Myxospermy, a mechanism, where mucilage is produced upon being moistened, has been found in many species, and is frequently associated with species occurring in arid zones. There has been, however, little study on myxospermy with reference to rainfall amount. To analyze the ecological significance of myxospermy, a comparison was made with regard to mucilage producion and the capacity to hold sand particles of the achenes of 5 Artemisia species, i.e., Artemisia frigida, A. halodendron, A. sieversiana, A. sco...