achene


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achene

(əkēn`), dry, simple, one-seeded fruit with the seed attached to the inner wall at only one point. Achenes are indehiscent, i.e., they do not split open at maturity. The so-called seed of a sunflower is an achene; the shell is the wall of the fruit, and the true seed lies within. A strawberry consists of many achenes embedded in a fleshy receptacle.

Achene

 

a monospermous indehiscent fruit of angiospermous plants. An achene consists of two carpels with an inferior ovary; it has a dry, leathery pericarp (in Compositae and Dipsacaceae). Winglike processes, pappi, hooklets, and other formations often develop to promote distribution of the fruit. The achene of Dipsacaceae falls off with a sheath of concresced bracts; in some Compositae (cocklebur, globe thistle) the achene falls off with the sheath of the head.

achene

[ə′kēn]
(botany)
A small, dry, indehiscent fruit formed from a simple ovary bearing a single seed.
References in periodicals archive ?
Unlike most heteromorphic composites, achene morphology in H.
the rachilla disarticulates at the level of each glume insertion, and the dispersal unit is then formed by the glume, one rachilla internode and the achene (Barros, 1947; Larridon et al.
83 Treatments Number of 1000- Achene achene achene yield per head weight (t/ha) (g) [S.
On this specimen, we found one achene that was nearly mature.
Oil concentration and fatty acid composition of achenes of North American Helianthus (Asteraceae) species.
With the exception of Potamogeton achenes which were determined using the manuscript by Jessen (1955), subfossil seeds and achenes were identified using the text by Montgomery (1977).
2, with slightly larger leaves, 3-5 leaflets per leaf, leaflets broadly lanceolate, and with larger achenes (5.
2013) and that higher temperature during the achene filling period also affects oil composition (Harris et al.