Petasites pyrenaicus (Loefl.) G.López

Héliotrope d'hiver (fr), Pétasite des Pyrénées (fr), Pétasite odorant (fr)

Species

Angiosperms > Asterales > Asteraceae > Petasites

Characteristics

Dioecious, rhizomatous herb to c. 0.4 m high, with glandular hairs on most parts. Basal leaves: petiole 10–30 cm long, sheathing basally; lamina suborbicular to reniform, 5–20 cm long, strongly cordate at base, crowded-denticulate. Stem leaves 2–7, c. 2–6 cm long, comprising a well-developed sheath and a small lamina reducing to vestigial upwards. Capitula several per stem; peduncle to c. 30 mm long at maturity; calycular bracteoles 2–6, ±linear, 3–8 mm long; involucre 7–12 mm long, c. 3–6 mm diam.; bracts c. 13; stereome flat. Male capitula (all Australian specimens): ligulate florets c. 12, female but sterile; ligule 4–6 mm long, 3–5-veined, white, sometimes tinged purplish; disc florets c. 20, bisexual but functionally male; corolla c. 8 mm long, c. 0.5 mm diam. at base; limb c. ⅖ of total length, white, with narrowly oblong lobes. Achenes obloid, 1.5–2.0 mm long. Pappus 4–8 mm long, white; bristles scabrid-barbellate.
Life form perennial
Growth form herb
Growth support -
Foliage retention deciduous
Sexuality dioecy
Pollination entomogamy
Spread anemochory
Mature width (meter) 1.0 - 1.5
Mature height (meter) 0.2 - 0.35
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

Grows in damp shady places such as roadside ditches.
Light 1-8
Soil humidity 3-7
Soil texture 1-4
Soil acidity 2-8
Soil nutriment -
Hardiness (USDA) 7-9

Usage

Uses environmental use medicinal poison
Edible -
Therapeutic use -
Human toxicity -
Animal toxicity -

Cultivation

Mode -
Germination duration (days) -
Germination temperacture (C°) -
Germination luminosity -
Germination treatment -
Minimum temperature (C°) -18
Optimum temperature (C°) -
Size -
Vigor -
Productivity -

Images

Habit

Petasites pyrenaicus habit picture by julie Doyhenard (cc-by-sa)
Petasites pyrenaicus habit picture by Marine Litou (cc-by-sa)
Petasites pyrenaicus habit picture by Jacques Zuber (cc-by-sa)

Leaf

Petasites pyrenaicus leaf picture by Suriya Edwards (cc-by-sa)
Petasites pyrenaicus leaf picture by Sylvain Gouttebroze (cc-by-sa)
Petasites pyrenaicus leaf picture by Florent Beck (cc-by-sa)

Flower

Petasites pyrenaicus flower picture by David Johnston (cc-by-sa)
Petasites pyrenaicus flower picture by rickterscale (cc-by-sa)
Petasites pyrenaicus flower picture by John Cole (cc-by-sa)

Distribution

Petasites pyrenaicus world distribution map, present in Australia, Belgium, Switzerland, Germany, Denmark, Algeria, Spain, France, United Kingdom of Great Britain and Northern Ireland, Greece, Italy, Libya, New Zealand, Portugal, and Tunisia

Identifiers

LSID urn:lsid:ipni.org:names:942865-1
WFO ID wfo-0000127875
COL ID 4FD29
BDTFX ID 48385
INPN ID 112790
Wikipedia (EN) Link
Wikipedia (FR) Link

Synonyms

Nardosmia fragrans Tussilago fragrans Tussilago racemosa Petasites fragrans Tussilago suaveolens Nardosmia denticulata Tussilago pyrenaica Cacalia alliariifolia Nardosmia racemosa Petasites pyrenaicus