Bolboschoenus maritimus subsp. paludosus

(A. Nelson) T. Koyama

Acta Phytotax. Geobot. 31: 148. 1980.

Common names: Bolboschoenus des marais salés scirpe des marais salés
Basionym: Scirpus paludosus A. Nelson Bull. Torrey Bot. Club 26: 5. 1899 Scirpus campestris Britton 1896
Synonyms: Scirpus maritimus var. paludosus (A. Nelson) Kükenthal Scirpus pacificus
Treatment appears in FNA Volume 23. Treatment on page 41. Mentioned on page 40.
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Scales medium brown to nearly colorless, rarely dark brown. Styles all 2-fid (rarely, some 3-fid). Achenes medium brown, sometimes darker or paler, biconvex.

Phenology: Fruiting spring–fall (south and lowland California), summer (north).
Habitat: Brackish to saline coastal and inland shores, marshes
Elevation: 0–2900 m


V23 57-distribution-map.jpg

Alta., B.C., Man., N.B., N.W.T., N.S., Ont., P.E.I., Que., Sask., Alaska, Ariz., Calif., Colo., Conn., Idaho, Ill., Iowa, Kans., Maine, Mass., Mich., Minn., Mo., Mont., Nebr., Nev., N.H., N.J., N.Mex., N.Y., N.Dak., Okla., Oreg., R.I., S.Dak., Tex., Utah, Wash., Wyo., Mexico, South America (Argentina, Peru), Pacific Islands (Hawaii).


Many bipistillate specimens from Eurasia and Africa are very similar to American plants. Further study may show that these plants should be included in Bolboschoenus maritimus subsp. paludosus.

Plants from seashores have bright brown floral scales and medium to dark brown achenes; plants from the western interior have bright brown to very pale floral scales and/or achenes.

Around Chicago, Illinois, Bolboschoenus maritimus subsp. paludosus is spreading with other halophytes in roadside ditches where salts accumulate; it is likely to occur elsewhere in similar conditions. Bolboschoenus maritimus subsp. paludosus is planted for waterfowl food (H. A. George 1963, as Scirpus robustus), and in California it is sometimes mixed with B. glaucus and hybrids. The tough inner vascular cores of the rhizomes are used by Native Americans of the Pacific Coast in making baskets.

Selected References


Lower Taxa

S. Galen Smith +
(A. Nelson) T. Koyama +
Scirpus paludosus +  and Scirpus campestris +
Bolboschoenus des marais salés +  and scirpe des marais salés +
Alta. +, B.C. +, Man. +, N.B. +, N.W.T. +, N.S. +, Ont. +, P.E.I. +, Que. +, Sask. +, Alaska +, Ariz. +, Calif. +, Colo. +, Conn. +, Idaho +, Ill. +, Iowa +, Kans. +, Maine +, Mass. +, Mich. +, Minn. +, Mo. +, Mont. +, Nebr. +, Nev. +, N.H. +, N.J. +, N.Mex. +, N.Y. +, N.Dak. +, Okla. +, Oreg. +, R.I. +, S.Dak. +, Tex. +, Utah +, Wash. +, Wyo. +, Mexico +, South America (Argentina +, Peru) +  and Pacific Islands (Hawaii). +
0–2900 m +
Brackish to saline coastal and inland shores, marshes +
Fruiting spring–fall (south and lowland California), summer (north). +
Acta Phytotax. Geobot. +
Illustrated +
Scirpus maritimus var. paludosus +  and Scirpus pacificus +
Bolboschoenus maritimus subsp. paludosus +
Bolboschoenus maritimus +
subspecies +