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

OvalOval:
Broadly elliptic.

Size

• Length: 2–4 mm
• Width: 1.9–3 mm
• Thickness: 0.4–0.6 mm

Color

Brown

Texture

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.
is smooth. Papery perigyniumPerigynium:
The saclike bract that subtends the pistillate flower of sedges (Carex), which in fruit becomes a flask-shaped envelope surrounding the fruit (achene).
covers 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.
.

Other structures

PerigyniumPerigynium:
The saclike bract that subtends the pistillate flower of sedges (Carex), which in fruit becomes a flask-shaped envelope surrounding the fruit (achene).
is ellipticElliptic:
Outline of an ellipse; greatest width midway sloping to an equally pointed apex and base.
and ribbed.

Family

Cyperaceae

Valid name

Carex bicknellii Britton

Synonyms

Carex bicknellii Britton var. bicknellii 
Carex brevior (Dewey) Mack. var. crawei (W. Boott) B. Boivin