Flora of North America species comparison

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Diapensia lapponica

cushion-plant, diapensia, diapensie de laponie, Lapland pincushion plant, pincushion-plant
Habit Plants forming rounded tussocks, 3–8 cm; branches procumbent or decumbent to erect, not adventitiously rooted, proximal portions of stems densely covered by persistent leaf remnants.
Leaves

7–15 mm;

blade oblong-oblanceolate to narrowly spatulate, 1.3–2.3 mm wide, margins narrowly revolute, with narrow hyaline flange proximally.
Pedicels

5–20 mm, elongating to 40–50 mm.
Flowers

sepals 6–7 mm;

corolla 7–10 mm, lobes usually white, sometimes cream, light pink, or rose.
Capsules

3–4(–6) mm diam. 2n = 12.

Diapensia lapponica
Phenology Flowering May–Jun(-Aug).
Habitat Bare, rocky alpine summits, gravelly balds, cliff faces, rocky summits, ridges, slopes, fellfields
Elevation (10-)200-1900 m ((0-)700-6200 ft)
Distribution
from FNA
ME; NH; NY; VT; MB; NL; NS; NU; QC; SPM; Greenland; Europe (w Russian arctic and subarctic, Scandinavia, Scotland); Atlantic Islands (Iceland)
[WildflowerSearch map]
[BONAP county map]
Discussion

In New England and Newfoundland, flowering phenology of Diapensia lapponica is bimodal (R. T. Day and P. J. Scott 1981). In some populations, one group of plants flowers in May through June, and another group flowers in a nonoverlapping period from late June through late August. The genetic basis for this has not been determined (M. M. Grandtner 1978).

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 8, p. 338.
Parent taxa Diapensiaceae > Diapensia
Sibling taxa
D. obovata
Name authority Linnaeus: Sp. Pl. 1: 141. 1753 ,
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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