Empleu'rum serrula'tum. -- Leaves sometimes mixed with buchu, occasionally constituting the main bulk; may be distinguished by their acrid taste, peculiar odor -- differing from buchu -- longer, narrower than even B. Serratifolia, sides parallel, apex acute and glandless, coarsely dentate (serrulate); when held up to the light lateral veins not as straight, shorter and less strongly developed; contain peculiar volatile oil .64 p.c., possessing characteristic odor. Properties considered to differ from those of bushu.