Morphological, numerical and chemical taxonomy of the genus Crataegus was studied in the East and northeast of Iran. More than 80 fresh specimens as well as 50 herbarium specimens from different localities were examind. Using vegetative and reproductive morphological characters an identification key is provided for all taxa. For numerical taxonomy 85 morphological characters were measured and t...

In this paper we initiate a taxonomic review of the genus Serina Gredler, endemic to the eastern slope of the Qinghai-Xizang Plateau, namely S Gansu, SW Sichuan, SE Xizang Autonomous Region and N Yunnan of China. We describe the genital anatomy for some species and the shell morphology for all known species: Serina belae (Hilber), S. cathaica Gredler, S. egressa Sturany, S. prostoma (Ancey), S....

Significance of low serum ferritin levels in the elderly Sir, Fortuitously, the letter by Joosten et al.' describing the receiver operating characteristic curve for serum ferritin coincided with the publication of the study showing the impact of ventilation/perfusion scanning on diagnostic precision in pulmonary embolism.2 In the PIOPED study the use of high probability lung scan as the decisiv...