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Issue: Vol. 728 No. 2: 12 Nov. 2025
Type: Article
Published: 2025-11-12
DOI: 10.11646/phytotaxa.728.2.2
Page range: 108-124
Abstract views: 129
PDF downloaded: 8

Persicaria tuminensis (Polygonaceae, Persicarieae), a new species of the section Echinocaulon from the wetland flora of the Tumen River valley

A.V. Zhirmunsky National Scientific Center of Marine Biology, Far Eastern Branch, Russian Academy of Sciences, ul. Palchevskogo 17, Vladivostok, Russian Federation
achene micromorphology diagnostic key Persicaria SEM Eudicots

Abstract

Persicaria tuminensis is here described as a new species belonging to the sect. Echinocaulon (Polygonaceae) from the lower Tumen River valley (Russian Far East). A description, original images, and a morphological comparison with the similar East Asian and American species are provided. P. tuminensis differs from the other species of this section by the entire, linear-lanceolate leaves, attenuate to the apex and the base, basally truncate, subrounded or barely subhastate; the ocreae, being are initially tubular but open in maturity, often lacerate, with a short-ciliated truncated upper margin; and the bracts subtending flower fascicles widely rhomboid to subrounded and funnelform, with a densely bristly outer surface and long-ciliated oblique upper margin. In addition to macro-morphology, the new species has differences in the achene surface pattern.

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How to Cite

Chubar, E.A. (2025) Persicaria tuminensis (Polygonaceae, Persicarieae), a new species of the section Echinocaulon from the wetland flora of the Tumen River valley. Phytotaxa 728 (2): 108–124. https://doi.org/10.11646/phytotaxa.728.2.2