Amaranthus pumilus Raf.

Seaside amaranth (en)

Species

Angiosperms > Caryophyllales > Amaranthaceae > Amaranthus

Characteristics

Plants annual, glabrous. Stems prostrate to ascending (often forming mats), red, much-branched, 0.1-0.4(-0.5) m, fleshy. Leaves clustered near tips of branches; petiole 5-10 mm; blade orbiculate, broadly ovate or obovate, 1-1.5 cm × 1-1.5 cm, fleshy, base broadly cuneate to tapering, margin entire, plane or slightly undulate, apex broadly rounded to obtuse, mucronate. Inflorescences dense axillary glomerules, green. Bracts of pistillate flowers ovate or elliptic, 1.2-2 mm, 1/2 as long as tepals. Pistillate flowers: tepals 5, linear to narrowly oblanceolate, slightly unequal, 2.5-4 mm, margins entire, apex obtuse; style branches erect; stigmas 3. Staminate flowers intermixed with pistillate; tepals 5; stamens 5. Utricles ovoid, 4-6 mm, exceeding tepals, fleshy, smooth or slightly rugose, longitudinally wrinkled on drying, indehiscent. Seeds dark reddish brown, lenticular, 2.5 mm diam., glossy.
More
Monoecious; stems fleshy, prostrate or decumbent, branched from the base, 1–4 dm; lvs fleshy, round-obovate, 1–2 cm, ± retuse at the broadly rounded summit, abruptly narrowed to a 5–10 mm petiole; fls in dense axillary clusters; stamens 5; sep of pistillate fls 5, oblong-oblanceolate, unequal, cucullate, 2–4 mm, twice as long as the lanceolate bracts; fr fleshy, indehiscent, thick-fusiform, 4–5 mm, smooth or rugulose; seed elliptic, 2–2.5 mm. Sea-beaches; Mass. to N.C.; rare.
A herb with stems that lie along the ground. It can form mats. They are red and 10-40 cm long. The leaves are fleshy and clustered near the ends of the branches. They are broadly oval and 1-1.5 cm long. The flowers are yellow. The seeds are reddish brown and 2.5 mm across. They are shiny.
Life form annual
Growth form herb
Growth support -
Foliage retention deciduous
Sexuality monoecy
Pollination -
Spread -
Mature width (meter) -
Mature height (meter) 0.1 - 0.4
Root system -
Rooting depth (meter) -
Root diameter (meter) -
Flower color
Blooming months
JanFebMar
AprMayJun
JulAugSep
OctNovDec
Fruit color -
Fruiting months -
Nitrogen fixer -
Photosynthetic pathway -

Environment

It is a temperate plant. It grows on sandy beaches.
Light 7-9
Soil humidity 5-7
Soil texture 3-4
Soil acidity -
Soil nutriment -
Hardiness (USDA) 4-9

Usage

Uses -
Edible seeds
Therapeutic use -
Human toxicity -
Animal toxicity -

Cultivation

Plants grow from seeds.
Mode seedlings
Germination duration (days) 10 - 15
Germination temperacture (C°) 21 - 23
Germination luminosity -
Germination treatment -
Minimum temperature (C°) -
Optimum temperature (C°) 19 - 30
Size -
Vigor -
Productivity -

Images

Amaranthus pumilus unspecified picture

Distribution

Amaranthus pumilus world distribution map, present in United States of America

Identifiers

LSID urn:lsid:ipni.org:names:327381-2
WFO ID wfo-0000530438
COL ID 5TYXK
BDTFX ID -
INPN ID -
Wikipedia (EN) Link
Wikipedia (FR)

Synonyms

Amaranthus pumilus