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Schoenoplectus tabernaemontani

Species category

Weed

Common name

softstem bulrush, great bulrush, soft-stem 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.

Size

  • Length 2–2.2 mm
  • Width 1–1.5 mm
  • Thickness 0.7–0.9 mm

Color

White to black

Texture

Shiny

Other structures

The 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.
 often has bristled hairs from the base.

Identification notes

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.
 has two rounded sides.

Noxious weed seed categories

Not listed

AOSA examination list

Not included

Nomenclature

Family

Cyperaceae

Valid name

Schoenoplectus tabernaemontani (C.C. Gmel.) Palla

Synonyms

Schoenoplectus lacustris (L.) Palla ssp. creber (Fernald) Á. Löve & D. Löve
Scirpus lacustris L. ssp. creber (Fernald) T. Koyama
Scirpus lacustris L. ssp. glaucus (Rchb.) Hartm.
Scirpus lacustris L. ssp. tabernaemontani (C.C. Gmel.) Syme
Schoenoplectus lacustris (L.) Palla ssp. tabernaemontani (C.C. Gmel.) Á. Löve & D. Löve
Schoenoplectus lacustris (L.) Palla ssp. validus (Vahl) T. Koyama
Scirpus lacustris L. ssp. validus (Vahl) T. Koyama
Scirpus tabernaemontani C.C. Gmel.
Scirpus validus Vahl
Schoenoplectus validus (Vahl) Á. Löve & D. Löve
Scirpus validus Vahl var. creber Fernald
Schoenoplectus validus (Vahl) Á. Löve & D. Löve ssp. creber (Fernald) Á. Löve & D. Löve
Schoenoplectus validus (Vahl) Á. Löve & D. Löve ssp. luxurians (Miq.) Soják

Schoenoplectus tabernaemontani. Achenes with two rounded sides and bristled hairs from the base.
Schoenoplectus tabernaemontani. Achenes with two rounded sides and bristled hairs from the base.
From Left to Right:  1. Bolboschencus robustus 2. Schoenoplectus americanus 3. Schoenoplectus tabernaemontani .  Schoenoplectus tabernaemontani is the smallest species shown in the photo. Achenes with straplike appendages from the base. 
From Left to Right:  1. Bolboschencus robustus 2. Schoenoplectus americanus 3. Schoenoplectus tabernaemontani. Schoenoplectus tabernaemontani is the smallest species shown in the photo. Achenes with straplike appendages from the base.