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Juncus conglomeratus L.

Compact rush (en), Jonc aggloméré (fr)

Species

Angiosperms > Poales > Juncaceae > Juncus

Characteristics

Erect clumps; rhizomes short. Stems 30-80 cm × 1.5-3 mm, soft and easily split, grey-green, dull, prominently ridged especially just below inflorescence, pith continuous, cobwebby. Basal sheaths brownish-red, not shining. Inflorescence a ± spherical head c. 1 cm long, base of subtending floral bract conspicuously red-tinged and expanded to a wide opening through which inflorescence emerges. Flowers very crowded. Tepals 2-2.5 mm long, ± equal, acuminate. Stamens 3. Capsule c. 2 mm long, ± = tepals, ovoid-oblong, flattened at top, reddish-brown.
More
Much like no. 16 [Juncus pylaei Laharpe], but with very dense and head-like infl mostly 1.5–2.5 × 1–1.5 cm; invol lf 5–15 cm; tep a little looser, the outer as long as the inner; fr usually mucronate; basal sheaths usually rather pale brown; stem avg with more numerous (up to 25 or even 30) ridges; fr truncate, apiculate; 2n=42. Low, marshy or boggy or peaty places; native of Europe, locally intr. from Nf. and N.S. to N.Y. and Que. (J. effusus var. c.)
Life form perennial
Growth form herb
Growth support free-standing
Foliage retention evergreen
Sexuality hermaphrodite
Pollination anemogamy
Spread epizoochory
Mature width (meter) -
Mature height (meter) 1.13 - 1.25
Root system creeping-root rhizome
Rooting depth (meter) -
Root diameter (meter) -
Flower color
Blooming months
JanFebMar
AprMayJun
JulAugSep
OctNovDec
Fruit color -
Fruiting months -
Nitrogen fixer -
Photosynthetic pathway c3

Environment

Wet pastures, bogs, damp woods etc, almost exclusively on acid soils..
Light 4-9
Soil humidity 5-9
Soil texture 1-3
Soil acidity 2-7
Soil nutriment -
Hardiness (USDA) 4-9

Usage

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

Cultivation

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

Images

Habit

Juncus conglomeratus habit picture by Nicolas Lagarrigue (cc-by-sa)
Juncus conglomeratus habit picture by Alain Bigou (cc-by-sa)
Juncus conglomeratus habit picture by Patrice Nodet (cc-by-sa)

Leaf

Juncus conglomeratus leaf picture by Tuomo Tuomo (cc-by-sa)
Juncus conglomeratus leaf picture by ar lima (cc-by-sa)
Juncus conglomeratus leaf picture by Dominique Vioux (cc-by-sa)

Flower

Juncus conglomeratus flower picture by Bianca Dupont (cc-by-sa)
Juncus conglomeratus flower picture by Marysia Kay (cc-by-sa)
Juncus conglomeratus flower picture by Ilona Böttcher (cc-by-sa)

Fruit

Juncus conglomeratus fruit picture by ar lima (cc-by-sa)
Juncus conglomeratus fruit picture by Daniel Gaona Carrilero (cc-by-sa)
Juncus conglomeratus fruit picture by Niek Castricum (cc-by-sa)

Distribution

Juncus conglomeratus world distribution map, present in Australia, Austria, Belgium, Bulgaria, Bosnia and Herzegovina, Belarus, Brazil, Canada, Switzerland, Czech Republic, Germany, Denmark, Algeria, Spain, Estonia, Finland, France, United Kingdom of Great Britain and Northern Ireland, Georgia, Greece, Croatia, Hungary, Iraq, Italy, Liberia, Liechtenstein, Lithuania, Luxembourg, Latvia, Morocco, North Macedonia, Malta, Montenegro, Netherlands, Norway, New Zealand, Poland, Portugal, Romania, Russian Federation, Serbia, Slovakia, Slovenia, Sweden, Tunisia, Turkey, Ukraine, United States of America, Venezuela (Bolivarian Republic of), and South Africa

Conservation status

Juncus conglomeratus threat status: Least Concern

Identifiers

LSID urn:lsid:ipni.org:names:442841-1
WFO ID wfo-0000776253
COL ID 3QTLR
BDTFX ID 36482
INPN ID 104160
Wikipedia (EN) Link
Wikipedia (FR) Link

Synonyms

Juncus subuliflorus f. leersii Juncus leersii Tristemon glomeratum Juncus effusus f. conglomeratus Juncus leersii f. subuliflorus Juncus leersii f. viridiflorus Juncus subuliflorus f. leersii Juncus glomeratus Juncus matthioli Juncus subuliflorus Juncus communis var. conglomeratus Juncus conglomeratus var. laxus Juncus conglomeratus subsp. subuliflorus Juncus effusus var. conglomeratus Juncus effusus subsp. conglomeratus Juncus leersii var. laxus Juncus leersii var. praeflorens Juncus leersii var. subuliflorus Juncus leersii var. viridiflorus Juncus subuliflorus f. laxus Juncus subuliflorus f. praeflorens Juncus conglomeratus var. umbrosus Juncus conglomeratus
WorldFloraDB 2024