Castle, H/ Kubsch, F 1949: The production of usnic, didymic, and rhodocladonic acids by fungal component in the lichen Cladonia cristatella. - Arch. Biochem.23(1): 158-159. [RLL List # 1 / Rec.# 3022] Keywords: CLADONIA CRISTATELLA/ MYCOBIONTS/ CHEMISTRY/ USNIC/ DIDYMIC/ CULTURE/ RHODOCLADONIC