Drosera rotundifolia L.

Roundleaf sundew (en), Rossolis à feuilles rondes (fr)

Species

Angiosperms > Caryophyllales > Droseraceae > Drosera

Characteristics

Herbs perennial, with few fibrous roots. Stem unbranched, short, sometimes to 5 cm when growing in Sphagnum moss, forming a bulb at shoot tip during winter, not forming a tuber below ground. Leaves basal, dense, long petiolate; stipule 5-7-fid, 6-8 mm, scarious, closely adnate to petiole at base; petiole flat, 1-7 cm; leaf blades yellowish green or green to red, orbicular, suborbicular, or weakly reniform, 3-10 mm × 0.5-2 cm, with red, long capitate, sticky, glandular hairs. Inflorescences erect, scapiform, slender, 8.5-30 cm, glabrous; cincinni 1 or 2, 3-30-flowered; bracts subulate to linear, small; pedicels 1-3 mm. Sepals 5, united near base, green, ovate to oblong, ca. 4 × 1.5 mm, glandular, margin serrate. Petals white or tinged with pink, spatulate, 5-6 × ca. 3 mm. Stamens 5, 4-5 mm. Ovary ellipsoid-globose, ca. 3 mm; placentas 3; styles 3 or 4, deeply parted to base or entire, clavate; stigma simple. Capsule 3-or 4-valved. Seeds ellipsoid-globose; testa pouch-shaped, extended at each end. 2n = 20.
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Plants forming winter hibernaculae, rosettes (2–)4–10(–15) cm diam.; stem base not bulbous-cormose. Leaves erect to prostrate; stipules adnate to petioles their entire length, 4–6 mm, margins fimbriate along distal 1/2; petiole differentiated from blade, 1.5–5 cm, glandular-pilose; blade suborbiculate, 0.4–1 cm × 5–12 mm, <broader than long, much shorter than petiole>. Inflorescences 2–15(–25)-flowered; scapes 5–35 cm, glabrous. Flowers 4–7 mm diam.; sepals connate basally, oblong, 4–5 × 1.5–2 mm, glabrous; petals white or pink, spatulate, 5–6 × 3 mm. Capsules 5 mm. Seeds light brown, fusiform, 1–1.5 mm, finely and regularly longitudinally striate, <with metallic sheen>. 2n = 20.
Petioles 1.5–5 cm, flat, glandular-hairy; lf-blades 4–10 mm, broader than long, much shorter than the petiole; stipules 4–6 mm, adnate, fimbriate along the upper half, scape glabrous, 7–35 cm, with 3–15 fls 4–7 mm wide; sep 4–5 mm; pet white to pink, spatulate, longer than the sep; seeds light brown, lustrous, 1–1.5 mm, sigmoid-fusiform, finely and regularly striate longitudinally; 2n=20. Common in bogs and swamps; circumboreal, in Amer. s. to S.C., Ga., Tenn., Ill., and Calif. June–Sept.
A small herb. It forms rings or leaves. It can be an annual or keep growing from year to year. It grows 5-10 cm high and spreads 10 cm wide. The leaves are cup shaped and on fine stalks. The flowers are very small and white or pink. They have 5 petals. They are on a leafless stalk. The fruit are capsules of winged seeds.
Life form perennial
Growth form herb
Growth support -
Foliage retention evergreen
Sexuality hermaphrodite
Pollination autogamy
Spread anemochory
Mature width (meter) 0.1
Mature height (meter) 0.06 - 0.1
Root system fibrous-root
Rooting depth (meter) -
Root diameter (meter) -
Flower color
Blooming months
JanFebMar
AprMayJun
JulAugSep
OctNovDec
Fruit color -
Fruiting months -
Nitrogen fixer -
Photosynthetic pathway c3

Environment

A temperate plant. It mostly grows on sphagnum moss. It needs wet peat in the sun. It is frost hardy. It suits hardiness zones 3-9.
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Wet and moist places in poor peaty soils, occasionally forming a floating fringe on small ponds.
Light 6-9
Soil humidity 6-9
Soil texture 1-6
Soil acidity 2-6
Soil nutriment -
Hardiness (USDA) 5-8

Usage

The leaves are used to distill a liquor. It is mixed with brandy, raisins and sugar and fermented. The juice from the leaves is used to curdle milk.
Uses environmental use medicinal
Edible leaves
Therapeutic use Dermatological Aid (unspecified), Love Medicine (unspecified), Astringent (unspecified), Bronchitis (unspecified), Bunion (unspecified), Cancer (unspecified), Corn (unspecified), Diuretic (unspecified), Philter (unspecified), Sedative (unspecified), Spasm (unspecified), Sudorific (unspecified), Wart (unspecified), Antitussive (unspecified), Demulcent (unspecified), Pertussis (unspecified), Asthma (unspecified), Inflammation (unspecified), Pectoral (unspecified), Expectorant (unspecified)
Human toxicity -
Animal toxicity -

Cultivation

Plants can be grown from seed. Leaf cuttings can be used. Plants can also be grown from root cuttings.
Mode cuttings divisions seedlings
Germination duration (days) 19 - 52
Germination temperacture (C°) 12 - 18
Germination luminosity light
Germination treatment -
Minimum temperature (C°) -23
Optimum temperature (C°) -
Size -
Vigor -
Productivity -

Images

Habit

Drosera rotundifolia habit picture by Nicolas Lagarrigue (cc-by-sa)
Drosera rotundifolia habit picture by Llandrich anna (cc-by-sa)
Drosera rotundifolia habit picture by Rossen Vassilev (cc-by-sa)

Leaf

Drosera rotundifolia leaf picture by Emanuele Pedretti Magli (cc-by-sa)
Drosera rotundifolia leaf picture by Emanuele Pedretti Magli (cc-by-sa)
Drosera rotundifolia leaf picture by Joël Langlais (cc-by-sa)

Flower

Drosera rotundifolia flower picture by alex boi (cc-by-sa)
Drosera rotundifolia flower picture by Riddler Tom (cc-by-sa)
Drosera rotundifolia flower picture by Anton Heuven (cc-by-sa)

Fruit

Drosera rotundifolia fruit picture by Pierre LEON (cc-by-sa)

Distribution

Drosera rotundifolia world distribution map, present in Austria, Belgium, Bosnia and Herzegovina, Belarus, Canada, Switzerland, China, Cameroon, Czech Republic, Germany, Denmark, Spain, Estonia, Finland, France, United Kingdom of Great Britain and Northern Ireland, Georgia, Greenland, Croatia, Hungary, Iceland, Israel, Japan, Liberia, Liechtenstein, Lithuania, Latvia, Monaco, Moldova (Republic of), North Macedonia, Montenegro, Mongolia, Netherlands, Norway, Papua New Guinea, Poland, Korea (Democratic People's Republic of), Portugal, Romania, Russian Federation, Saint Pierre and Miquelon, Serbia, Slovakia, Slovenia, Sweden, Ukraine, and United States of America

Conservation status

Drosera rotundifolia threat status: Least Concern

Identifiers

LSID urn:lsid:ipni.org:names:321960-1
WFO ID wfo-0000946157
COL ID 37QVY
BDTFX ID 23111
INPN ID 95442
Wikipedia (EN) Link
Wikipedia (FR) Link

Synonyms

Rossolis septentrionalis Drosera rotundifolia f. comosa Drosera corsica Drosera septentrionalis Drosera rotundifolia f. rotundifolia Rorella rotundifolia Rossolis rotundifolia Drosera rotundifolia var. capillaris Drosera rotundifolia var. distachya Drosera rotundifolia var. breviscapa Drosera rotundifolia var. comosa Drosera rotundifolia var. corsica Drosera rotundifolia var. furcata Drosera rotundifolia var. gracilis Drosera rotundifolia var. longipetiolata Drosera rotundifolia var. maritima Drosera rotundifolia subsp. rotundifolia Drosera rotundifolia var. rotundifolia Drosera rotundifolia