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Silene acaulis (L.) Jacq.
Cushion-pink, Moss campion
USDA Symbol: SIAC
This popular rock garden plant makes tight, moss-like cushions of almost spiny, glossy leaves which seem to flow over the rocks. Long, woody taproots anchor the perennial deeply in rock crevices. In flower, pink to lavender, five-petaled blossoms dot the bright-green mat in profusion. Dwarf plant, forming dense tussocks, with solitary pink to violet flowers at the ends of leafy branches.
This beautiful little mountain-dwelling wildflower forms extensive moss-like carpets in the western mountains but appears only locally in the East, where Mt. Washington in New Hampshire is its southern limit.
Plant CharacteristicsDuration: Perennial Habit: Herb Leaf Complexity: Simple Fruit: Size Class:
Bloom InformationBloom Color: Pink , Purple
Bloom Time: Jun , Jul , Aug
, WY Canada: NS Native Distribution:
Circumpolar (var. exscapa), s. in N. America to OR, ID,
& NH; extending s. in the Rockies to NM
as var. subacaulescens Native Habitat:
Moist, chalky rock crevices in high mts.
Growing ConditionsLight Requirement: Sun
Soil Description: Rich, scree soil.
Conditions Comments: This is a trouble-free, rock garden plant.
BenefitConspicuous Flowers: yes
Can be propagated from stem
cuttings. Plants come easily from seed, and should be transplanted to the rockery when the rosettes get 1-2 in. across. Seed Collection:
Not Available Seed Treatment:
Not Available Commercially Avail:
National Wetland Indicator Status
This information is derived from the U.S. Army Corps of Engineers National Wetland Plant List, Version 3.1
(Lichvar, R.W. 2013. The National Wetland Plant List: 2013 wetland ratings. Phytoneuron 2013-49: 1-241). Click here
for map of regions.
Record Last Modified: 2007-01-01
Research By: TWC Staff