Abstract: Desmodium heterovarpum DC var．strigosum Van Meeuwen is a perennial herb which is rare in Yunan County，Guangdong Province．It has high adaptability to sunshine which enables it to grow very well under shady conditions．Even in winter its leaves have relative high contents of chlorophyl1 and can sustain certain net photosynthetic rate．It also has an extensive root systems and dense canopy and its root bears some nodules which can fix atmosphere nitrogen．Those characters enable it to compete with weeds．It has multi-ecoloical functions．Then this herb has high application value in the utilization of local bloresources．