Symphytum tuberosum L.

Tuberous comfrey (en), Consoude tubéreuse (fr), Consoude à tubercules (fr)

Species

Angiosperms > Boraginales > Boraginaceae > Symphytum

Characteristics

A herb. It grows 45-60 cm high and spreads 90-100 cm wide. It forms tubers and keeps growing from year to year. The stems are hairy. The leaves are 25 cm long. The flowers are pale yellow and droop. Long green sepals cover half of the flower.
Life form perennial
Growth form herb
Growth support free-standing
Foliage retention deciduous
Sexuality hermaphrodite
Pollination entomogamy
Spread epizoochory
Mature width (meter) 0.6 - 1.0
Mature height (meter) 0.5 - 0.6
Root system rhizome
Rooting depth (meter) -
Root diameter (meter) -
Flower color
Blooming months
JanFebMar
AprMayJun
JulAugSep
OctNovDec
Fruit color -
Fruiting months -
Nitrogen fixer -
Photosynthetic pathway c3

Environment

It is a temperate plant. It suits hardiness zones 5-10.
More
Woods, scrub and by rivers.
Light 4-9
Soil humidity 4-6
Soil texture 1-6
Soil acidity 3-8
Soil nutriment -
Hardiness (USDA) 5-8

Usage

The leaves are used in vegetable soups. The roots are roasted then ground and used as a coffee substitute.
Uses coffee substitute environmental use medicinal wood
Edible leaves roots
Therapeutic use Tumor (unspecified)
Human toxicity weak toxic (whole)
Animal toxicity weak toxic (whole)

Cultivation

Can be grown by cuttings, divisions or seedlings.
Mode cuttings divisions seedlings
Germination duration (days) 14 - 28
Germination temperacture (C°) 20
Germination luminosity -
Germination treatment -
Minimum temperature (C°) -
Optimum temperature (C°) -
Size -
Vigor -
Productivity -

Images

Habit

Symphytum tuberosum habit picture by Gradwohl Markus (cc-by-sa)
Symphytum tuberosum habit picture by Patrice Nodet (cc-by-sa)
Symphytum tuberosum habit picture by bernard fabier (cc-by-sa)

Leaf

Symphytum tuberosum leaf picture by Sylwia Bochenko (cc-by-sa)
Symphytum tuberosum leaf picture by Pincé Xavier (cc-by-sa)
Symphytum tuberosum leaf picture by Jenny Gobert (cc-by-sa)

Flower

Symphytum tuberosum flower picture by lenique marc olivier (cc-by-sa)
Symphytum tuberosum flower picture by Miren Erroteta (cc-by-sa)
Symphytum tuberosum flower picture by reboul_1 (cc-by-sa)

Fruit

Symphytum tuberosum fruit picture by alain giroux (cc-by-sa)
Symphytum tuberosum fruit picture by François MICHIELS (cc-by-sa)
Symphytum tuberosum fruit picture by jose s (cc-by-sa)

Distribution

Symphytum tuberosum world distribution map, present in France, United Kingdom of Great Britain and Northern Ireland, and United States of America

Identifiers

LSID urn:lsid:ipni.org:names:120840-1
WFO ID wfo-0000432225
COL ID 53QGV
BDTFX ID 75403
INPN ID 125364
Wikipedia (EN) Link
Wikipedia (FR) Link

Synonyms

Symphytum leonhardtianum Symphytum mediterraneum Symphytum minus Symphytum tuberosum

Lower taxons

Symphytum tuberosum subsp. nodosum