Flowering in British Lemna: A rare, cyclic or simply overlooked phenomenon?

Bramley, Jon (1997) Flowering in British Lemna: A rare, cyclic or simply overlooked phenomenon? Freshwater Forum, 7, pp. 2-6.

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Abstract

It is largely presumed that reproduction in British Lemna, as in other British Lemnaceae, is almost entirely asexual, with new daughter fronds being produced from the side pouches of older mother fronds. Sexual reproduction is considered to be a rather rare event or even absent and because of this rarity the sexual features of Lemna, such as anthers and fruit, are often considered to be of little taxonomic value. It was with some surprise, therefore, that widespread flowering was observed in all British Lemna during the summer of 1995. Initial observations in Shropshire during June recorded flowers in minor and trisulca, with fruit production in trisulca. L.gibba, minor and minuta were noted as being in flower on several occasions in Kent, during July and August, probably fruit production occurring in both species. To what extent these events are truly representative of the sexual reproduction rate of British Lemna on a year-to-year basis, or simply reflect the unusually high summer temperatures of 1995, is unclear.

Item Type: Article
Title: Flowering in British Lemna: A rare, cyclic or simply overlooked phenomenon?
Personal Creator/Author:
CreatorsEmail
Bramley, Jon
Refereed: No
Journal or Publication Title: Freshwater Forum
Volume: 7
Page Range: pp. 2-6
Date: 1997
ISSN: 0961-4664
Issuing Agency: Freshwater Biological Association
Uncontrolled Keywords: Aquatic plants; Life cycle; Life history; Lemnaceae, England
Subjects: Ecology
Limnology
Item ID: 4572
Depositing User: Hardy B Schwamm
Date Deposited: 25 Nov 2010 12:28
Last Modified: 29 Sep 2011 16:13
URI: http://aquaticcommons.org/id/eprint/4572

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