Bramley, Jon (1997) Flowering in British Lemna: A rare, cyclic or simply overlooked phenomenon? Freshwater Forum, 7, pp. 2-6.
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: |
|Journal or Publication Title: ||Freshwater Forum|
|Page Range: ||pp. 2-6|
|Issuing Agency: ||Freshwater Biological Association|
|Uncontrolled Keywords: ||Aquatic plants; Life cycle; Life history; Lemnaceae, England|
|Item ID: ||4572|
|Depositing User: ||Hardy B Schwamm|
|Date Deposited: ||25 Nov 2010 13:28|
|Last Modified: ||29 Sep 2011 18:13|
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