Abstract
Countries in the Arabian Peninsula have undergone strenuous plant collections during the past two decades as part of enriching various Herbaria in the region or producing and updating the flora of the region. Recent botanical explorations in the southwestern parts of Saudi Arabia have yielded interesting specimens of two distinct taxa. Critical study of these specimens revealed that they belong to two genera previously not reported for the flora of Saudi Arabia. Descriptions and photographs of the newly reported taxa, viz. Encelia Adanson and Galinsoga Ruiz & Pay., both belonging to Asteraceae, are provided for easy identification. A brief account on the taxonomy and distribution of the two genera in Saudi Arabia are also provided.