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Juncus effusus L.
SOFT RUSH
Juncus communis subsp effusus L EMey; Juncus communis EMey sensu Meyer, EHF 1819; Soft-rush; Common Rush

Life   Plantae   Monocotyledoneae   Juncaceae   Juncus

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Juncus effusus
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Juncus effusus
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Juncus effusus
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Juncus effusus
Juncus effusus
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Juncus effusus
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Juncus effusus

Juncus effusus
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Juncus effusus
Juncus effusus
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Juncus effusus

Juncus effusus
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Juncus effusus
Juncus effusus
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Juncus effusus

Juncus effusus
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Juncus effusus

Associates · map
FamilyScientific name @ source (records)
Agaricaceae  Phoma juncicola @ BPI (2)
Amphisphaeriaceae  Pestalotia versicolor @ BPI (1)
Aphididae  Carolinaia ( @ NCSU_ENT (1)

Prociphilus ( @ NCSU (5)
Davidiellaceae  Cladosporium fasciculatum @ BPI (1)
Delphacidae  Conomelus anceps @ UDCC_TCN (6)

Nothodelphax occlusa @ UDCC_TCN (14)
Dermateaceae  Diplonaevia emergens @ BPI (3)

Mollisia aberrans @ BPI (1)

Mollisia juncina @ BPI (1)

Mollisia phaea @ BPI (1)
Helotiaceae  Pezizella leucostigmoides @ BPI (1)
Hyaloscyphaceae  Dasyscyphus moutonii @ BPI (1)

Dasyscyphus staritzii @ BPI (1)

Lachnum subglabrum @ BPI (2)

Trichopeziza rehmii @ BPI (1)
Microascaceae  Stysanus microsporus @ BPI (1)
Mycosphaerellaceae  Mycosphaerella vogesiaca @ BPI (7)

Rhabdospora junci @ BPI (2)

Septoria junci @ BPI (2)
Nectriaceae  Cylindrium luzulae @ BPI (1)
Nidulariaceae  Mycocalia denudata @ BPI (4)

Mycocalia minutissima @ BPI (6)

Mycocalia sphagneti @ BPI (1)
Phaeosphaeriaceae  Leptosphaeria juncina @ BPI (4)

Leptosphaeria nigrans @ BPI (1)

Leptosphaeria petkovicensis @ BPI (1)

Leptosphaeria pseudodiaporthe @ BPI (1)

Leptosphaeria @ BPI (1)
Phyllachoraceae  Endodothella junci @ BPI (4)

Phyllachora junci @ BPI (17)
Pucciniaceae  Uromyces junci-effusi @ 009716A (1); 196697A (1); BPI (84); 009716B (1); 196697B (1)

Uromyces junci @ BPI (13)

Uromyces silphii @ BPI (2)
Rhytismataceae  Leptostroma juncacearum @ BPI (4)

Leptostroma juncinum @ BPI (2)
Sclerotiniaceae  Myrioconium tenellum @ BPI (2)

Sclerotinia curreyana @ BPI (3)
Sebacinaceae  Sebacina incrustans @ BPI (1)
Xylariaceae  Sphaeria junci @ BPI (1)
_  Cercosporina juncicola @ BPI (2)

Darluca filum @ BPI (1)

Epichloe typhina @ BPI (1)

Erinella apala @ BPI (1)

Erinella juncicola @ BPI (9)

Leptostromella juncina @ BPI (3)

Naevia obscuromarginata @ BPI (1)

Naevia pusilla @ BPI (4)

Nesomartis psammophila @ BPBM_TCN (1)

Periconia atra @ BPI (1)

Phaeosphaerella pheidasca @ BPI (1)

Phragmonaevia emergens @ BPI (4)

Trichobelonium guestphalicum @ BPI (1)

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Following modified from Flora of Taiwan, National Taiwan University
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FNA | Family List | FNA Vol. 22 | Juncaceae | Juncus

7. Juncus effusus Linnaeus, Sp. Pl. 1: 326. 1753.

Soft rush

Juncus conglomeratus Linnaeus; J. effusus var. brunneus Engelmann; J. effusus var. caeruleomontanus H. St. John; J. effusus var. costulatus Fernald; J. effusus var. dicipiens Buchenau; J. effusus var. exiguus Fernald & Wiegand; J. effusus var. gracilis Hooker, J. effusus var. pacificus Fernald & Wiegand; J. effusus var. pylaei (Laharpe) Fernald & Wiegand; J. effusus var. solutus Fernald & Wiegand; J. effusus var. subglomeratus Lamarck & de Candolle; J. griscomii Fernald, J. pylaei Laharpe

Herbs, perennial, 4--13 dm. Rhizomes short -branched, forming distinct, often large clumps. Culms erect, terete, 1--2.5 mm diam. at top of sheaths. Cataphylls several. Leaves: blade absent. Inflorescences lateral, compound dichasia, many flowered; primary bract erect, terete, extending well beyond dichasium. Flowers: tepals tan or darker, usually with greenish midstripe, lanceolate, 1.9--3.5 mm; inner slightly shorter; stamens 3, filaments 0.5--0.8 mm, anthers 0.5--0.8 mm; style 0.2 mm. Capsules greenish tan or darker, 3-locular, broadly ellipsoid to oblate, 1.5--3.2 mm. Seeds amber, (0.3--)0.4---0.5 mm. 2n = 40, 42.

Flowering summer, fruiting summer--fall. Swamps and their edges, marshes, moist meadows, and moist or saturated soils, often conspicuous in pasture meadows where it is shunned by grazing animals; Habitat??; 0--2500 m; B.C., Man., N.B., Nfld. and Labr. (Nfld.), N.S., Ont., P.E.I., Que.; Ala., Alaska, Ariz., Ark., Calif., Colo., Conn., Del., D.C., Fla., Ga., Idaho, Ill., Ind., Iowa, Kans., Ky., La., Maine, Md., Mass., Mich., Minn., Miss., Mo., Mont., Nebr., Nev., N.H., N.J., N.Y., N.C., Ohio, Okla., Oreg., Pa., R.I., S.C., Tenn., Tex., Vt., Va., W.Va., Wash., W.Va., Wis.

The Juncus effusus complex has been variously recognized as containing several species or a single species with numerous infraspecific taxa. Unfortunately, North American treatments have dealt primarily with taxa in either the eastern or western portions of the continent. In considering the continent as a whole, little sense can be made of these treatments. The North American J. effusus complex is one that is in obvious need of modern systematic scrutiny.

SELECTED REFERENCES

Fernald, M. L. and K. M. Wiegand. 1910. The North American variation of Juncus effusus. Rhodora 12: 81--93. Hämet-Ahti, L. 1980. The Juncus effusus aggregate in eastern North America. Ann. Bot. Fenn. 17: 183--191.

Updated: 2021-01-15 23:50:10 gmt
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