Ranunculus pusillus Poir.

Low spearwort (en)

Species

Angiosperms > Ranunculales > Ranunculaceae > Ranunculus

Characteristics

Stems erect or ascending, rooting at most proximal nodes, glabrous. Roots not thickened basally, glabrous. Proximal cauline leaf blades ovate or lanceolate, 1.2-4.2 × 0.5-1.2 cm, base acute to truncate, margins entire or denticulate, apex acuminate to rounded. Inflorescences: bracts linear to lanceolate or oblanceolate. Flowers: receptacle glabrous; sepals 4-5, spreading or reflexed from base, 1.5-3 × 1-1.5 mm, glabrous or sparsely hirsute; petals 1-3, 1.5-2 × 0.5-1 mm; nectary scales glabrous. Heads of achenes hemispheric to cylindric, 2-8 × 2-3 mm; achenes 1-1.2 × 0.6-0.8 mm, ± tuberculate, glabrous; beak absent or nearly so, to 0.1 mm.
More
Annual; stems weak, ascending or erect, 1–5 dm, branched from the base, many-fld; lower lvs long-petioled, ovate or lance-ovate, 1–4 cm, basally obtuse or rounded; cauline lvs progressively narrower, most of them linear, scarcely differentiated into blade and petiole; pet 1–5, 2 mm, equaling or a little shorter than the sep; stamens 10 or fewer; achenes 1 mm, very shortly beaked. Ditches, muddy ground, and shallow water, mostly on the coastal plain; s. N.Y. to Fla. and Tex., n. in the interior to Mo., Ind., and O. May, June.
Life form annual
Growth form herb
Growth support -
Foliage retention deciduous
Sexuality hermaphrodite
Pollination -
Spread -
Mature width (meter) -
Mature height (meter) 0.08 - 0.5
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

Light -
Soil humidity 10-12
Soil texture -
Soil acidity -
Soil nutriment -
Hardiness (USDA) 5-10

Usage

Uses medicinal
Edible -
Therapeutic use Cancer (unspecified)
Human toxicity -
Animal toxicity -

Cultivation

Mode -
Germination duration (days) 30 - 90
Germination temperacture (C°) 10
Germination luminosity -
Germination treatment -
Minimum temperature (C°) -
Optimum temperature (C°) -
Size -
Vigor -
Productivity -

Images

Ranunculus pusillus unspecified picture

Distribution

Ranunculus pusillus world distribution map, present in United States of America

Identifiers

LSID urn:lsid:ipni.org:names:713640-1
WFO ID wfo-0001129445
COL ID 4RHJD
BDTFX ID -
INPN ID -
Wikipedia (EN) Link
Wikipedia (FR)

Synonyms

Ranunculus pusillus Ranunculus tener Ranunculus oblongifolius Ranunculus biolettii Ranunculus pusillus var. angustifolius Ranunculus trachyspermus var. angustifolius Ranunculus pusillus var. denticulatus Ranunculus pusillus var. lindheimeri Ranunculus pusillus var. muticus Ranunculus trachyspermus var. lindheimeri