Juncus canadensis |
Juncus planifolius |
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Canada rush, Canadian rush |
flat-leaved rush, New Zealand rush |
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Habit | Plants perennial, 30–100 cm tall, cespitose. | Plants perennial, rarely annual, 1–50 cm tall, cespitose, branching, base without tubers. |
Leaves | basal and cauline; round; hollow, septate, 1–2 mm wide; auricles 1–1.2 mm. |
flat; grass-like; auricles absent. |
Inflorescences | panicles of 3–50 clusters; clusters 5–50-flowered, not obscured by inflorescence bract. |
1–35 clusters; clusters 3–10-flowered, sometimes bearing leafy bulblets; inflorescence bracts inconspicuous, membranous; shorter than or equaling inflorescence. |
Flowers | tepals 6, green; reddish, or pale brown; tips acuminate; stamens 3; filaments 0.8–1.5 mm; anthers 0.3–0.5 mm; styles 0.2–0.3 mm. |
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. |
Capsules | usually 0–1 mm longer than the tepals, dark brown, 1-chambered. |
elliptic to ovoid; shorter than or equaling the tepals, brown to dark brown, 1-chambered. |
Seeds | narrowly ellipsoid to linear, 1.25–1.9 × 0.2–0.25 mm; bodies 0.5– 0.8 mm; tails 0.3–0.5 mm, 0.5–1 times as long as seed body. |
0.3–0.45 × 0.2– 0.3 mm, reticulate, apiculate. |
2n | =80. |
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Juncus canadensis |
Juncus planifolius |
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Distribution | ||
Discussion | Shores, ponds, peatlands, disturbed sandy acidic wet ground, cranberry farms, ditches. 0–100 m. Est. WA; north to British Columbia; eastern North America; Europe, New Zealand. Exotic. This species was introduced by cranberry agriculture and is spreading into natural wetlands. Some authors suggest rare flowers have 6 stamens. |
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. |
Source | Flora of Oregon, volume 1, page 273 Peter Zika |
Flora of Oregon, volume 1, page 283 Peter Zika |
Sibling taxa | ||
Web links |
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