FNA: Juncus interior vs. Juncus laccatus

	Juncus interior	Juncus laccatus
	inland rush, interior juncus, interior rush	common rush, lamp rush, shiny rush
Habit	Herbs, perennial, tufted, 2–6 dm.
Rhizomes	densely branching.
Culms	1–10.
Cataphylls	1–3.
Leaves	basal, 1–2(–3); auricles whitish or purplish tinged, 0.2–0.4(–0.6) mm, scarious; blade flat, 5–15 cm × 0.5–1.1 mm, margins entire.
Inflorescences	usually somewhat compact, 1.5–7 cm; primary bract usually shorter than inflorescence.
Flowers	bracteoles 2; tepals greenish, lanceolate, 3.3–4.4 mm, apex acuminate; stamens 6, filaments 0.5–0.9 mm, anthers 0.4–0.6 mm; style 0.1–0.2 mm.
Capsules	light tan or darker, 1-locular to pseudo-3-locular, ellipsoid to nearly globose, (3.3–)3.8–4.7 mm, nearly equal to or longer than tepals.
Seeds	tan, ellipsoid to lunate, 0.436–0.73 mm, not tailed.
2n	= 80.

	Juncus interior	Juncus laccatus
Phenology	Flowering and fruiting late spring–early summer.
Habitat	Dry, often upland sites in prairies, exposed disturbed sites, and ditches in sandy or clayey soils
Distribution	AR; AZ; CO; IA; IL; IN; KS; KY; LA; MN; MO; MT; ND; NE; NM; OH; OK; SD; TN; UT; WI; WY; AB; MB; ON; QC; SK; Texas [WildflowerSearch map] [BONAP county map]	[WildflowerSearch map] [BONAP county map]
Source	FNA vol. 22.
Parent taxa	Juncaceae > Juncus > subg. Poiophylli
Sibling taxa	J. acuminatus, J. acutiflorus, J. acutus, J. alpinoarticulatus, J. anthelatus, J. arcticus, J. articulatus, J. biglumis, J. bolanderi, J. brachycarpus, J. brachycephalus, J. brachyphyllus, J. brevicaudatus, J. bryoides, J. bufonius, J. bulbosus, J. caesariensis, J. canadensis, J. capillaris, J. capitatus, J. castaneus, J. chlorocephalus, J. compressus, J. confusus, J. cooperi, J. coriaceus, J. covillei, J. debilis, J. dichotomus, J. diffusissimus, J. drummondii, J. dubius, J. dudleyi, J. effusus, J. elliottii, J. ensifolius, J. falcatus, J. filiformis, J. filipendulus, J. georgianus, J. gerardii, J. greenei, J. gymnocarpus, J. hallii, J. hemiendytus, J. howellii, J. inflexus, J. kelloggii, J. leiospermus, J. lesueurii, J. longistylis, J. luciensis, J. macrandrus, J. macrophyllus, J. marginatus, J. maritimus, J. megacephalus, J. mertensianus, J. militaris, J. nevadensis, J. nodatus, J. nodosus, J. occidentalis, J. orthophyllus, J. oxymeris, J. parryi, J. patens, J. pelocarpus, J. pervetus, J. phaeocephalus, J. polycephalus, J. regelii, J. repens, J. roemerianus, J. scirpoides, J. secundus, J. squarrosus, J. stygius, J. subcaudatus, J. subtilis, J. supiniformis, J. tenuis, J. texanus, J. textilis, J. tiehmii, J. torreyi, J. trifidus, J. triformis, J. triglumis, J. trigonocarpus, J. uncialis, J. validus, J. vaseyi, J. xiphioides	J. acuminatus, J. acutiflorus, J. acutus, J. alpinoarticulatus, J. anthelatus, J. arcticus, J. articulatus, J. biglumis, J. bolanderi, J. brachycarpus, J. brachycephalus, J. brachyphyllus, J. brevicaudatus, J. bryoides, J. bufonius, J. bulbosus, J. caesariensis, J. canadensis, J. capillaris, J. capitatus, J. castaneus, J. chlorocephalus, J. compressus, J. confusus, J. cooperi, J. coriaceus, J. covillei, J. debilis, J. dichotomus, J. diffusissimus, J. drummondii, J. dubius, J. dudleyi, J. effusus, J. elliottii, J. ensifolius, J. falcatus, J. filiformis, J. filipendulus, J. georgianus, J. gerardii, J. greenei, J. gymnocarpus, J. hallii, J. hemiendytus, J. howellii, J. inflexus, J. interior, J. kelloggii, J. leiospermus, J. lesueurii, J. longistylis, J. luciensis, J. macrandrus, J. macrophyllus, J. marginatus, J. maritimus, J. megacephalus, J. mertensianus, J. militaris, J. nevadensis, J. nodatus, J. nodosus, J. occidentalis, J. orthophyllus, J. oxymeris, J. parryi, J. patens, J. pelocarpus, J. pervetus, J. phaeocephalus, J. polycephalus, J. regelii, J. repens, J. roemerianus, J. scirpoides, J. secundus, J. squarrosus, J. stygius, J. subcaudatus, J. subtilis, J. supiniformis, J. tenuis, J. texanus, J. textilis, J. tiehmii, J. torreyi, J. trifidus, J. triformis, J. triglumis, J. trigonocarpus, J. uncialis, J. validus, J. vaseyi, J. xiphioides
Synonyms	J. arizonicus, J. interior var. arizonicus, J. interior var. neomexicanus, J. monostichus, J. neomexicanus
Name authority	Wiegand: Bulletin of the Torrey Botanical Club 27: 516. (1900)
Web links	Local floras: BC, CA, OR, WA Local Web sites: CalFlora, CalPhotos, Flora NW, IL Wildflowers, KS Wildflowers, LA Plants, MN Wildflowers, MO Plants, PNW Herbaria WildflowerSearch iNaturalist (observations) USDA Plants Database LBJ Wildflower Center SEINet Plants of the World Online Encyclopedia of Life Wikipedia Google Image Search	Local floras: BC, CA, OR, WA Local Web sites: CalFlora, CalPhotos, Flora NW, PNW Herbaria WildflowerSearch iNaturalist (observations) LBJ Wildflower Center SEINet Plants of the World Online Encyclopedia of Life Wikipedia Google Image Search

Juncus interior

Juncus laccatus

inland rush, interior juncus, interior rush

common rush, lamp rush, shiny rush

Habit

Herbs, perennial, tufted, 2–6 dm.

Rhizomes

densely branching.

Culms

1–10.

Cataphylls

1–3.

Leaves

basal, 1–2(–3);

auricles whitish or purplish tinged, 0.2–0.4(–0.6) mm, scarious;

blade flat, 5–15 cm × 0.5–1.1 mm, margins entire.

Inflorescences

usually somewhat compact, 1.5–7 cm;

primary bract usually shorter than inflorescence.

Flowers

bracteoles 2;

tepals greenish, lanceolate, 3.3–4.4 mm, apex acuminate;

stamens 6, filaments 0.5–0.9 mm, anthers 0.4–0.6 mm;

style 0.1–0.2 mm.

Capsules

light tan or darker, 1-locular to pseudo-3-locular, ellipsoid to nearly globose, (3.3–)3.8–4.7 mm, nearly equal to or longer than tepals.

Seeds

tan, ellipsoid to lunate, 0.436–0.73 mm, not tailed.

= 80.

Juncus interior

Juncus laccatus

Phenology

Flowering and fruiting late spring–early summer.

Habitat

Dry, often upland sites in prairies, exposed disturbed sites, and ditches in sandy or clayey soils

Distribution

AR; AZ; CO; IA; IL; IN; KS; KY; LA; MN; MO; MT; ND; NE; NM; OH; OK; SD; TN; UT; WI; WY; AB; MB; ON; QC; SK; Texas

[WildflowerSearch map]

[BONAP county map]

[WildflowerSearch map]

[BONAP county map]

Source

FNA vol. 22.

Parent taxa

Juncaceae > Juncus > subg. Poiophylli

Sibling taxa

J. acuminatus, J. acutiflorus, J. acutus, J. alpinoarticulatus, J. anthelatus, J. arcticus, J. articulatus, J. biglumis, J. bolanderi, J. brachycarpus, J. brachycephalus, J. brachyphyllus, J. brevicaudatus, J. bryoides, J. bufonius, J. bulbosus, J. caesariensis, J. canadensis, J. capillaris, J. capitatus, J. castaneus, J. chlorocephalus, J. compressus, J. confusus, J. cooperi, J. coriaceus, J. covillei, J. debilis, J. dichotomus, J. diffusissimus, J. drummondii, J. dubius, J. dudleyi, J. effusus, J. elliottii, J. ensifolius, J. falcatus, J. filiformis, J. filipendulus, J. georgianus, J. gerardii, J. greenei, J. gymnocarpus, J. hallii, J. hemiendytus, J. howellii, J. inflexus, J. kelloggii, J. leiospermus, J. lesueurii, J. longistylis, J. luciensis, J. macrandrus, J. macrophyllus, J. marginatus, J. maritimus, J. megacephalus, J. mertensianus, J. militaris, J. nevadensis, J. nodatus, J. nodosus, J. occidentalis, J. orthophyllus, J. oxymeris, J. parryi, J. patens, J. pelocarpus, J. pervetus, J. phaeocephalus, J. polycephalus, J. regelii, J. repens, J. roemerianus, J. scirpoides, J. secundus, J. squarrosus, J. stygius, J. subcaudatus, J. subtilis, J. supiniformis, J. tenuis, J. texanus, J. textilis, J. tiehmii, J. torreyi, J. trifidus, J. triformis, J. triglumis, J. trigonocarpus, J. uncialis, J. validus, J. vaseyi, J. xiphioides

J. acuminatus, J. acutiflorus, J. acutus, J. alpinoarticulatus, J. anthelatus, J. arcticus, J. articulatus, J. biglumis, J. bolanderi, J. brachycarpus, J. brachycephalus, J. brachyphyllus, J. brevicaudatus, J. bryoides, J. bufonius, J. bulbosus, J. caesariensis, J. canadensis, J. capillaris, J. capitatus, J. castaneus, J. chlorocephalus, J. compressus, J. confusus, J. cooperi, J. coriaceus, J. covillei, J. debilis, J. dichotomus, J. diffusissimus, J. drummondii, J. dubius, J. dudleyi, J. effusus, J. elliottii, J. ensifolius, J. falcatus, J. filiformis, J. filipendulus, J. georgianus, J. gerardii, J. greenei, J. gymnocarpus, J. hallii, J. hemiendytus, J. howellii, J. inflexus, J. interior, J. kelloggii, J. leiospermus, J. lesueurii, J. longistylis, J. luciensis, J. macrandrus, J. macrophyllus, J. marginatus, J. maritimus, J. megacephalus, J. mertensianus, J. militaris, J. nevadensis, J. nodatus, J. nodosus, J. occidentalis, J. orthophyllus, J. oxymeris, J. parryi, J. patens, J. pelocarpus, J. pervetus, J. phaeocephalus, J. polycephalus, J. regelii, J. repens, J. roemerianus, J. scirpoides, J. secundus, J. squarrosus, J. stygius, J. subcaudatus, J. subtilis, J. supiniformis, J. tenuis, J. texanus, J. textilis, J. tiehmii, J. torreyi, J. trifidus, J. triformis, J. triglumis, J. trigonocarpus, J. uncialis, J. validus, J. vaseyi, J. xiphioides

Synonyms

J. arizonicus, J. interior var. arizonicus, J. interior var. neomexicanus, J. monostichus, J. neomexicanus

Name authority

Wiegand: Bulletin of the Torrey Botanical Club 27: 516. (1900)

Web links

Local floras: BC, CA, OR, WA
Local Web sites: CalFlora, CalPhotos, Flora NW, IL Wildflowers, KS Wildflowers, LA Plants, MN Wildflowers, MO Plants, PNW Herbaria
WildflowerSearch
iNaturalist (observations)
USDA Plants Database
LBJ Wildflower Center
SEINet
Plants of the World Online
Encyclopedia of Life
Wikipedia
Google Image Search

Local floras: BC, CA, OR, WA
Local Web sites: CalFlora, CalPhotos, Flora NW, PNW Herbaria
WildflowerSearch
iNaturalist (observations)
LBJ Wildflower Center
SEINet
Plants of the World Online
Encyclopedia of Life
Wikipedia
Google Image Search

Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).

Choose a data source: Flora of North America, OregonFlora, UW Burke Herbarium

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Flora of North America species comparison

Juncus interior

Juncus laccatus

Juncus interior

Juncus laccatus