Pilea fontana Rydb.

Lesser clearweed (en)

Species

Angiosperms > Rosales > Urticaceae > Pilea

Characteristics

Herbs , annual, 1-7 dm. Stems simple or slightly branched, erect. Leaf blades elliptic to ovate, paired blades equal, 1-10 × 0.6-4.5 cm, margins dentate. Inflorescences crowded or lax. Flowers ca. 1 mm across. Achenes uniformly black except for very narrow, pale, often inconspicuous, marginal band, compressed, teardrop-shaped, 1.3-1.7 × 1-1.5 mm, conspicuously pebbled or warty with raised bosses.
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Much like no. 1 [Pilea pumila (L.) A. Gray], the herbage less pellucid; achenes dark purple or dark olivaceous to nearly black, pale-margined, irregularly elevated on the sides, broadly ovate, 1.3–2 mm, 70–85% as wide; seed tuberculate. Wet, boggy or springy soil; P.E.I. to Minn. and N.D., s. to Va., Ind., and Nebr.; Fla. July–Sept. (P. opaca)
Life form annual
Growth form herb
Growth support -
Foliage retention deciduous
Sexuality -
Pollination -
Spread -
Mature width (meter) -
Mature height (meter) 0.1 - 0.7
Root system -
Rooting depth (meter) -
Root diameter (meter) -
Flower color -
Blooming months -
Fruit color -
Fruiting months -
Nitrogen fixer -
Photosynthetic pathway -

Environment

Light -
Soil humidity -
Soil texture -
Soil acidity -
Soil nutriment -
Hardiness (USDA) 4-9

Usage

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

Cultivation

Mode -
Germination duration (days) 14 - 60
Germination temperacture (C°) 18 - 23
Germination luminosity -
Germination treatment -
Minimum temperature (C°) -
Optimum temperature (C°) -
Size -
Vigor -
Productivity -

Distribution

Pilea fontana world distribution map, present in Canada and United States of America

Conservation status

Pilea fontana threat status: Least Concern

Identifiers

LSID urn:lsid:ipni.org:names:196162-2
WFO ID wfo-0001143411
COL ID 4HSR7
BDTFX ID -
INPN ID -
Wikipedia (EN) Link
Wikipedia (FR) Link

Synonyms

Adicea fontana Adicea opaca Pilea fontana Pilea opaca