achene

Name from , a bug, and , resemblance; from the form of the achene.

Calyx 6-parted or -cleft, colored, persistent about the achene.

Fruit usually an achene, compressed or 3–4-angled or -winged.

Compared with U. dioica, this achene is thinner and shorter.

Achene triangular, pointed with the persistent base of the style.

The nut or achene—a fruit with hard and dry walls, as the filbert and the acorn.

The pappus consists of a tuft of simple hairs, most of which are longer than the achene.

Fruit a circumscissile 2-celled capsule, with one or more peltate seeds in each cell, or an achene.

Ovary 1-celled with a suspended ovule, becoming an achene; calyx none; aquatic herbs, with finely dissected whorled leaves.

Achene (commonly solitary) enclosed in the 4-angled dry and thickish closed calyx-tube.