Authors: C. Stace, R. van der Meijden (ed.) & I. de Kort (ed.)
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Scientific name:

Polycarpon tetraphyllum

Vernacular name:

Allseed, Four-leaved


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Four-leaved Allseed

Scientific name: Polycarpon tetraphyllum (L.) L.

Diagnostic features
Almost glabrous annual with erect to ascending much-branched stems to 25cm.
Leaves obovate, obtuse to rounded.
Flowers numerous, small and greenish.

Chromosome number: 2n=54.

Habitat
Native; open sandy and waste ground near sea.

Distribution
Channel Islands, Dorset, South Devon, Cornwall and Scilly, casual elsewhere.

This species is keyed out on Page 2106: Polycarpon and other genera in the Text Key.

Note
Plants with leaves only paired, contracted inflorescences, and stamens 1-3 (not 3-5) are distinguishable as Polycarpon tetraphyllum (L.) L. var. diphyllum (Cav.) DC. (Synonym: Polycarpon tetraphyllum (L.) L. ssp. diphyllum (Cav.) O. Bolòs & Font Quer).

Polycarpon tetraphyllum
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Allseed, Four-leaved
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