نتایج جستجو برای: potentilla
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Clausen, Keck and Hiesey’s studies of clonal transplants during the 1930s and 1940s are famous for demonstrating ecotypic variation. Less appreciated are their studies on natural selection, even though at the time there was little hard evidence of its operation in nature. Here we present new analyses of their study of natural selection in Potentilla (Clausen et al., 1940; Clausen and Hiesey, 19...
leaf anatomy of 27 species of potentilla l. (rosaceae), representing 9 sections and four related genera, especially tylosperma botsch., schistophyllidium (juz. ex fed.) ikonn., drymocallis fourr. ex rydb., and sibbaldia l. from iran were studied using light microscopy. the most outstanding characters of blade and midrib were measured. the result revealed a number of taxonomically important char...
گونه potentilla botschantzeviana ((syn: p. butkovii var. botschantzeviana (adylov) soják)) به عنوان گزارشی جدید از شمال ایران ارایه می شود. این گونه با دارا بودن دمبرگ هایی پوشیده از کُرک های راست- خوابیده یا گسترده؛ برگ هایی با تقسیم های عمیق و برگچه هایی با کُرک های تُنُک، افراشته – فر دار و نیز گل هایی به قطر 2/1 سانتی متر قابل شناسایی است. p. botschantzeviana دارای صفات ریخت شناسی (به ویژه خامه...
The aerial parts of selected Potentilla species (P. anserina, P. argentea, P. erecta, P. fruticosa, P. grandiflora, P. nepalensis, P. norvegica, P. pensylvanica, P. crantzii and P. thuringiaca) were investigated in order to determine their contents of polyphenolic compounds. The results showed that P. fruticosa has relatively high concentrations of tannins (167.3 +/- 2.0 mg/g dw), proanthocyani...
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