Timber Press, Portland, OR.