Stolons usually appressed ascending-hairy, sometimes almost glabrous. Leaves: petiole usually appressed-ascending-hairy, sometimes almost glabrous; leaflet blade dark green to bluish green, glaucous, terminal leaflets usually oblong-ovate to cuneate, sometimes roundish, not leathery, margins sharply serrate throughout, teeth: relative number 0.1–0.5. Peduncles and pedicels usually appressed ascending-hairy, sometimes almost glabrous. Flowers 11.5–17.7 mm diam. (pistillate), 16–25.5 mm diam. (bisexual and staminate). Fruits: bractlets clasping, spreading, or ± reflexed. 2n = 56.

Phenology: Flowering spring and fall.
Habitat: Moist to dry sites, open forests, forest edges, hedges, fields, roadsides, railroad embankments, often ruderal
Elevation: 0–3400 m

Distribution

• Generated Map
• Legacy Map

Alta., B.C., Man., N.B., Nfld. and Labr., N.W.T., N.S., Nunavut, Ont., P.E.I., Que., Sask., Yukon, Alaska, Ariz., Calif., Colo., Idaho, Iowa, Maine, Mass., Minn., Mont., N.H., N.Mex., N.Y., N.Dak., R.I., S.Dak., Utah, Vt., Wis., Wyo.

Discussion

It is assumed that after the maximum glaciation, recolonization of most glaciated areas by subsp. glauca spread from the Alaska-Yukon refugium eastward to Hudson Bay, Newfoundland, and the New England states and, perhaps from a putative Rocky Mountains refuge northward to the Yukon and eastward to the Great Lakes area (G. Staudt 1999).

Selected References

None.

Lower Taxa

None.