臺灣天南星屬植物之觀察

Notes on the Arisaema of Taiwan

Natural environment plays an important role in the plant kingdom. The external morphology of plants may be more or less influenced by environmental factors. Sometimes the sex of a plant is affected. Take Arisaema plants for an example, these plants are quite sensitive to environmental conditions. For this reason, Dr. Nakai termed these plants paradioicus , which term is applied to a plant which bears female flowers only when it is well grown, and male flowers when not fully developed. So far as the writer knows, the following botanists are the only ones who have published reports concerning the sex problem in Arisaema, they are Hino, Maekwa and Schaffner.