OregonFlora species comparison

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Juncus acutus

Juncus torreyi

Torrey's rush
Habit Plants perennial, 30–100 cm tall, rhizomatous, rhizomes elongate, usually swollen or tuberous, at least at some nodes, perennial.
Leaves

round; hollow, septate, often stiff and divaricate;

auricles 1–3.5 mm.
Inflorescences

1–23 dense head-like clusters; clusters globose with 26–80 flowers.
Flowers

tepals 6, brown; greenish or reddish;

tips acuminate;

stamens 6;

filaments 0.6–1.2 mm;

anthers 0.4– 0.8 mm;

styles 0.1–0.2 mm.
Capsules

equaling or longer than the tepals, pale brown to dark brown, gradually tapered to acuminate tips, 1-chambered.
Seeds

ellipsoid to ovoid, 0.4–0.5 × 0.2–0.3 mm, apiculate.
2n

=40.

Juncus acutus

Juncus torreyi
Distribution
[WildflowerSearch map]
[BONAP county map]
[WildflowerSearch map]
[BONAP county map]
Discussion

Shores, swales, springs, ditches. 50–1300m. BW, Col, Lava, Owy. CA, NV, ID, WA; across the US and southern Canada, south to Mexico. Native.

This is primarily an eastern Oregon species, with large globose clusters, peculiar swollen rhizome nodes, and spreading stiff foliage.
Source Flora of Oregon, volume 1, page 284
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. 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. 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. planifolius, J. ranarius, J. regelii, J. saximontanus, J. supiniformis, J. tenuis, J. tiehmii, J. triglumis, J. trilocularis, J. uncialis
Web links 
Unless otherwise noted, all data comes from OregonFlora.



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