High Quality Content by WIKIPEDIA articles! An achene (Greek , a, priv. + , chainein, to gape; also sometimes referred to as akene and occasionally achenium or achenocarp) is a type of simple dry fruit produced by many species of flowering plants. Achenes are monocarpellate (formed from one carpel) and indehiscent (they do not open at maturity). Achenes contain a single seed that nearly fills the pericarp, but does not adhere to it. In many species, what we think of as the "seed" is actually an achene, a fruit containing the seed. The seed-like appearance arises from the fact that the wall of the seed-vessel hardens and encloses the solitary seed so closely as to seem like an outer coat. Typical achenes are the fruits of buttercup, buckwheat, and cannabis. The achenes of the strawberry are familiar, where the "seeds" are achenes. Technically, the strawberry is an aggregate fruit with an aggregate of achenes, and what is eaten is accessory tissue, so this is an aggregate accessory fruit.

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