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Juncus usitatus L.A.S.Johnson
Family Juncaceae
Juncus usitatus L.A.S.Johnson APNI*

Description: Shortly rhizomatous perennial, densely tufted. Culms terete, 40–110 cm long, 0.5–1.9 (rarely to 2.3) mm diam., ± soft, mid-green; culm striations 20–40; pith interrupted or occasionally continuous.

Cataphylls 6–18 cm long, ± lax, abaxially golden brown to red-brown at base, adaxially silvery to golden brown. Inflorescence pseudolateral, diffuse, 2–7 cm long; flowers numerous, solitary; lowest involucral bract 10–28 cm long, longer than inflorescence. Tepals straw-brown, with ± broad hyaline margins; outer tepals 1.3–2.0 (rarely to 2.2) mm long, longer than or equalling inner tepals. Stamens 3 (rarely to 6), shorter than outer tepals; anthers 0.3–0.6 mm long.

Capsule longer than outer tepals, ellipsoid, obtuse, not or scarcely apiculate, golden brown.


Habit
Photo L. von Richter

Flower
Photo L. von Richter

Fruit
Photo L. von Richter

Herbarium
Sheet

Herbarium
Sheet

Flowering: spring–summer.

Distribution and occurrence: Extending inland to near Dubbo and along the Murray River valley; probably introduced in irrigation areas near Warren, Griffith and Hay.

Very common on stream banks and other moist places.
NSW subdivisions: NC, CC, SC, NT, CT, ST, NWS, CWS, SWS, NWP, SWP
Other Australian states: Qld Vic. *W.A. *S.A.
AVH map***

Hybridizes with J. polyanthemus.

Text by K. L. Wilson, L. A. S. Johnson & P. Bankoff
Taxon concept: Flora of NSW 4 (1993)


APNI* Provides a link to the Australian Plant Name Index (hosted by the Australian National Botanic Gardens) for comprehensive bibliographic data
***The AVH map option provides a detailed interactive Australia wide distribution map drawn from collections held by all major Australian herbaria participating in the Australian Virtual Herbarium project.
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