Boerhavia erecta L. (Nyctaginaceae): A new record to the flora of the Arabian Peninsula from Yemen

The Arabian Peninsula contains a rich and divers flora, which is still incompletely known. In the period on May 2009 – March 2014 have been conducted field studies and collections in the area of three districts are: Toor Al-Baha, Al-Maqatrah and Tuban, which are located in Lahej province, Southwestern Yemen. The result of these studies was recorded in the first time to the flora of the Arabian Peninsula, Boerhavia erecta L. (Nyctaginaceae). It was found at altitude between 95-840 m a.s.l., where it grows in roadsides, alluvial plains and borders of fields. B. erecta L. can be distinguished from B. diffusa L. by its obconical anthocarps which are completely glabrous, truncate at the apex with undulate ribs. Description, habitat, phytochory and figures of the species are given.