[GS] Pileus 1-2 cm. diam., dull white tinged fawn and green, orbicular to reniform with overlapping auricles, velvety to finely fibrillose; flesh thin, gelatinous, greyish. Gills adnate or radiating from point of attachment, distant, thick and soft. Stipe 2-5 X 1-2 mm., lateral, dark-green, fibrillose with fibrillose basal disc; or absent. Spores 8-10 X 4-5um non-amyloid, minutely rough, thin-walled (Fig. 1/45, p. 10). Hymenophoral trama and tissue of pileus of loosely woven hyphae embedded in mucilage. HABITAT: on fallen twigs, Levin, 27.10.1947, Stevenson; Nelson, 17.4.1956, Dorothy Read in Stevenson (type); & Keith George Park, Wellington, 26.6.1958, Stevenson. [EH] The almond-shaped spores (10.5-12 X 5.5-6 um), structure of the cuticle, and habit of the fungus, place this species in Delicatula rather than Resupinatus. [Segedin] = Campanella tristis. [JAC] Pileipellis stronly diverticulate, hyphae with hyaline zebroid encrustation, clamped. With thin-walled, variable cheilocystidia. Exactly agreeing with Segedin's redescription of C. tristis and the synonymy is confirmed.

K(M) 235135, Stevenson 1431. The type requires little further annotation. It is consistent with the current interpretation of this species. The gill edge is difficult to observe, being obscured by masses of agglutinate spores. There is some evidence for occasional cystidia similar to the pileipellis.

[Notes from Kew Type specimen, PRJ 2010] Other Stevenson collection in K, GS 1401

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

New Zealand: North l.: Wellington: Levin, G. Stevenson, 15 XI 1958, Stevenson 1431 (holotype K): Auckland: Waitakere Ra., Piha Valley Tr., J. M. Dingley, 10 vi 1971, PDD 29267; Hunua Ra., Cosseys Tr., B. P. Segedin, G. M. Taylor, 18 XI 73, PDD 60259: N. Auckland: Waipoua Forest, G. M. Taylor, B. P. Segedin, 6 v 1975, PDD 60254; Auckland: Waitakere Ra., Cascades Reserve Kauri Tr., B. P. Segedin, 26 IV 1977, PDD 60255; T. Yokoyama, 25 IV 1978, PDD 60256; La Trobe Tr., B. P. Segedin, 15 IV 1979, PDD 60257; Maungaroa Ridge Tr., B. P. Segedin, 21 II 1981, PDD 60258.

Description based on the type material, together with additional information from further collections
Pileus 4-30 mm diam., semi-orbicular to reniform, surface drab white, cream or pale grey, turning glaucous or greenish-grey and finally black with age, drying buff to ochraceous, moist, flabby to gelatinous in texture, translucent when wet, floccose when dry, surface tessellate, following outline of lamellae, margin inrolled. Hymenophore of well-spaced lamellae, simple or intervenose, white, becoming dingy, staining verdigris, greenish or black when aged, drying chrome. Lamellae attached to slightly decurrent when stipe obvious, thin, simple, in one series in smaller basidiomes, forking or strongly intervenose in larger ones, cross-veining usually slightly below the level of the radiating main veins. Stipe 2-3 x 1 mm, lateral or excentric, fibrous, downy fibrillose, straight or more often geotropically curved, even, sometimes attached to the substratum by pad of mycelium.
Spore print white. Smell none, taste unknown. Spores 8.0-10.5 x 5.5-7.0 (8.5 x 6.0) µm, Q = 1.4, somewhat variable in shape and size, broadly ellipsoid to humped on the abaxial side, hyaline, inamyloid, not dextrinoid, acyanophilic, thin-walled, sometimes with one large guttule or many, apiculus broad. Spores appear to shrivel easily developing the longitudinal ridges depicted by Stevenson (1964) for R. dorotheae. Basidia 20-35 x 5-10 µm, clavate, with 4 sterigmata 4.5 µm long. Cheilocystidia on the lamellar margin 30-40 x 3 µm, versiform but basically clavate, sometimes with various short protuberances, in clusters of 3-6 but not very plentiful. Pleurocystidia absent. Trama of hyaline, strongly gelatinised, interwoven hyphae up to 4 µm diam., with conspicuous, medallion clamp connections. Subhymenium narrow, of closely interwoven hyphae, somewhat gelatinised. Context of thin, gelatinised, interwoven hyphae like the trama. Pileipellis an indistinct cutis of irregularly arranged, repent, sometimes faintly encrusted hyphae giving rise to curving, erect, diverticulate hyphae in a Rameales to asterostromelloid structure, hyaline to stramineous in colour, sometimes with resinous incrustations to which spores readily cling. Subpellis faintly yellow in KOH. Stipe cortex of narrow (2µm diam.) hyphae producing numerous caulocystidia of Rameales structure, golden brown in ammonia. Chemical reactions; KOH on pileus gives a brownish colour, phenol gives a darker than natural verdigris tinge.

Caespitose and gregarious on dead wood of the indigenous species Beilschmiedia tawa (A. Cunn.) Benth. & Hook. f. ex Kirk (tawa), Geniostoma ligustrifolium A. Cunn. (hangehange), Rhipogonum scandens J. R. & G. Forst. (supplejack), Kunzea ericoides (A. Rich.) J. Thompson (kanuka), Freycinetia baueriana Endl. ssp. banksii (A. Cunn.) Stone (kiekie), in mixed podocarp-dicotyledonous forest.

This species has strong affinities with the fungi described in Singer's subsection Aerugineae (Singer 1975), which are either always glaucous in colour or become so with age. It is very close to the South American species C. aeruginea Sing. (Singer 1975), differing in having basically clavate rather than ampullaceous cheilocystidia and not being confined to monocotyledonous hosts. Singer stated that C. aeruginea has no stipe or pseudostipe, but many specimens of C. tristis are estipitate with age. C. aberrans Sing., also from South America (Singer 1975), differs in being permanently glaucous and having no cystidia. C. merulina (Pers.) Sing. has been described both by Singer (1975), from South America and by Guzman & Guzman-Davalos (1985), from Mexico, and although their accounts differ in some respects, both agree about small size of the spores (7-8 x 3-6 µm) and capitate cheilocystidia. Another species belonging to this group, C. caesia Romagnesi (Romagnesi 1980), has a very small, sessile, glaucous basidiome on herbaceous host and is possibly the same as C. merulina (Singer 1986).

Pileus 1-2 cm diam., dull white tinged fawn and green, orbicular to reniform with overlapping auricles, velvety to finely fibrillose; flesh thin, gelatinous, greyish. Gills adnate or radiating from point of attachment, distant, thick and soft. Stipe 2-5 x 1-2 mm, lateral, dark-green, fibrillose with fibrillose basal disc; or absent. Spores 8-10 x 4-5 µm, non-amyloid, minutely rough, thin-walled (Fig. 45). Hymenophoral trama and tissue of pileus of loosely woven hyphae embedded in mucilage.

On fallen twigs, Levin, 27.10.1947, Stevenson; Nelson, 17.4.1956, Dorothy Read in Stevenson (type); & Keith George Park, Wellington, 26.6.1958, Stevenson.

Pileus 1-2 cm diam., albidus, hinnuleus et viridi-tinctus, orbicularis usque reniformis, auriculis imbricantibus, velutinus usque subtiliter fibrillosus; caro tenuis, gelatinosa, subgrisea. Lamellae adnatae vel ex origine adnectente radiantes, distantes, crassae, molles. Stipes 2-5 x 1-2 mm, lateralis, fusco-viridis, fibrillosus, cum disco basali fibrilloso; vel nullus. Sporae 8-10 x 4-5 µm, haud amyloideae, minute rugulosae, parietibus tenuibus. Trama hymenophoralis et pilei textura ex hyphis laxe intertextis in mucilagine immersis sistens.

A specimen of this exists in the Kew Herbarium, Colenso 749 (no locality), labelled Ag. Pleurotus scabriusculus junior, which is a distinct species, see below.

Typus: D. Read in Stevenson 1036.

Pileus 1.5-3 µm diam., creamy-fawn with greenish tinges, orbicular to reniform, subfibrillose to velutinate; flesh thin; laterally attached. Gills creamy, moderately thick, distant and shallow with gill-like folds between. Spores 9 x 5-6 µm, non-amyloid, thin-walled (Fig. 44). Hymenophoral trama more or less regular, with some thick-walled hyphae. Cuticle of loosely woven hyphae, 2-3 µm diam., with clamp connections, mostly thin-walled, gelatinized.

On standing dead Beilschmiedia, Levin, 15.11.1958) Stevenson (type).

Pileus 1.5-3 µm diam., cremeo-hinnuleus viridulo-tinctus, orbicularis usque reniformis, subfibrillosus usque velutinosus, lateraliter adnexus; caro tennis. Lamellae cremeae, modice crassae, distantes, haud altae, plicis lamelliformibus interspersis. Sporae 9 x 5.6 µm, haud amyloideae, parietibus tenuibus. Trama hymenophoralis plus minus regularis, hyphis nonnullis cum parietibus crassis. Cuticula ex hyphis laxe intertextis sistens, 2-3 µm diam., cum fibulis, parietibus plerumque tenuibus gelatinatis.

When collected this fungus was dry and papery but it is probably gelatinous when fresh.

Typus: Stevenson 1431