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Bolboschoenus maritimus

Species category

Weed

Common name

cosmopolitan bulrush

Diagnostic characters

Planting unit

AcheneAchene:
A dry, hard, one-chambered, one-seeded indehiscent fruit, as in buckwheat (Fagopyrum) or sunflower (Helianthus). The fruit wall is not united with the seed coat.

Shape

ObovateObovate:
Inverted egg shaped with apical end the broadest.
; cross section is moderately triangular.

Size

  • Length: 2.5–3.5 mm
  • Width: 1.8–2.7 mm
  • Thickness: 0.8–1 mm

Color

Black and brown

Texture

Smooth or with small stipplesStipples:
Numerous small dots or specks.

Other structures

No bristles

Identification notes

The triangular cross section is usually compressed so that one side is much larger than the other two.

Noxious weed seed categories

Not listed

AOSA examination list

Not included

Nomenclature

Family

Cyperaceae

Valid name

Bolboschoenus maritimus (L.) Palla

Synonyms

Bolboschoenus maritimus (L.) Palla ssp. paludosus (A. Nelson) Á. Löve & D. Löve, nom. illeg.
Bolboschoenus maritimus (L.) Palla var. paludosus (A. Nelson) Dorn
Bolboschoenus paludosus (A. Nelson) Soó
Scirpus fernaldii E.P. Bicknell
Scirpus maritimus L.
Schoenoplectus maritimus (L.) Lye
Scirpus maritimus L. var. fernaldii (E.P. Bicknell) Beetle
Scirpus maritimus L. var. paludosus (A. Nelson) Kük.
Scirpus pacificus Britton
Scirpus paludosus A. Nelson
Scirpus paludosus A. Nelson var. atlanticus Fernald

Bolboschoenus maritimus. Achenes are smooth or with small stipples.
Bolboschoenus maritimus. Achenes are smooth or with small stipples.
Bolboschoenus maritimus. Achenes with no bristles.
Bolboschoenus maritimus. Achenes with no bristles.