VIRTUAL MYCOTA: NZ Fungi Identification: Marasmiellus bonii

Home About Mushrooms Simple key Genus (A-Z) Help

« Back

Marasmiellus bonii

Biostatus

Present in region - Indigenous. Endemic

Images (click to enlarge)


Owner: J.A. Cooper	Owner: B.P. Segedin	Caption: scale=1mm Owner: J.A. Cooper	Caption: scale=1mm Owner: J.A. Cooper
Caption: upper left caulocystidia. Middle top: surface cap cells. Upper right basidium. Lower left spores. Lower right ramealis cap hyphae. Owner: J.A. Cooper	Caption: Figs. 1-6. Marasmiellus bonnii: 1. basidiomes; 2. spores; 3. basidia; 4, cheilocystidia; 5. pileipellis elements; 6. stipitipellis elements. Magnifications: basidiome, bar = 10 mm; basidia, cystidia, pileipellis and stipitipellis elements, bar = 20 µm	Caption: scale=5mm Owner: J.A. Cooper	Caption: scale=2mm Owner: J.A. Cooper
Caption: spores and cheilocystidia Owner: J.A. Cooper	Caption: upper, cap hyphae, lower sub-pellis cells. Owner: J.A. Cooper	Caption: scale=2mm Owner: J.A. Cooper	Caption: scale=1mm Owner: J.A. Cooper
Caption: Dried type specimen Owner: Herb PDD	Caption: Dried type specimen Owner: Herb PDD

Article: Segedin, B.P. (1995). A new species of Marasmiellus from New Zealand. Documents Mycologiques 25(98-100): 437-440.
Description: Pileus 4-10 mm diam., gelatinous texture, pure white, downy, dry, radially grooved following the outline of the lamellae, margin slightly incurved, drying ochraceous to sepia, depending on age. Lamellae white, thick and fold-like, well-spaced, 1-2 series, 5-6 reaching the stipe in small basidiomes, 8-10 in larger ones, sparsely furcate to intervenose at a lower level. Stipe 8-15 x 2 mm, more or less central, white at apex shading through yellow brown and sepia to black at the base, dry, even in diameter, cystidiate, insititious, tough, stipes often remaining attached to the substratum when the rest of the basidiome has disappeared. Taste and smell unknown. Spore print unknown.
Spores 10-13 x 6-9 (11.9 x 7) µm, Q=1.7, ellipsoid, lacrymoid, sometimes humped on abaxial side in lateral view, hyaline, smooth, thin-walled, inamyloid, not dextrinoid, acyanophilic, with a distinct apiculus with a terminal, dark scar. Basidia 30-35 x 11-13 µm broadly clavate, clamped at the base, 2-, 3-,.or 4-spored, sterigmata short and fat, -3 µm long. Pleurocystidia absent. Cheilocystidia 30-40 x 6-11 µm, in the form of cystidioles, cylindrical to lageniform, sometimes nodulose at the apex, thin-walled, infrequent. Trama of sub-gelatinous, more or less parallel, narrow hyphae 3-4 µm diam. Subhymenium of filamentous, slightly coralloid hyphae. Context of narrow (2 µm.diam.) gelatinised, interwoven hyphae. Pileipellis of repent hyphae with well developed rameales to asterostromelloid structure, with short diverticulations 1 µm diam. Stipitipellis of narrow (-3 µm), brown, repent hyphae with short, hyaline, thin-walled, simple or shortly diverticulate projections. Trama of lamellae and stipe not dextrinoid.
Habitat: Habitat : On old dead leaves of New Zealand flax (Phormium tenax), growing in damp swampy areas.
Notes: M. bonii bears a strong resemblance to M. trabutii var.trabutii but differs in the rather smaller size of the basidiome, the shallow, distant, thick, fold-like lamellae, mainly in 1 series, smaller spores, more strongly developed rameales structure in the pileipellis, and shorter protuberances on the stipitipellis.