Juncus planifolius |
Juncus filiformis |
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flat-leaved rush, New Zealand rush |
thread rush |
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Habit | Plants perennial, rarely annual, 1–50 cm tall, cespitose, branching, base without tubers. | Plants perennial, 10–80 cm tall, rhizomatous, stem ridges obscure. |
Leaves | flat; grass-like; auricles absent. |
lacking blades; distal sheaths 3–10 cm, light brown. |
Inflorescences | 1–35 clusters; clusters 3–10-flowered, sometimes bearing leafy bulblets; inflorescence bracts inconspicuous, membranous; shorter than or equaling inflorescence. |
a more or less loose cluster of 4–15 flowers, usually attached near or below middle of stems (stems here including erect inflorescence bracts above inflorescences); inflorescence bracts not swollen at base. |
Flowers | tepals 6, 1.8– 3.2 mm, dark brown to black; smooth; stamens 3; filaments 0.8–1.1 mm; anthers 0.4–0.6 mm, yellow; style 0.2–0.3 mm. |
tepals 6, green or pale brown, 2.5–4 mm; stamens 6; filaments 0.4–0.9 mm; anthers 0.3–0.6 mm; styles 0.1– 0.15 mm. |
Capsules | elliptic to ovoid; shorter than or equaling the tepals, brown to dark brown, 1-chambered. |
2.5–3.5 mm; shorter than or equaling the length of the tepals, green to light brown; apex obtuse to acute, 3-chambered. |
Seeds | 0.3–0.45 × 0.2– 0.3 mm, reticulate, apiculate. |
0.4–0.5 × 0.2–0.25 mm. |
2n | =70, 80, 84. |
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Juncus planifolius |
Juncus filiformis |
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Distribution | ||
Discussion | Muddy or sandy shores, sometimes in shallow water, ditches, cranberry farms, peatlands, damp dune hollows. 0–50 m. Est. CA; HI, South America; Australia, Ireland, New Zealand. Exotic. Juncus planifolius was first collected in Oregon in 1988 and is rapidly spreading. It is native south of the equator. |
Pond shores, wet meadows, marshes. 800–2300 m. BW, Casc. ID, WA; northern North America; Eurasia. Native. |
Source | Flora of Oregon, volume 1, page 283 Peter Zika |
Flora of Oregon, volume 1, page 278 Peter Zika |
Sibling taxa | ||
Web links |
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