Saltmarsh Bulrush - Bolboschoenus maritimus
Scirpus maritimus, Schoenoplectus maritimus
MNPS Threat Rank
Perennials to 150 cm tall from robust rhizomes, these commony bearing tubers. Culms sharply triangular, often with concave sides, 3-13 mm thick towards the base. Leaves commonly 4-8, borne on the lower 1/2 of the stem; blades mostly 10-40 cm longer to 1 cm wide, the lower 1 or 2 sometimes reduced to bladeless sheaths. Leaflike involucral bracts usually 2 or 3, the longest one usually much exceeding the others and up to 34 cm long. Scalelike involucral bracts few to several, the larger ones with the green midrib exserted as a caudate awn. Spikelets 3-25 (rarely more), 10-35 mm long, 5-10 mm thick, all sessile in a compact cluster or with 1-4 additional clusters borne on peduncles to 6 cm long; scales tan or light brown, rarely dark brown, scarious, minutely hirtellous on the back, the firm midrib exserted as a mucronate awn, this commonly 1-3 times longer than the apical notch of the scale; perianth bristles few, minutely retrorse-barbellate, ca. 1/4-1/2(-3/4) as long as the achenes; styles 2-branched for ca. 1/3 the length. Achenes 2.5-4 mm long, lenticular, minutely cellular-reticulate (adapted from: Welsh et al., 1993, A Utah Flora, 2nd ed.).
Across much of North America but only infrequently east of the Great Plains (Kartesz in prep. 2012).
Observations in Montana Natural Heritage Program Database
Number of Observations:
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(Observations spanning multiple months or years are excluded from time charts)
- Additional ReferencesLegend: View Online Publication
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- Lesica, P., M.T. Lavin, and P.F. Stickney. 2012. Manual of Montana Vascular Plants. Fort Worth, TX: BRIT Press. viii + 771 p.