UW Burke Herbarium species comparison

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Juncus effusus

Juncus trifidus

Habit Strongly tufted perennial with stout rhizomes, the stems terete, 2-10 dm. tall, finely grooved, 1.5-3 mm. thick.
Leaves

Leaves bladeless or with a short, awn-like blade;

leaf bases sheathing, the sheaths pale to deep brown, 5-12 cm. long.

Flowers

Inflorescence apparently lateral, the involucral bract terete and resembling the stem, 5-20 cm. long, up to 1/3 the length of the stem;

flowers numerous in a subcapitate to diffuse panicle up to 15 cm. long;

perianth 2.5-3.5 mm. long, the 6 segments narrowly lanceolate;

stamens 3, opposite the outer tepals.

Fruits

Capsule equal to the perianth, obovoid but three-angled above, flat on the end.

Juncus effusus

Juncus trifidus
Flowering time June-August
Habitat Moist areas, from coastal tideflats to mountain meadows and ridges.
Distribution
Occurring on both sides of the Cascades crest in Washington; Alaska to California, east across most of North America to the Atlantic Coast.
[WildflowerSearch map]
[BONAP county map]
[BONAP county map]
Origin Both native and introduced
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. 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. 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
Subordinate taxa
J. effusus ssp. effusus, J. effusus ssp. pacificus, J. effusus ssp. solutus
Web links 
Unless otherwise noted, all data comes from the University of Washington's Burke Herbarium.



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