مراجعة تصنيفية لـجنس الـ Grewia (Grewioideae) من الفصيلة الخبازية بمفهومها الواسع .Malvaceae s.l في مديرية طورالباحة محافظة لحج اليمن

Abstract

The current study presents morphological characteristics of Grewia, belonging to family Malvaceae s.l., in Toor Al-Baha district, Lahej Governorate, Yemen, from August 2020 to September 2023, Plant specimens were collected from different habitats in Toor Al-Baha district, and herbarium specimens were kept in the author's herbarium, 86 specimens were studied for seven species. An introductory order deals with the most significant features, synonyms, local names, and distribution in the study area, in addition to a key to distinguish between seven species belonging to the genus of Grewia in the studied area, and up-to-date nomenclature for all studied taxa are presented, by using the modern classification of Malvaceae which referred to sub-family is Malvoideae, within family Malvaceae s.l. and family Tiliaceae, which refers to the sub-family Grewioideae.
The vegetative and reproductive morphological characters proved that they are with high values in segregation between them. According to morphological characteristics, the seven taxa of Grewia are divided into two groups are (G. erythraea, G. tenax, and G. tembensis var. ellenbeckii), having white petals and 2˗4 drupes, while the second group comprising G. arborea, G. schweinfurthii, G. tristis and G. velutina within yellow petals and 1˗2 drupes. G. schweinfurthii was distinguished by having red bracts around all flowers compared to the rest of the species studied.