. The rusts of Australia, their structure, nature, and classification . R. , Go; SWEET BRIAR, RASPBERRY, AND FLAX RUSTS. 240 Explanation of Plates. Fig. PLATE J. AECIDIUM on DANTHONIA. 39. Leaves with aecidia in dense clusters 40. Cluster of aecidia on leaf ... 41. Section of aecidium showing peridial wall and spores in chains 42. Chain of aecidiospores 43. Single spore detached and more or less rounded 44. Pseudoperidial cells seen from the surface ... nat size x 15 X 50 ... X 1000 ... X 1000 ... X 550 PLATE J. 42 C. C£rMlcbank,Dd 44

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