270 Explanation of Plates. 



PLATE LIV. 



{All Figures x 500 unless otherwise stated.) 



SOROSPORIUM TUMEFACIENS. 



Fig. 



210. Smutted and sound heads of Stipa pubcscens R. Br. .:. „. nat. size 



211. Cross-section of inilorescence showing vascular bundles surrounded by spore- 



balls . . . . „ . . . ... X 4 



212. Spore-balls .. . _ . . x 250 



213. Spores. 



214. Spore germinating in water, and showing septate branching promycelium bearing 



lateral and terminal conidia. 



SOROSPORIUM SETARIAE. 



215. Smutted and partially smutted heads of Setarin glauca Beauv. .. nat. size 



216. Cross-section of inflorescence, showing spore-balls around vascular bundles x 12 



217. Spore-balls . - ■ . • x 250 



218. Spores. 



