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Text-figs. 1, H, and 3. Plate 23, A.
Receptacula parva alba vel cremea cum crescunt, aetate brunneola vel sub cremea, ramosa dendroidea, ramulis attenuatis: sporis 9–15.5 × 5–7μ hyalinis vel albis, levibus, oblongo-cylindricis, apicibus obtuse curvatis vel attenuatis; basidiis 2–4 sporatis, ad apicem septo transverso divisio, parte apicali dein longitudinaliter et cruciatim septate quaque parto gignente magnum erectum sterigma: hyphis haud inflatis, 2.5–4μ latis, fibulis, crasse tunicatis.
Type: No. 242, Keith George Memorial Park, Wellington, New Zealand, Junius, 1949, ad terram sub Beilschmeidia tawa.
Distribution: Wellington District and Maitai Valley, Nelson (No. 310, July 1949), New Zealand.
Text-Fig. III.
Tremellodendropsis transpusio … type collection. Basidia showing transverse septation of young basidia, followed by longitudinal septation and sterigmata formation; hyphae showing clamps and slightly thickened wall.
Plants –2.5 cm., colour off-white to ivory yellow, flesh tough, subgelatinous when fresh, drying rapidly to a horny brittle structure, pale fuscous to creamy fawn; solitary or gregarious, arising from a small round patch of mycelium on the bare clay soil; stem variable –0.5 cm. × 1 mm. at base, expanding before branching, sometimes quite flattened: branched 2–4 times, polychomotously at first, with a final dichotomy; lax dendroid habit with tips tapering to a fine point, hyphal ends giving a slight hairy appearance to tips.
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Spores 9–15.5 × 5–7μ, white, smooth walled, granular, contents aguttate to once or twice guttulate, oblong-cylindrical to slightly sigmoid-oblong, apex obtusely rounded or tapered, apiculus prominent. Germinating spores present with germ tubes developed –20μ long.
Basidia (2-) 4 spored, 30–60μ long × 8–10μ wide; a transverse septum cuts off the apex of the young basidium –20μ back; the protoplasm is usually congregated in this region leaving the long stalk portion empty; longitudinal septation then follows, starting at the apex and extending down to the transverse septum to give a cruciately divided apex, each cell of which produces a well developed sharply pointed, erect but slightly spreading sterigmata 7–10μ long. Several anomalous basidia were found in which only one abortive sterigma was produced. Examples of basidial proliferation through clamp formation, somewhat similar to those described by Rogers for Sebacina (Mycologica 28, 1936, 347–362), were also found, but were not common. Branches extend from the clamp to form one celled sterigmatal units.
Hyphae monomitic, 2.5–4μ, wide, clamped, walls thickened 0.4–0.8μ, not inflated.
Tremellodendropsis transpusio var. minor var. nov.