Weinnmannia racemosa L.f. Wellington. Mt. Arawara, Tararua Ranges, 2,500 feet, July 1933, E.E.Chamberlain. Unknown Hosts. Wellington. Mt. Toko, Ruahine Ranges, 3,000 feet, Sept. 1933, E.E.Chamberlain; Orongorongo, June 1945, Unknown Collector. Canterbury. Lake Sumner, Aug. 1947, G.B.Rawlings. Otago. Mt. Cargill, Dunedin, Sept. 1932, Helen Dalrymple; Leith Valley, Dunedin, April 1933, Helen Dalrymple; Same Locality, April 1937, J.R.J.More.

Hymenophore annual, solitary or growing caespitose from a common base, laterally attached by a short stem 3-4 mm. x 2-4 mm., sometimes growing from a stem-like elongation of the upper surface, occasionally dimidiate and attached by a broad base, firm but brittle, entirely white when fresh, drying cream. Pileus shell-shaped, spathulate, bell-shaped or occasionally applanate, 1-3.5 cm. x 1.5-2 cm. x 1-2 mm.; surface white, becoming cream, smooth, dull, sometimes obscurely sulcate, cuticle 30-40 µ thick, of compacted hyphae with ends upturned and arranged in a close palisade; margin thin, acute, interned, entire or when old crenate or toothed; hymenial surface plane or concave, even, white, drying cream, dissepiments not toothed. Context white, 0.25-1 mm. thick, densely woven, separated from the pores by a delicate wood-coloured woven layer; generative hyphae 6-10 µ thick, lumen 2-3 µ, freely branched, septate, staining, clamp connections present, small. Pores round or angular, 0.2-0.5 mm. deep, white in section, 100-150 µ diameter, or 6-7 per mm.; dissepiments 50-150 µ thick, mostly 100 µ, of woven mainly parallel hyphae, slightly tapering, apex delicately velutinate. Basidial type merulioid, basidia cylindrical, 6-8 x 2-3 µ, arranged in a dense persistent palisade. Spores allantoid, 3-3.5 x 1-1.5 µ, smooth. hyaline.

New Zealand.

Growing on bark and decorticated wood of dead branches, usually solitary, sometimes caespitose, occasionally dimidiate.

The species is not closely related to others in this region possessing a monomitic hyphal system. It may be recognised readily by the merulioid basidial type, allantoid spores, glassy thick-walled intricately woven hyphae, definite though delicate cuticle, and white pileus. The lateral stem may be reduced to an expansion of the base, or lacking when plants are dimidiate and sometimes imbricate.

[Notes from Kew Type specimen, PRJ 2010] Kew images.