Atriplex patula L.

Spreading orache (en), Arroche étalée (fr)

Species

Angiosperms > Caryophyllales > Amaranthaceae > Atriplex

Characteristics

Much-branched, prostrate or widespreading to suberect, farinose, monoecious annual, often with erect main stem and stiff horizontal branches, sometimes mat-forming. Stems ribbed, ± slender. Petiole to 1.5 cm long; lamina 2-7 × 0.3-4 cm, mostly linear-lanceolate, lanceolate or elliptic, sometimes ovate and then often hastate, rarely lobed on 1 side only, otherwise lamina nearly always entire, green or grey-green; base narrow-cuneate to cuneate; apex acute to obtuse. Infl. lvs (even down to base of branches) smaller, narrower, with shorter petioles. Infl. long, spicate; fls in glomerules; upper glomerules sometimes subtended by small bract-like lvs. ♂ fls: perianth c. 0.5 mm long; segments green with hyaline margin. ♀ fls: bracteoles 1-1.5 mm long at anthesis, sessile, triangular or rhombic-triangular, often triangular-hastate, otherwise entire or with a few marginal or sometimes central dorsal teeth, sometimes with appendages. Fruiting bracteoles (1.5)-2.5-8.5-(11) × 1-5-(6) mm, sometimes unequal, thin, green or grey-farinose, the lower part united; apex acute or acuminate. Fr. enclosed or apex exserted from bracteoles, 1.4-2.2-(3.2) mm diam., circular, laterally flattened; pericarp easily removed. Testa shining black, almost smooth.
More
Plants to 1(–1.5) m, erect and widely branched, or sometimes ± prostrate; lvs green especially on the upper side, the principal ones 4–12 cm, lanceolate to rhombic-hastate with a cuneate base; infls numerous, interrupted-spiciform, more continuous upwards, leafy-bracteate only near the base; fruiting bracteoles thin, foliaceous, joined near the base or almost to the middle, obscurely veined or only the midvein prominent, mostly 3–7 mm, ovate to more often rhombic-triangular or triangular-hastate, acute to acuminate, entire or with 1 or 2 short lateral teeth, smooth or with irregular appendages on the back; seeds dimorphic, some brown, 2.5–3.5 mm wide, others black, smaller, 1.2–3 mm wide; radicle ± inferior; mainly or wholly tetraploid on x=9. Widespread ruderal weed, only casually maritime, intr. from Eurasia. (A. acadiensis)
An annual herb. It grows 30 cm to 1.5 m tall. The leaves are alternate. The leaves are sword shaped and 3-14 cm long. The lower leaves can be more broad with a wedge shaped base that tapers into a short leaf stalk. The upper leaves do not have a leaf stalk. The seeds are 1.2-1.5 mm across.
Sprawling, grey-mealy annual to 50 cm. Leaves lanceolate to rhomboid, coarsely toothed to lobed below, glabrescent above. Flowers clustered in elongate spikes, whitish; fruiting bracts rhomboid, often with small horns, to 2 mm long.
Life form annual
Growth form herb
Growth support free-standing
Foliage retention deciduous
Sexuality monoecy
Pollination
Spread -
Mature width (meter) -
Mature height (meter) 0.75 - 0.8
Root system -
Rooting depth (meter) -
Root diameter (meter) -
Flower color
Blooming months
JanFebMar
AprMayJun
JulAugSep
OctNovDec
Fruit color -
Fruiting months -
Nitrogen fixer -
Photosynthetic pathway c3

Environment

Waste and arable land near the coast, it is usually found on clays and heavy ground. Roadsides, waste ground, riverbanks, and weed-infested places generally.
More
It is a temperate plant. In Argentina it grows between sea level and 500 m above sea level. Tasmania Herbarium.
Light 6-9
Soil humidity 3-5
Soil texture 4-6
Soil acidity 3-9
Soil nutriment -
Hardiness (USDA) 4-9

Usage

The young leaves can be eaten raw in salads or cooked and eaten as a vegetable. They are used in soups. The seeds can be ground and cooked and eaten.
Uses medicinal poison
Edible leaves seeds
Therapeutic use Emmenagogue (unspecified), Hysteria (unspecified), Lung (unspecified)
Human toxicity -
Animal toxicity -

Cultivation

Plants can be grown by seed or cuttings.
Mode seedlings
Germination duration (days) 9 - 21
Germination temperacture (C°) 10 - 12
Germination luminosity -
Germination treatment -
Minimum temperature (C°) -
Optimum temperature (C°) -
Size -
Vigor -
Productivity -

Images

Habit

Atriplex patula habit picture by Eric Rebsamen (cc-by-sa)
Atriplex patula habit picture by Palmieri Nicola (cc-by-sa)
Atriplex patula habit picture by Palmieri Nicola (cc-by-sa)

Leaf

Atriplex patula leaf picture by Jeremy Thomas (cc-by-sa)
Atriplex patula leaf picture by Jeremy Thomas (cc-by-sa)
Atriplex patula leaf picture by Bruno Colas (cc-by-sa)

Flower

Atriplex patula flower picture by Deborah Wooller-Jones (cc-by-sa)
Atriplex patula flower picture by PS 114 (cc-by-sa)
Atriplex patula flower picture by PS 114 (cc-by-sa)

Fruit

Atriplex patula fruit picture by Felix Neumann (cc-by-sa)
Atriplex patula fruit picture by laurent carraro (cc-by-sa)
Atriplex patula fruit picture by Douglas Scofield (cc-by-sa)

Distribution

Atriplex patula world distribution map, present in Afghanistan, Albania, Argentina, Armenia, Australia, Austria, Azerbaijan, Belgium, Bulgaria, Bosnia and Herzegovina, Belarus, Canada, Switzerland, Chile, Czech Republic, Germany, Denmark, Algeria, Spain, Estonia, Finland, France, United Kingdom of Great Britain and Northern Ireland, Georgia, Gibraltar, Greece, Greenland, Croatia, Hungary, Iceland, Italy, Kazakhstan, Kyrgyzstan, Lebanon, Liberia, Liechtenstein, Lithuania, Luxembourg, Latvia, Morocco, North Macedonia, Malta, Montenegro, Netherlands, Norway, New Zealand, Poland, Korea (Democratic People's Republic of), Portugal, Romania, Russian Federation, Saudi Arabia, Saint Pierre and Miquelon, Serbia, Slovakia, Slovenia, Sweden, Syrian Arab Republic, Tajikistan, Tunisia, Turkey, Ukraine, Uruguay, United States of America, Uzbekistan, and South Africa

Identifiers

LSID urn:lsid:ipni.org:names:26419-2
WFO ID wfo-0000556421
COL ID JLLY
BDTFX ID 8426
INPN ID 152802
Wikipedia (EN) Link
Wikipedia (FR) Link

Synonyms

Atriplex recta Chenopodium angustifolium Atriplex agrestis Atriplex erecta Atriplex hastilifolia Atriplex nemorensis Chenopodium zosterifolium Atriplex procumbens Atriplex polymorpha Atriplex angustifolia Atriplex macrodira Atriplex virgata Atriplex amana Atriplex salina Atriplex hastata subsp. patula Atriplex patula subsp. producta Atriplex hastata var. patula Atriplex patula subsp. amana Atriplex patula var. angustifolia Atriplex oblongifolia var. patula Atriplex patula var. japonica Atriplex patula var. producta Atriplex patula var. patula Atriplex patula subsp. patula Atriplex patula

Lower taxons

Atriplex patula subsp. austroafricana Atriplex patula subsp. verreauxii