Abstract
Persicaria lankeshanensis, a new species of Polygonaceae from the Lankeshan Nature Reserve, Guangdong province of China, is described and illustrated. Persicaria lankeshanensis is similar to P. taquetii but differs from the latter by having stems, leaves, and ocreae densely pubescent, pedicels shorter than bracts, smaller flowers and achenes, and achenes opaque and minutely granular-striate. A comparison of achenes, pollen and abaxial leaf epidermis between the two species is provided.DOI: http://dx.doi.org/10.3329/bjpt.v21i2.21353Bangladesh J. Plant Taxon. 21(2): 147-152, 2014 (December)
Highlights
Persicaria [Tourn.] ex Mill. contains c. 150 species of prostrate or twining annual or perennial herbs, and are distributed mainly in northern temperate and tropical regions (Brandbyge, 1993)
After critical study we recognized it as a new species, Persicaria lankeshanensis sp. nov
For scanning electron microscopy (SEM) observations, samples of achenes and pollen were removed from mature fruits and unopened flowers, respectively, from the herbarium specimens
Summary
Persicaria [Tourn.] ex Mill. contains c. 150 species of prostrate or twining annual or perennial herbs, and are distributed mainly in northern temperate and tropical regions (Brandbyge, 1993). During a field trip in September 2009 in the Lankeshan Provincial Nature Reserve in Guangdong Province of China, a slender Persicaria with completely interrupted spike-like inflorescence, densely pubescent stems, leaves, and ocreae, and tiny flowers and fruits was collected. After critical study we recognized it as a new species, Persicaria lankeshanensis sp.
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