Lysimachia japonica Thunb.

Japanese yellow loosestrife (en)

Species

Angiosperms > Ericales > Primulaceae > Lysimachia

Characteristics

Herbs perennial. Stems prostrate to decumbent, 7--15(--30) cm, usually branched from base, with grayish multicellular hairs. Leaves opposite; petiole 2--5(--10) mm, narrowly winged; leaf blade broadly ovate to suborbicular, 1--2.5 X 0.7--2 cm, pubescent, transparent glandular punctate, base rounded to subtruncate, apex acute to obtuse; veins 2 or 3 pairs; veinlets inconspicuous. Pedicel recurved in fruit, 3--8 mm. Flowers solitary, axillary. Calyx lobes lanceolate, 3--4 mm, enlarging to 7--8 mm in fruit, pubescent. Corolla yellow, deeply parted, ca. as long as calyx, 5--8 mm in diam.; lobes triangular-ovate, transparent glandular punctate. Filaments connate basally into a ca. 1 mm high ring, free parts 1--2 mm; anthers ovate, dorsifixed, opening by lateral slits, ca. 1 mm. Ovary pubescent; style 2--3 mm. Capsule subglobose, 3--4 mm in diam., pubescent at apex. Fl. Mar-Apr. 2n = 18, 20, 22.
More
Stems prostrate to ascending, simple or branched proximally, 1-3 dm, pubescent; rhizomes very slender; bulblets absent. Leaves opposite or sometimes alternate near apex of stem; petiole 0.5-1.5 cm, pubescent; blade orbiculate to ovate or deltate, 1.5-4 × 0.7-2 cm, base rounded to truncate, slightly decurrent, margins entire, plane, pubescent, apex acute to obtuse, surfaces punctate, sparsely pubescent; venation pinnate-arcuate. Inflorescences axillary in distal leaves, solitary flowers. Pedicels 0.2-0.8 cm, pubescent. Flowers: sepals 5, calyx not streaked, 5-9 mm, pubescent, lobes narrowly lanceolate, margins thin; petals 5, corolla yellow, not streaked, rotate, 5-9 mm, lobes with margins entire, apex acute to rounded, stipitate-glandular; filaments connate, shorter than corolla; staminodes absent. Capsules 2.5-3 mm, not punctate, pubescent distally. 2n = 18, 20, 22 (all Asian).
A slender, little branched herb which lies on the ground. The stem is angular and brown hairy. The plant is 5-10 cm long and the leaves are 4-7 mm by 3-5 mm. The leaves occur opposite one another. Flowers are singly in the axils of leaves. They droop.
Life form perennial
Growth form herb
Growth support free-standing
Foliage retention -
Sexuality hermaphrodite
Pollination -
Spread -
Mature width (meter) 0.1 - 0.5
Mature height (meter) 0.0
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 -

Environment

A tropical and subtropical plant. Plants occur between the altitudes of 1050 m and 2900 m. in Papua New Guinea. They occur on damp banks along roadsides or in abandoned fields. In China they occur on grassy banks, ditches, and streamsides between 500-800 m.
Light 4-6
Soil humidity 7-9
Soil texture -
Soil acidity 2-8
Soil nutriment -
Hardiness (USDA) 7-10

Usage

The leaves have been reported as eaten.
Uses food medicinal
Edible leaves
Therapeutic use Eye (unspecified)
Human toxicity -
Animal toxicity -

Cultivation

Plants grow wild from seed.
Mode divisions seedlings
Germination duration (days) 30 - 90
Germination temperacture (C°) 12 - 18
Germination luminosity -
Germination treatment -
Minimum temperature (C°) -
Optimum temperature (C°) -
Size -
Vigor -
Productivity -

Images

Lysimachia japonica unspecified picture

Distribution

Lysimachia japonica world distribution map, present in China, Pakistan, and United States of America

Identifiers

LSID urn:lsid:ipni.org:names:701180-1
WFO ID wfo-0000442847
COL ID 73322
BDTFX ID -
INPN ID -
Wikipedia (EN)
Wikipedia (FR)

Synonyms

Lysimachia maculata Lysimachia japonica Lysimachia minutissima Lysimachia uliginosa Anagallis pilosa

Lower taxons

Lysimachia japonica subsp. papuana