Abstract

Earlier works on the family Pallaviciniaceae were confined to morphological and more frequently taxonomic treatesented Campbell and Williams (1914), Cavers (1903), Evans (1937), Farmer (1894) and Haupt (1918, 1943); and the most recent paper on the subject was a study of 5 species of New Zealand Pallavicinia by Hodgson (1965). More than 40 species of Pallavicinia have been described by various workers. Smith (1966) gave the first report on the conducting system of Pallavicinia lyellii and Symphyogyna circinata. This study summarizes the results gathered form observations on the regeneration of a Taiwan species, Pallavicinia longispina, and the effects of different media and different light sources upon the growth and the mode of branching of the thallus