TH TAXONOMIC STUDY FOR GENUS HELIOTROPIUM L. (BORAGINACEAE) IN TWO DISTRICTS TUBAN AND AL-MUSEMIER, LAHEJ GOVERNORATE, REPUBLIC OF YEMEN

Abstract

This current study deals with the Heliotropium L., in two districts (Tuban and Al-Musemier), Lahej governorate, Yemen. During the period from August 2020 to March 2023, The present study recognized 7 species are: H. bacciferum, H. europaeum, H. longiflorum var. longiflorum, H. ovalifolium, H. pterocarpum, H. ramosissimum and H. strigosum. H. longiflorum var. longiflorum endemic to Arabia Peninsula. The vegetative and reproductive characters proved that they are with high taxonomic values in identification and classification at the level of species, long of inflorescence, fruitlet with or without wing, numbers of fruitlets (2 or 4-nutlets), present or absent hairs are with high taxonomic values in identification and classification at the level of species of Heliotropium.