The green links below add additional plants to the comparison table. Blue links lead to other Web sites.
enable glossary links

Canada rush, Canadian rush

flat-leaved rush, New Zealand rush

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.

Juncus canadensis

Juncus planifolius

Distribution
[WildflowerSearch map]
[BONAP county map]
[BONAP county map]
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
J. acuminatus, J. anthelatus, J. articulatus, J. balticus, J. bolanderi, J. brevicaudatus, J. breweri, J. bryoides, J. bufonius, J. bulbosus, J. capillaris, J. capitatus, J. compressus, J. confusus, J. conglomeratus, J. covillei, J. diffusissimus, J. drummondii, J. dudleyi, J. effusus, J. ensifolius, J. ensifolius x Juncus nevadensis, J. exiguus, J. falcatus, J. filiformis, J. gerardi, J. hemiendytus, J. hesperius, J. howellii, J. inflexus, J. interior, J. kelloggii, J. laccatus, J. lescurii, J. longistylis, J. marginatus, J. mertensianus, J. mexicanus, J. nevadensis, J. occidentalis, J. orthophyllus, J. oxymeris, J. parryi, J. patens, J. pelocarpus, J. planifolius, J. ranarius, J. regelii, J. saximontanus, J. supiniformis, J. tenuis, J. tiehmii, J. torreyi, J. triglumis, J. trilocularis, J. uncialis
J. acuminatus, J. anthelatus, J. articulatus, J. balticus, J. bolanderi, J. brevicaudatus, J. breweri, J. bryoides, J. bufonius, J. bulbosus, J. canadensis, J. capillaris, J. capitatus, J. compressus, J. confusus, J. conglomeratus, J. covillei, J. diffusissimus, J. drummondii, J. dudleyi, J. effusus, J. ensifolius, J. ensifolius x Juncus nevadensis, J. exiguus, J. falcatus, J. filiformis, J. gerardi, J. hemiendytus, J. hesperius, J. howellii, J. inflexus, J. interior, J. kelloggii, J. laccatus, J. lescurii, J. longistylis, J. marginatus, J. mertensianus, J. mexicanus, J. nevadensis, J. occidentalis, J. orthophyllus, J. oxymeris, J. parryi, J. patens, J. pelocarpus, J. ranarius, J. regelii, J. saximontanus, J. supiniformis, J. tenuis, J. tiehmii, J. torreyi, J. triglumis, J. trilocularis, J. uncialis
Web links