achene


Also found in: Dictionary, Thesaurus, Medical, Wikipedia.

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 ?
non-volatile vegetable) oil in the achenes ("seeds"), and this additional dimension of variability caused by human selection will be examined in the "Evolution of Seed Oil Production Under Domestication" section.
A pappus's attachment to its achene is weak, a feature allowing for easy separation between the two units.
We examined anthocarps with a light table to verify presence of an achene prior to planting.
mirabile is more delicate and lax, and has longer achene stipes, straighter dorsal achene margins, and shorter filaments (Small, 1900; Keener, 1976).
An achene was considered germinated following emergence of the radicle and coleoptile, which usually occurred simultaneously.
Hemp is of high nutritional quality because it contains high amounts of unsaturated fatty acids, mostly oleic acid (18:1; 10-16 % content in the achenes, depending on strain), linoleic acid (18:2; 50-60 %), alpha-linolenic acid (18:3; 2025 %), and gamma-linolenic acid or GLA (18:3; 1-6 %).
This species looks to be the most successful in the view of the number of achenes per 1 [m.
Achene tuberculate and papillate; glabrous; hypogynium with 6 globose tubercles in distinct pairs 3.
The feces contained no seed fragments apart from what appeared to be remains of the achenes of an Asteraceae species in one sample.
30, divergent selection for achene shattering in ruderal plants and achene retention in domesticated plants is a second principal dimension of disruptive selection in Cannabis (reflective of a more general disruptive selection for existence in cultivation or existence in nature).
hallii in Mason County in 2000 while conducting a study on achene morphology for the species (Smith et al.
Like nearly all other Nyctaginaceae, the fruit is an achene, surrounded by an "anthocarp," a persistent accessory fruit that develops from the lower part of the uniseriate perianth.