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Herbarium specimen: Potamogeton pectinatus

Taxon:Potamogeton pectinatus L. ("Fennel Pondweed")
Other name:Naiadaceae: Potamogeton interruptus Kit.
Filed in taxon folder:Potamogeton pectinatus L. ("Fennel Pondweed")
Collected by:Mr Job Edward Lousley
Collection date:10/8/1930
Locality:Great Britain, VC14 East Sussex, Cuckmere Haven, TV59, Brackish pool near Cuckmere Haven, East Sussex
Institution:South London Botanical Institute (SLBI)
Image:Potamogeton pectinatus herbarium specimen from Cuckmere Haven, VC14 East Sussex in 1930 by Mr Job Edward Lousley.
fruits/flowers:mature flowers
notes:Ref B.2. The correct citation for these fine examples is P.pectinatus L.var diffusus Hagstr.f.interruptus (Kit) Asch. This plant was originally described as a species by P.Kitaibel in Schultes, Osterr. Fl. 1814, 328. Babington (Man.ed.3. 1851, 343) still regarded it as such and named it P.flabellatus. In 1864, however, Ascherson (Fl.Prov.Brand.1864, 666) reduced it to a variety P.pectinatus var.interruptus (Kit.) Asch., and it has rightly been regarded as a form of P.pectinatus by German and Swedish authorities since that date. Dr Hagstrom's masterly treatment of the innumerable forms of P.pectinatus shows conclusively that all these are included under one or other of his 2 varieties - ungulatus and diffusus. Most British forms belong to the later. In Mr. Lousley's sheet the very important wider lower leaves are admirably displayed, and the plant amply justifies its label - W.H.Pearsall.

Inferred details are marked.

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+Potamogeton pectinatusGB, VC14 East Sussex, Cuckmere HavenJob Edward Lousley10/8/1930BIRM

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This sheet was documented by volunteers from the herbarium@home project.

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Documented by hollyrebecca on 22nd April 2015.

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