Persicaria genus in Turkish Mad?makgiller or Buckwheat family (Polygonaceae) is included the Polygonum now. Today, separated from Polygonum. In this study, Pe. hydropiperoides belonging to given as a new species for flora of Turkey. Specimens were collected Sancaktepe/ Pa?aköy (Istanbul). Adding species, number Flora reached 12 (13 taxa). Additionally, name, detailed description, locality data,...

A cryptic invader of the genus Persicaria has recently increased in damper, northern parts La Palma and Gran Canaria Canary Islands (Spain) locally behaves as an invasive species. Examination historical herbarium specimens showed this species to be present since 1960s same probably applies Palma. Up now, had been assigned Old World weed P. maculosa. However, morphologically, these plants clearl...

Pond populations in Cape Cod described as Persicaria puritanorum (≡ Polygonum puritanorum) have been treated by recent authors as a synonym of P. maculosa (≡ Polygonum persicaria) based on gross morphology. However, consistent differences in leaf and inflorescence features raise the question as to whether this is an extreme phenotype of P. maculosa, an ecotype of that species, or a distinct tax...

Meloidoderita polygoni n. sp. is described and illustrated from roots of smartweed (Polygonum hydropiperoides) from Beltsville, Maryland. This new species is similar to M. kirjanovae but differs especially in having larger spines on the cystoid bodies, females with the anus much closer to the vulva, and more posterior excretory pore. M. polygoni differs from M. safrica particularly in having fe...

Species differences in patterns of phenotypic plasticity may be an important aspect of adaptive diversity. Plasticity for functionally important root traits was studied in inbred field lineages of Polygonum persicaria and P. cespitosum (Polygonaceae). Replicate seedlings were grown in plexiglass rhizotrons under a range of constant and temporally variable moisture treatments. Plasticity was det...

Adaptive differences among species are often thought to result from developmentally constant trait differences that enhance fitness in alternative environments. Species differences in patterns of individual phenotypic plasticity can also have ecological consequences. Indeed, functionally related constant and plastic traits may interact to determine the phenotype’s adaptive value in particular c...

Here we examined species differences in perception and response to two distinct types of shade cue, reduced photosynthetically active radiation (PAR) with and without reduced red : far red ratio (R : FR), in Polygonum persicaria and Polygonum hydropiper, two closely related annuals of contrasting ecological breadth. We compared plasticity data for light-gathering traits from glasshouse experime...