On living leaves of (1) Lonicera japonica. Upper Hutt, 4 May 1953, A. J. Healey.

Fructifications, hypophyllous, arid, indeterminate, white, causing yellowish areas on the upper surface, originating from hyphae which emerge from the stomata and ultimately form a continuous layer of intertwined, hyaline, thin-walled hyphae. Probasidia terminal, thin-walled, soon collapsing. Meta-basidia cylindrical, straight or flexuous usually bent more or less parallel to the leaf surface, transversely 3-septate, to 50 x 5µm; sterigmata to 9 µm long. Basidiospores ovate-cylindrical, hyaline, apiculate, 8.5-11 x 5-6 µm. Germination by repetition, less commonly by germ tubes. Resting spores not seen.

Parasitic on leaves of Lonicera.

Gould, Iowa St. Coil. J. Sci. 19: 304, f. 1, 2. 305, f. 3,4. 306, f. 5-14. 310, f. 15-24. 311, f. 25-38. 313, f. 39-47. 1945; Martin. Stud. nat. Hist. la Univ. 19, (3): 110, f. 29. 1952.

Verrucose resting spores produced after the basidia on the same fructification have not been seen. Martin (1952, p. 90) commented that basidiospores from the type collection were slightly smaller than described by Gould. The range in basidiospore size in the above specimen agrees closely with that given by Martin.
Herpobasidium deformans was recorded from New Zealand, without description, by Brien & Dingley (1955, p. 30). The species has probably been introduced with its host.

TYPE LOCALITY:
Iowa, U.S.A.