New Zealand; North 1.: Auckland: Mt Eden, 16a Landscape Rd., B. P. Segedin, 4.II.1989, PDD 60260 (holotypus).

Pileus 3-10 mm diam., sub-orbicular to reniform, drab, smooth and translucent when wet, drying white, pubescent, surface tessellate, following the outline of the lamellae, margin conspicuously inrolled, even. Hymenophore whitish, drying apricot to orange-yellow, with 6-8 main lamellae attached to the stipe, thick and fold-like, forked, larger basidiomes having interconnecting cross veins, usually at a lower level than the main veins. Stipe very short, 2-3 x I mm, fawn, central or excentric, usually geotropically curved, fibrous, surface fibrillose, sometimes attached to the substrate with a dark pad of mycelium, connecting to white rhizomorphs on the substratum. Smell slightly of ammonia and taste unknown. Spore print unknown.
Spores 8.5-12.0 x 6-7 (9.0 x 6.2) µm, Q = 1.4, broadly ellipsoid to ovate in frontal view, in lateral view often flattened on the adaxial side and bulging on the abaxial side, hyaline, inamyloid, not dextrinoid, acyanophilic, thin-walled. Basidia 25-35 x 4-7 µm, clavate, 4-spored, sterigmata 3-5 µm. Cheilocystidia 30-60 x 4-8 µm, cylindric, sometimes slightly flexuous or narrowly clavate, hyaline, thin-walled, forming a sterile, lamellar margin. Pleurocystidia absent. Trama of narrow (2-3 µm) hyphae hyaline, glassy, with gelatinised walls, subregular. Subhymenium scarcely distinguishable, of narrow, gelatinised hyphae. Context of narrow (2-4 µm) hyphae, interwoven, more strongly gelatinised than the trama. Pileipellis of repent hyphae, -5 µm diam., with upstanding, strongly nodulose, diverticulate hyphae forming a Rameales structure. Stipe cortex of parallel hyphae -3 µm diam. with nodulose, diverticulate caulocystidia less complex than those on the pileus.

Gregarious on dead culms of Pseudosasa japonica (Steudel) Nakai (bamboo), in suburban garden.

Pileus 3-10 mm, suborbicularis vel reniformis, infuscatus, laevis, pellucidus ubi madidus, albus ubi aridus, pubescens, tessellatus in superficie, secundum imaginem lamellarum. margine manifeste involuta, planus. Hymenophorum subalbidum ubi madidum, armeniacum vel fulvum ubi aridum, cum lamellis 6-8 principibus stipiti adnexis, crassis et velut plicatis, furcatis. Basidiomata maiora ornantur venis transversis inter se iungentibus, plerumque subter venis principibus. Stipes perbrevis. 2-3 x 1 mm, bubalinus, entrails vel excentricus, plerumque geotrope curvatus, fibrosus. fibrillosus in superficie, nonnumquam substrate adnexus, interveniente nigro mycelio, albis rhizomorphis in substrato coniunctus. Paullum uream olet, sapore ignoto. Sporae imago ignota. Sporae 8.5-12.0 x 6-7 (9.0 x 6.2 µm), Q = 1.4, late ellipsoideae vel paullum ovatae aspectu frontali, aspectu laterali saepe parum complanatae in latere adaxiali, in abaxiali protuberantes, hyalinae, inamyloideae, nec dextrinoideae nec cyanophilae, parietibus tenuibus. Basidia 25-35 x 4-7 µm, clavata, tetraspora, sterigmata 3-5 mm. Cheilocystidia 30-60 x 4-8 µm, cylindrica, nonnumquam parum flexuosa et anguste clavata, hyalina, parietibus tenuibus, marginem sterilem lamellarum formantia. Desunt pleurocystidia. Trama ex angustis (2-3 µm) hyphis, hyalinis, vitreosis, parietibus gelatinatis, subregularis. Subhymenium vix distinguibile, ex hyphis angustis et gelatinatis. Contextus ex angustis (2-4 µm) hyphis, intertextis, gelatinatior quam trama. Pileipellis ex hyphis repentibus, -5 µm diam., cum hyphis rectis valde nodulosis, diverticulatis in structuram Ramealem. Stipitis cortex ex hyphis parallelis -3 µm diam., cum caulocystidiis nodulosis, diverticulatis, simplicioribus quam pilei. Gregarie in culmis bambusae mortuae, Pseudosasa japonica (Steudel) Nakai, in horto suburbano. Nova-zelandia.

ETYMOLOGY:
The name reflects the finely fimbriate margin of the lamellae when examined with a hand lens.
Several species of Campanella have been described from bamboos in other parts of the world. Since bamboos are not represented in the indigenous flora of New Zealand, it would seem likely that this fungus could also have been introduced. However, it does not seem to fit the descriptions of any of the species that have been described so far from bamboos in other countries. C. cucullata (Jungh.) Lloyd (syn. C. junghuhnia (Mont.) Sing.), often but not always on bamboo, has a white, thin-fleshed and dorsally attached basidiome, with inconspicuous cystidia. The species recorded in Japan  (Imazeki et al. 1988) as C. junghuhnia is white, translucent, and dorsally attached. C. cucullata has been described many times from various countries: Japan, Philippines, Samoa, Australia, and E. Africa (Parmasto 1981). There is some confusion in the literature about this species, particularly in regard to the size of the spores, and some workers believe C. cucullata and C. junghuhnia are either not synonymous or another species is involved (Pegler 1977; Parmasto 1981). C. aeruginea, common on bamboo in the Neotropics (Guzman & Guzman-Davalos 1985), is also estipitate, white turning glaucous, and has ampullaceous cystidia. C. castaneipes Sing. has a chestnut-coloured stipe with conspicuously thick-walled caulocystidia. Tetrapyrgos austrochilensis (Sing.) Horak, T. peullensis (Sing.) Horak (Singer 1969), and the related species T. alba (Berk. & Curt.) Horak also occur on bamboo but have triangular to star-shaped spores.

HOLOTYPUS: PDD 60260.