The life-cycle of heteroecious species of Puccinia

Abstract

1. Puccinia culmicola DIET. Aeciospores of Aecidium Berberidis-Thunbergii P. HEXN. on Berberis Thunbergii DC. var. Maximowiczii FRANCH. et SAV., obtained from three different localities, were inoculated on wheat, but no infection was noted. Telia on Agropyron semicostalum NEES. (Fig. 1) were used to inoculate the barberry. Two weeks after sowing, abundant pycnia developed, being followed by aecia three weeks later (Fig. 2). Remarkably, the mature pycnia smell of putrid fish or glue. Inoculations on the leaves of Agropyron and rye from these aecia produced uredia, quite, identical with those of Puccinia culmicola DIET. On this account and from its morphological resemblance it may be stated that P. culmicola represents a form of P. graminis PERS.2. Puccinia Zoysiae DIET. Telia of this rust on Zoysia japonica STEUD. were sown on Paederia chinensis HANCE. After twenty-four days accia, to be identified with Aecidium Paederiae DIET. (Fig. 3) were obtained.