抄録
Microscopic observations of ashed tissues provided by the low-temperature plasma ashing of plant leaves and other specimens have been extensively applied in plant taxonomical and morphological studies. In the present work, calcium oxalate crystals in the ashed tissues were taken up for the identification of the crude drug, "Uvae Ursi Folium", the analogous drug "Vitis-Idaeae Folium, " and other closely related plants involving Gaultheria miqueliana TAKEDA, Gaultheria adenothrix (MIG.) MAXIM., and Vaccinium uliginosum LINN. "Uvae Ursi Folium" has been characterized by solitary crystals and crystals sands deposited along the netted vein in extremely high density, while practically no crystal has been observed other than along the vein. In "Vitis-Idaeae Folium", clustered crystals are irregularly arranged in low density almost only along the costa. Gaultheria miqueliana TAKEDA contains clustered crystals distributed homogeneously in the ashed tissue with low density. Gaultheria adenothrix (MIG.) MAXIM. has been characterized by clustered crystals deposited along the costa in high density. No crystal has been found in the ashed tissue of Vaccinium uliginosum LINN. under crossed Nicols.
