UW Burke Herbarium species comparison

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Juncus acutus

Juncus oxymeris

pointed rush
Habit Perennial from spreading rhizomes, often also stoloniferous, the stems 4-9 dm. tall.
Leaves

Leaves alternate, the blades flat, 3-5 mm. broad, one margin turned toward the stem;

leaf bases sheathing, not forming auricles.
Flowers

Inflorescence terminal, large and loose, 15-30 cm. long, much longer than the involucral bract;

heads 10-70, 3-12 flowered, 3-6 mm. broad;

perianth 3-4 mm. long, the 6 segments greenish-yellow to pale brown, subequal, lanceolate-acuminate;

stamens 6, the anthers slightly longer than the filaments;

style slender, 1.5-2 mm. long.
Fruits

Capsule ovoid, tapered to a beak-like tip which slightly exceeds the perianth.

Juncus acutus

Juncus oxymeris
Flowering time May-August
Habitat Wet meadows, wet prairies, shores, swales, and freshwater intertidal marshes.
Distribution
[WildflowerSearch map]
[BONAP county map]
Occurring west of the Cascades crest in Washington; southwestern British Columbia to California.
[WildflowerSearch map]
[BONAP county map]
Origin Native
Conservation status Not of concern
Sibling taxa
J. acuminatus, J. alpinoarticulatus, J. anthelatus, J. articulatus, J. balticus, J. bolanderi, J. brachycarpus, J. brevicaudatus, J. breweri, J. bufonius, J. bulbosus, J. canadensis, J. compressus, J. confusus, J. conglomeratus, J. covillei, J. diffusissimus, J. drummondii, J. dudleyi, J. effusus, J. ensifolius, J. falcatus, J. filiformis, J. gerardi, J. hemiendytus, J. hesperius, J. howellii, J. inflexus, J. interior, J. kelloggii, J. laccatus, J. longistylis, J. mertensianus, J. nevadensis, J. nodosus, J. occidentalis, J. orthophyllus, J. oxymeris, J. parryi, J. patens, J. pelocarpus, J. pylaei, J. regelii, J. saximontanus, J. supiniformis, J. tenuis, J. tiehmii, J. torreyi, J. trilocularis, J. uncialis, J. vaseyi
J. acuminatus, J. alpinoarticulatus, J. anthelatus, J. articulatus, J. balticus, J. bolanderi, J. brachycarpus, J. brevicaudatus, J. breweri, J. bufonius, J. bulbosus, J. canadensis, J. compressus, J. confusus, J. conglomeratus, J. covillei, J. diffusissimus, J. drummondii, J. dudleyi, J. effusus, J. ensifolius, J. falcatus, J. filiformis, J. gerardi, J. hemiendytus, J. hesperius, J. howellii, J. inflexus, J. interior, J. kelloggii, J. laccatus, J. longistylis, J. mertensianus, J. nevadensis, J. nodosus, J. occidentalis, J. orthophyllus, J. parryi, J. patens, J. pelocarpus, J. pylaei, J. regelii, J. saximontanus, J. supiniformis, J. tenuis, J. tiehmii, J. torreyi, J. trilocularis, J. uncialis, J. vaseyi
Web links 
Unless otherwise noted, all data comes from the University of Washington's Burke Herbarium.



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