Dryas octopetala L.

Eightpetal mountain-avens (en), Dryade à huit pétales (fr), Herbe à plumets (fr), Chênette (fr), Thé des alpes (fr)

Species

Angiosperms > Rosales > Rosaceae > Dryas

Characteristics

Plants 2.5–12 cm. Leaf blades oblong or ovate to elliptic, 3–16 × 0.5–6.5 mm, base usually truncate or cordate, sometimes cuneate, margins ?flat?, coarsely dentate to serrate, sinuses 5–50(–65)% to midvein, apex acute to rounded, surfaces plicate along midvein, usually rugulose, sometimes rugose, ?midvein and lateral veins sunken?, abaxial tomentose to woolly, adaxial usually glabrous, rarely tomentose or sparsely hairy proximally on midvein, feathery hairs scattered to rare along midveins abaxially and on petioles, scattered to rare elsewhere, midveins and petiole apices usually abaxially stipitate-glandular. Peduncles 11–125 mm. Flowers erect at flowering; sepals linear-oblong, 4–7 × 1.5–2.5 mm; petals 8, spreading, white or cream, 9–14 × 5–9 mm; filaments glabrous. Achenes 2.5–3 mm; styles 16–32 mm.
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An evergreen mat forming shrub. It grows 8-10 cm high and spreads 100 cm wide. The leaves are shiny and oak shaped. They are white underneath. They turn bronze in winter. The flowers are fairly large and white. The flower stems are 10 cm long. They are in fluffy seed heads.
Life form perennial
Growth form shrub
Growth support free-standing
Foliage retention evergreen
Sexuality hermaphrodite
Pollination entomogamy
Spread anemochory
Mature width (meter) 0.75 - 1.0
Mature height (meter) 0.08 - 0.1
Root system fibrous-root
Rooting depth (meter) 0.3
Root diameter (meter) -
Flower color
Blooming months
JanFebMar
AprMayJun
JulAugSep
OctNovDec
Fruit color
Fruiting months -
Nitrogen fixer
Photosynthetic pathway c3

Environment

It is a cool temperate plant. It suits hardiness zones 3-9. It grows in the European Alps as well as in Arctic regions. It suits slightly alkaline, moist, well-drained soils. It grows in an open sunny position. It is resistant to frost but sensitive to drought.
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Rocky places and high pastures, especially on limestone rocks.
Light 5-8
Soil humidity 3-5
Soil texture 3-6
Soil acidity 3-8
Soil nutriment -
Hardiness (USDA) 2-7

Usage

The leaves are used for tea.
Uses environmental use medicinal tea
Edible leaves
Therapeutic use Callus (unspecified)
Human toxicity -
Animal toxicity -

Cultivation

Plants can be grown by division, cuttings or freshly sown seed.
Mode cuttings divisions seedlings
Germination duration (days) 50 - 180
Germination temperacture (C°) 10 - 13
Germination luminosity -
Germination treatment stratification
Minimum temperature (C°) -45
Optimum temperature (C°) -
Size -
Vigor -
Productivity -

Images

Habit

Dryas octopetala habit picture by Hromada Martin (cc-by-sa)
Dryas octopetala habit picture by Jani Zadrgal (cc-by-sa)
Dryas octopetala habit picture by Lennaert Steen (cc-by-sa)

Leaf

Dryas octopetala leaf picture by Marco Scalisi (cc-by-sa)
Dryas octopetala leaf picture by Christian Regg (cc-by-sa)
Dryas octopetala leaf picture by Béatrice Escande (cc-by-sa)

Flower

Dryas octopetala flower picture by lelapin (cc-by-sa)
Dryas octopetala flower picture by Marco Scalisi (cc-by-sa)
Dryas octopetala flower picture by nicolas duchene (cc-by-sa)

Fruit

Dryas octopetala fruit picture by André van der Graaff (cc-by-sa)
Dryas octopetala fruit picture by Hans Rudolf Oberholzer (cc-by-sa)
Dryas octopetala fruit picture by Laurent GUILLAUME (cc-by-sa)

Distribution

Dryas octopetala world distribution map, present in Albania, Andorra, Austria, Bulgaria, Bosnia and Herzegovina, Canada, Switzerland, China, Germany, Finland, France, United Kingdom of Great Britain and Northern Ireland, Georgia, Greece, Greenland, Croatia, Iceland, Italy, Liberia, Liechtenstein, North Macedonia, Montenegro, Mongolia, Norway, Poland, Romania, Russian Federation, Serbia, Slovakia, Slovenia, Sweden, Ukraine, United States of America, and South Africa

Identifiers

LSID urn:lsid:ipni.org:names:724675-1
WFO ID wfo-0000996365
COL ID 37TXV
BDTFX ID 23128
INPN ID 95461
Wikipedia (EN) Link
Wikipedia (FR) Link

Synonyms

Dryas x vagans Dryas babingtoniana Dryadaea octopetala Geum chamaedrifolium Ptilotum octopetalum Dryas eriopoda Dryas lepida Dryas montana Dryas pentaphyllaea Geum chamaedryfolium Dryas depressa Dryas subincisa Dryas punctata Dryas octopetala f. hirsuta Dryas octopetala f. lanata Dryas chamaedryoides Dryas lanata Geum octopetalum Dryas chamaedrifolioides Dryas octopetala f. octopetala Dryas chamaedrifolia Dryas alpina Dryas octopetala var. typica Dryas octopetala subsp. subincisa Dryas punctata subsp. punctata Dryas punctata var. cinerea Dryas octopetala var. pilosa Dryas subincisa var. minor Dryas octopetala subsp. octopetala Dryas octopetala var. octopetala Dryas octopetala subsp. punctata Dryas octopetala var. luteola Dryas octopetala var. viscida Dryas octopetala subsp. chamaedryfolia Dryas octopetala

Lower taxons

Dryas octopetala var. argentea Dryas octopetala subsp. alaskensis Dryas octopetala subsp. hookeriana Dryas octopetala var. asiatica