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Juncus bulbosus L.
Family Juncaceae
Juncus bulbosus L. APNI*

Description: Tufted perennial, often with slightly bulbous bases, often rooting at nodes or proliferating from inflorescence. Culms terete, 6–30 cm long, 0.5–1.0 mm diam.

Leaves pluritubulose but often hard to see in filiform leaves, spread along culms, longer than or equalling culms; blade terete, often slightly canaliculate, 0.3–0.7 (rarely to 1.2) mm diam.; auricles 1–2 mm long.

Inflorescence terminal, diffuse, 2–7 cm long; flowers clustered, or occasionally solitary, at apex of branches, 2–10 flowers per cluster and 1–15 clusters per inflorescence; involucral bract 1, well-developed, 0.6–11 cm long, shorter than inflorescence. Tepals straw-brown to red-brown, with ± broad hyaline margins; outer tepals 2.0–3.0 (rarely to 3.5) mm long, slightly shorter than to longer than inner tepals. Stamens 3–6, shorter than outer tepals; anthers 0.5–0.7 mm long.

Capsule longer than or equalling outer tepals, ± oblong to narrow-ellipsoid, obtuse, apiculate, golden brown to dark brown.



Flowering: spring–summer.

Distribution and occurrence: Scattered, from Blue Mtns to Budawang Range and the far South Coast. Native of NW Africa, Eur., Iceland, Greenland, Newfoundland.

Naturalized in wet situations.
NSW subdivisions: *CC, *SC, *CT, *ST
Other Australian states: *Vic. *Tas. *S.A.
AVH map***

Often proliferating in flower clusters or extravaginally from culms. Tepals less commonly obtuse in Australasia than in Europe. Culms are very slender and elongated if growing in water. Basal leaves usually ± filiform. Commonly 3–5 stamens per flower on same plant.

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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