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moss rush, mosslike dwarf rush

Baltic rush, wire rush

Habit Herbs, annual, cespitose, 0.03–0.25 dm. Herbs, 2–10 dm.
Culms

to 150, 0.1–0.2 mm wide.

Leaves

to 0.9 cm, 1/4–1 times height of plant.

blade absent.

Inflorescences

terminal solitary flowers;

bracts subtending inflorescence (1–)2, ovate, inconspicuous, 0.3–0.9 mm, membranous, apex acute.

6–many-flowered, loose to congested;

primary bract usually several times longer than inflorescence.

Flowers

3-merous;

: tepals (4–)6(–8), turning inward to enwrap shorter capsule at maturity, chestnut brown to black, lanceolate to oblong, 1.2–2.3(–2.8) × 0.4–0.6 mm;

;

outer and inner series nearly equal, acute to acuminate;

stamens 3, filaments 0.3–0.6 mm, anthers 0.15–0.25 mm;

style 0.1 mm, stigma 0.2–0.3 mm.

tepals blackish to light brown, occasionally paler, (2.5–)3.5–5.5(–6) mm;

filaments 0.2–0.5 mm, anthers 1.2–2.2 mm.

Capsules

pale reddish, 3-locular, ovoid to ellipsoid, 1–1.9 mm × 0.5–1 mm.

Seeds

ovoid to globose, 0.3–0.5 mm.

2n

= ca. 38.

Juncus bryoides

Juncus arcticus var. balticus

Phenology Flowering and fruiting spring–mid summer. Flowering spring–early summer.
Habitat Usually fine, sandy soil of washes, swales in meadows, and seepage areas on rock outcrops Shores, stream margins, wet meadows, fens, marshes, often slightly alkaline soils
Elevation 600–3600 m (2000–11800 ft)
Distribution
from FNA
CA; CO; ID; NV; OR; UT; Mexico
[WildflowerSearch map]
[BONAP county map]
from FNA
AK; AR; AZ; CA; CO; DE; IA; ID; IL; IN; KS; MA; MD; ME; MI; MN; MO; MT; ND; NE; NH; NM; NV; NY; OH; OK; OR; PA; SD; TX; UT; VA; VT; WA; WI; WV; WY; AB; BC; MB; NB; NL; NS; NT; NU; ON; PE; QC; SK; YT; Mexico; South America; Greenland; Europe; Asia
[WildflowerSearch map]
[BONAP county map]
Source FNA vol. 22. FNA vol. 22.
Parent taxa Juncaceae > Juncus > subg. Graminifolii Juncaceae > Juncus > subg. Genuini > Juncus arcticus
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. 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
J. arcticus var. alaskanus, J. arcticus var. balticus, J. arcticus var. mexicanus
Synonyms J. balticus, J. arcticus subsp. ater, J. arcticus subsp. littoralis, J. arcticus var. gracilis, J. arcticus var. littoralis, J. arcticus var. montanus, J. arcticus var. montanus, J. ater, J. balticus subsp. littoralis, J. balticus subsp. vallicola, J. balticus var. condensatus, J. balticus var. eremicus, J. balticus var. littoralis, J. balticus var. melanogenus, J. balticus var. montanus, J. balticus var. vallicola, J. breweri, J. vallicola
Name authority F. J. Hermann: Leaflets of Western Botany 5: 117. (1948) (Willdenow) Trautvetter: Trudy Imperatorskago. Acta Horti Petropolitani. 5: 119. (1878)
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