achene obtusely triangular, partly 3-celled, enclosed in the indurated calyx.
Name from , a bug, and , resemblance; from the form of the achene.
Ovary 1-celled with a suspended ovule, becoming an achene; calyx none; aquatic herbs, with finely dissected whorled leaves.
Fruit usually an achene, compressed or 3–4-angled or -winged.
achene triangular, pointed with the persistent base of the style.
Calyx 6-parted or -cleft, colored, persistent about the achene.
The modified calyx-limb in Composit, forming a crown of very various character at the summit of the achene.
The nut or achene—a fruit with hard and dry walls, as the filbert and the acorn.
achene elliptical, closely invested by the dry and persistent compressed calyx.
The pappus consists of a tuft of simple hairs, most of which are longer than the achene.