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 ?
The anatomy, morphology and germination behavior of the achenes is key to the survival of wild hemp.
Nevertheless, after that admission, all of the disseminules/diaspores in the arrangement (whether aril, achene, or true seed) are collectively called "seeds.
In our laboratory experiment, germination was highest when achenes were scarified and subjected to warm followed by cold stratification.
Effect of basal and side dressed phosphorus on the achene yield and pyrethrins concentration in the achenes of Pyrethrum (Tanacetum cinerariifolium) and on soil and plant phosphorus.
Achene maturity was a few days later, and, on average, more achenes were produced per inflorescence at WH compared to SB.
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.
Achenes tuberculate, or pitted, rarely also pubescent.
At the end of the experimental period, all capitula were bagged, preventing access by insects and, at the end of the reproductive season, fruits were collected and number of achenes per capitulum was recorded as a measure of reproductive success.
Its feces also contained large numbers of intact seeds of Kyllinga brevifolia, which is dry-fruited, but the defecated seeds lacked the membranous pericarp around the achene.
Germination response patterns to temperature during afterripening of achenes of four Texas winter annual Asteraceae.
Regarding achenes ("seeds"), diagnostic for varieties: Only substantially mature achenes exhibit the identification characteristics clearly.