Ixeris japonica Nakai

Species

Angiosperms > Asterales > Asteraceae > Ixeris

Characteristics

Herbs 15-35 cm tall, perennial, glabrous, rosulate. Taproot with lateral shoot-bearing roots producing secondary leaf rosettes. Stems several, flagelliform, long creeping above ground; nodes 1 to several cm apart, most with adventitious roots and a single leaf. Flowering stems from rosettes and leaf axils of creeping stems, erect, to 35 cm, with 0 or 1 leaf. Basal leaves present at anthesis, spatulate, elliptic, or almost linear, 3-25(-35) × 0.5-2(-3) cm, undivided or pinnatifid to pinnatipartite and sometimes lyrately so, base attenuate into a petiole-like portion, margin entire or sinuate-dentate, apex obtuse to acute and mucronulate; lateral lobes (if present) 1 to few pairs, triangular to elliptic, apex acute to obtuse. Stem leaves (if any) similar to basal leaves but smaller. Synflorescence laxly and weakly corymbiform, with 1-6 capitula. Capitula with 20-25 florets; peduncle wiry, 1-20 cm. Involucre cylindric to campanulate, (8-)10-12 × 4-5 mm at anthesis, to 1.4 cm in fruit. Phyllaries abaxially glabrous; outer phyllaries ovate to lanceolate, longest to 4 mm, apex acute; inner phyllaries 8, apex acute. Florets yellow, anther tube and style greenish to blackish upon drying. Achene brown, fusiform, 6-8 mm, apex attenuate into a filiform 2-3 mm beak. Pappus 6-8 mm. Fl. and fr. Mar-May. 2n = 48.
More
A herb. It keeps growing from year to year. It grows 15-35 cm tall. It has a taproot and leaves in a ring. The stems are long and creeping. These form roots at the nodes. The leaves are spoon shaped or narrow and 3-25 cm long by 1-2 cm wide. They can be divided and there can be teeth along the edge.
Life form perennial
Growth form herb
Growth support -
Foliage retention -
Sexuality hermaphrodite
Pollination entomogamy
Spread -
Mature width (meter) 0.5
Mature height (meter) 0.2
Root system adventitious-root creeping-root tap-root
Rooting depth (meter) -
Root diameter (meter) -
Flower color -
Blooming months -
Fruit color -
Fruiting months
JanFebMar
AprMayJun
JulAugSep
OctNovDec
Nitrogen fixer -
Photosynthetic pathway -

Environment

Cultivated fields and waste ground in lowlands all over Japan. Moist areas along roads, fields; below 400--500 metres in China.
More
It is a subtropical plant. It grows on sandy seashores in lowlands up to about 500 m above sea level.
Light 4-9
Soil humidity 4-6
Soil texture 2-6
Soil acidity 3-7
Soil nutriment -
Hardiness (USDA) 5-11

Usage

The roots are cooked and eaten.
Uses medicinal
Edible leaves roots shoots
Therapeutic use -
Human toxicity -
Animal toxicity -

Cultivation

Can be grown by seedlings.
Mode seedlings
Germination duration (days) -
Germination temperacture (C°) -
Germination luminosity -
Germination treatment -
Minimum temperature (C°) -
Optimum temperature (C°) -
Size -
Vigor -
Productivity -

Images

Ixeris japonica unspecified picture

Distribution

Ixeris japonica world distribution map, present in China, Japan, Korea (Democratic People's Republic of), Taiwan, Province of China, and Viet Nam

Identifiers

LSID urn:lsid:ipni.org:names:226387-1
WFO ID wfo-0000007447
COL ID 3QFGP
BDTFX ID -
INPN ID -
Wikipedia (EN)
Wikipedia (FR)

Synonyms

Lactuca debilis f. debilis Lactuca debilis Chondrilla debilis Ixeris debilis Lapsana japonica Barkhausia repens Lactuca trifida Ixeris litoralis Prenanthes debilis Youngia debilis Ixeris dentata f. leucantha Ixeris japonica f. integra Lactuca debilis Prenanthes debilis Ixeris japonica f. japonica Ixeris japonica f. sinuata Ixeris debilis f. sinuata Ixeris japonica var. japonica Ixeris japonica subsp. japonica Lactuca debilis var. debilis Ixeris japonica var. litoralis Ixeris debilis subsp. debilis Lactuca debilis var. integra Lactuca debilis f. sinuata Ixeris japonica f. dissecta Ixeris dentata f. leucantha Ixeris japonica

Lower taxons

Ixeris debilis subsp. litoralis