FIGURE 4. Sesamothamnus leistneri, flower morphology. A in A new species of Sesamothamnus (Pedaliaceae) from Namibia and Angola

FIGURE 4. Sesamothamnus leistneri, flower morphology. A. Inflorescence showing one open flower, several flowers in different stages of development, and persistent styles (whitish, tipping blackish ovaries) of faded flowers following shedding of the corolla. B. Flowers, open and in bud; note both stamens and stigma positioned in mouth of the corolla tube, also the lack of a spur at the base of the tube. C. Flower showing style with bilobed stigma exserted about 10 mm from the mouth of the corolla tube. D. Distal part of corolla tube opened out to show the yellow inner surface of the tube, white filaments, and anthers positioned at the level of the corolla mouth. Photographs by W. Swanepoel (A, B, D) and A.E. van Wyk (C).