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Baltic rush, dark Baltic rush

Habit Plants perennial, 25–150 cm tall, rhizomatous, stems without strong ridges visible fresh or dried.
Leaves

lacking blades;

distal sheaths 4–16 cm; pale to dark brown; shiny or dull;

apex usually symmetrical; thin.

Inflorescences

more or less diffuse, with 5–45 flowers;

branches obvious, attached well above middle of stem (stems here including erect inflorescence bracts above inflorescence);

inflorescence bracts not swollen at base.

Flowers

tepals 6, 4–5.5(6) mm, dark brown- or black-striped;

stamens 6;

filaments 0.4–0.7 mm;

anthers 1.2–2.2 mm;

styles 0.7–1.3 mm.

Capsules

3.5–4.5 mm, usually shorter than or equaling the tepals, brown to dark brown;

apex acute to acuminate, 1-chambered.

Seeds

0.7–0.9 × 0.35–0.45 mm, apiculate.

Juncus balticus ssp. ater

Distribution
[BONAP county map]
Discussion

Shores, dunes, saline marshes, meadows, swales, ditches. 0–3000 m. All ecoregions except CR. CA, NV, ID, WA; east to SD. Native.

A widespread and common taxon across the state, J. balticus ssp. ater never shows the leaf blades characteristic of the otherwise similar J. mexicanus. The division of North American plants into two subspecies is questionable.

Source Flora of Oregon, volume 1, page 271
Peter Zika
Synonyms Juncus arcticus, Juncus arcticus var. balticus, Juncus balticus ssp. balticus, Juncus balticus var. balticus, Juncus balticus var. montanus, Juncus balticus var. vallicola
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