urediumn.

1937 Nature 8 May 800/2 Forty-four days after the inoculation was made, we observed small uredia on the upper surface of several of the pustules.

1949 B. B. Mundkur Fungi & Plant Dis. vii. 155 Towards the end of the growing season the formation of uredia ceases and teliospores begin to appear.

1970 J. Webster Introd. Fungi ii. iv. 369 A single uredium may contain from 50,000 to 400,000 spores.

1937 Nature 8 May 800/2 The uredial and tetial stages have regularly occurred on the gramineous hosts, and the pycnial..and æcial stages on the common barberry.

1967 Trans. Brit. Mycol. Soc. 50 192 Aecia usually result from a fertilization process..but they may also originate from aeciospores and, thus, can be a repeating spore form (uredial aecia as in Cronartium and Coleosporium).