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: 1.7–3 mm
• Width: 1.5–2 mm
• Thickness: 0.3–0.5 mm

Color

Purple

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.
with fine lines of reticulations; 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 multi-ribbed.

Family

Cyperaceae

Valid name

Carex aquatilis Wahlenb.