Juncus imbricatus Laharpe APNI* Synonyms: Juncus chamissonis Kunth APNI*
Description: Tufted, shortly rhizomatous perennial. Culms terete to slightly compressed, 10–45 (rarely to 60) cm long, 0.7–1.0 (rarely to 1.6) mm diam.
Leaves basal, generally shorter than culms; blade canaliculate to ± terete near apex, 0.5–1.0 (rarely to 2.5) mm wide; auricles less than or equalling 0.5 mm; sheath pale yellow.
Inflorescence terminal or pseudolateral, diffuse, 1–4 cm long, usually 2–10-flowered; flowers solitary; involucral bract 1, well-developed, 0.7–7 cm long, longer than to shorter than inflorescence. Tepals straw-brown with slightly darker band each side of midrib region, with broad hyaline margins; outer tepals 3.4–4.2 mm long, longer than or equalling inner. Stamens 6, shorter than outer tepals; anthers 0.7–1.1 mm long, shorter than or equalling filaments.
Capsule much longer than outer tepals, ellipsoid to ovoid, obtuse, not apiculate, golden brown, often darker near apex.
Flowering: spring–summer.
Distribution and occurrence: Naturalized; frequent in Sydney region and Shellharbour, also recorded from near Kioloa. Native of S Amer. In disturbed situations, often on sandy soil.
NSW subdivisions: *NC, *CC, *SC
Other Australian states: *Vic. *W.A.
The closely appressed tepals, red-brown capsules, and strongly ribbed culms distinguish this species from J. tenuis.
Text by K. L. Wilson, L. A. S. Johnson & P. Bankoff (1993); edited KL Wilson (July 2016, Nov 2022)
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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