COMPOSITAE. Olearia ilicifolia: Westland, Douglas Rock, Copland Valley, 1,200 m. LAURACEAE. Beilschmiedia tawa: Auckland, Te Whaiti, 400 m. MIMOSACEAE. Albizzia lophantha: Auckland, Campbells Bay, 100 m. MYRTACEAE. Eucalyptus sp.: South Australia, Stirling. ROSACEAE. Prunus armeniaca: Otago, Earnscleugh Research Station, 200 m. Prunus cerasus: Otago, Alexandra, 200 m. Prunus persica: Auckland, Mt. Albert, 50 m. Pyrus malus: Hawke's Bay, Twyford, 10 m. SALICACEAE. Salix babylonica: Wellington, Turakina Valley, 70 m. Salix fragilis: Auckland, Mt. Albert, 50 m; Lake Whangapa, Rangiriri, 30 m. VIOLACEAE. Melicytus ramiflorus: Auckland, Mountain Road, Henderson, 250 m. UNKNOWN HOSTS. New South Wales, Sydney; Killeare. South Australia. National Park.

Hymenophore annual, ceraceous, adherent, composed of numerous small orbicular colonies 5-10 mm diameter which commence at lenticels, often becoming fused to form linear areas to 5 cm long; hymenial surface cream or pallid ochre, usually raised and darker towards the centre, becoming creviced; margin thinning out, pallid cream, finely byssoid, adherent. Context cream, 100-500 µm thick, basal layer stout, of compact parallel hyphae, intermediate layer of mainly erect hyphae, sometimes embedding masses of crystals; generative hyphae 3-4 µm diameter, walls 0.2 µm thick, naked, with clamp connections. Gloeocystidia arising from the intermediate layer, fusiform, ventricose, or obclavate, some flexuous-cylindrical, apices long-acuminate, some projecting slightly, 40-80 x 6-8 µm. Hymenial layer to 40 µm deep, a close palisade of basidia, paraphyses, and gloeocystidia. Basidia subclavate, 24-32 x 5-6 µm, bearing 2-4 spores; sterigmata slender, to 6 µm long. Paraphyses subclavate, 10-18 x 4-5 µm. Spores broadly elliptical, pip-shaped, or obovate, 6-9 x 3-4.5 µm, walls smooth or delicately irregularly verruculose, hyaline, 0.2 µm thick; sometimes adhering in pairs or fours.

DISTRIBUTION: Great Britain, Europe, North America, South Africa, Australia, New Zealand.

HABTAT: Bark of dead branches.

Diagnostic features are the usually orbicular colonies often commencing from lenticels, with cream, creviced surface; densely compacted parallel hyphae of the basal layer, somewhat loosely arranged erect hyphae of the intermediate layer sometimes embedding crystals, pip-shaped spores often adhering in fours, and obclavate gloeocystidia with long-acuminate apices extending to the surface of the hymenium. Several forms have been described as species. C. pruni is one with nonamyloid smooth spores, obclavate gloeocystidia with long acuminate apices, and a stout basal layer. Collections from apricot, cherry, and peach match this form. Collections from Albizzia and Beilschmiedia possess delicately granular-verruculose amyloid spore walls which Rogers & Jackson (1943, p. 302) described for the type form. Burt described C. vesiculosum from an old specimen in which gloeocystidia had collapsed, leaving cavities in the context, a condition not uncommon in old specimens at hand. Practically every section examined shows a somewhat different microstructure, consequently it is advisable to regard all as forms of one variable species, as Rogers & Jackson have done. In general, thick specimens have longer gloeocystidia and more of them in the lower portions of the context. Crystals may be present in or absent from different sections taken from the same specimen. A few lateral vesicles, similar to those of C. utriculicum have been noted in the base of the context in a few sections.

TYPE LOCALITY: Neotype from Glamis, Scotland (Wakefield, 1914).