| name | Amanita mumura |
| name status | nomen acceptum |
| author | G. S. Ridl. |
| english name | "Blushing Maori Lepidella" |
| intro | The following description is based on Ridley (1991). |
| cap | The cap of Amanita mumura is 45 - 64 mm wide, convex to plano-convex, dry, with a white to buff center and an appendiculate margin. The volval remnants form complete, pulverulent, buff covering, occasionally completely lost in older specimens. The flesh is pale buff with some yellowing on exposure. |
| gills |
Gills are crowded, free, white, 8 mm wide; the short gills are attenuate. |
| stem |
Its stem is 50 - 100 × 10 - 32 mm, clavate to
sub-bulbous, hollow, smooth, buff with yellowish and sienna fulvous
stains. The volval remnants coat the lower stem and upper bulb in
pulverulent to sub-felted layer with buff with yellowish and sienna fulvous
stains. In a few specimens a complete "limbus internus" of the
volva is left circling the base of the stem. The ring is friable,
felted, disappearing in older specimens, buff to ochraceous. The flesh is pale buff with some yellowing on exposure.
The entire fruiting body becomes rosy buff on drying. |
| spores |
The spores measure (8-) 9 - 12 × (6-) 6.5 - 8.5 µm and are broadly ellipsoid to ellipsoid, occasionally elongate and amyloid. Clamps are present at bases of the basidia. |
| discussion |
Originally described from the North Island, New Zealand, associated with Southern Beech (Nothofagus), and Leptospermum. This species is apparently unique to New Zealand. Ridley felt that this species best belonged in Bas' (1969) stirps Grossa. Stirps Grossa previously included only taxa from Australia. It would appear that ancestral members of stirps Grossa may have pre-existed the break-up of Gondwana. The yellowing on the flesh when cut may not be a constant character. See the discussion of the yellowing syndrome under Amanita subsolitaria (Murrill) Murrill. Similar colors (yellow and rosy buff) were noted by Ridley on Amanita pareparina G. S. Ridl.—R. E. Tulloss |
| brief editors | RET |
| name | Amanita mumura | ||||||||||||||||||||
| author | G. S. Ridl.. 1991. Austral. Syst. Bot. 4: 345, fig. 10(a-h). | ||||||||||||||||||||
| name status | nomen acceptum | ||||||||||||||||||||
| english name | "Blushing Maori Lepidella" | ||||||||||||||||||||
| etymology | mumura (Maori), "blushing"; referring to the color of the basidiome on drying | ||||||||||||||||||||
| MycoBank nos. | 355198 | ||||||||||||||||||||
| GenBank nos. |
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| holotypes | PDD | ||||||||||||||||||||
| intro |
The following text may make multiple use of each data field. The field may contain magenta text presenting data from a type study and/or revision of other original material cited in the protolog of the present taxon. Macroscopic descriptions in magenta are a combination of data from the protolog and additional observations made on the exiccata during revision of the cited original material. The same field may also contain black text, which is data from a revision of the present taxon (including non-type material and/or material not cited in the protolog). Paragraphs of black text will be labeled if further subdivision of this text is appropriate. Olive text indicates a specimen that has not been thoroughly examined (for example, for microscopic details) and marks other places in the text where data is missing or uncertain. The following is based entirely on the protolog of the present species. Basidiomes small to medium; becoming rosy buff on drying. | ||||||||||||||||||||
| pileus | 45-64 mm, convex to plano-convex, pale fulvous sienna at margin, with disc white to buff, dry; context pale buff, with some yellowing on exposure; margin appendiculate with friable volval remnants; universal veil at first as complete, pulverulent, buff covering, occasionally completely eroded in older specimens. | ||||||||||||||||||||
| lamellae | free, crowded, white, 8 mm broad; lamellulae attenuate. | ||||||||||||||||||||
| stipe | 50 - 100 × 10 - 32 mm, smooth, buff with luteous and sienna-fulvous stains, context pale buff, with some yellowing on exposure, hollow; bulb slightly discernible or with stipe simply clavate; partial veil friable, felted, disappearing in older specimens, buff to pale ochraceous; universal veil coating lower stipe and upper bulb in pulverulent to sub-felted, adnate layer, pale buff with luteous and sienna stains, occasionally forming inferior “ring” (seen only in Taylor 1168). | ||||||||||||||||||||
| pileipellis | 250 – 340 µm thick, with gelatinized suprapellis and dense, non-gelatinized subpellis. | ||||||||||||||||||||
| basidia | 49 – 72.5 × 9 – 16 µm, 4-spored, clamped. | ||||||||||||||||||||
| universal veil | On pileus: with elements irregularly arranged; hyphae sparse to moderately abundant, hyaline, 6 - 13 um wide, occasionally finely encrusted; inflated cells abundant, hyaline, globose, ellipsoid or clavate cells 18.5 – 119 × 18.5 – 46 µm; clamps present. On stipe: not described. | ||||||||||||||||||||
| lamella edge tissue | No distinctive cells observed. | ||||||||||||||||||||
| basidiospores | From protolog (Ridley 1991): [53/5/-] 9 -12 × (6-) 6.5 - 8.5 µm, (Q = 1.20 - 1.61 (-1.69); Q' = 1.40), hyaline, amyloid, broadly ellipsoid to elongate; apiculus not described; contents not described; white in deposit. | ||||||||||||||||||||
| ecology | From protolog (Ridley 1991): Solitary. Under Nothofagus solandri var. cliffortioides, N. truncata and Leptospermum scoparium. Known from the North Island, New Zealand. | ||||||||||||||||||||
| material examined | From protolog (Ridley 1991): NEW ZEALAND: AUCKLAND—Cascade Pk., 9.vii.1967 R. F. R. & R. J. McNabb (paratype, PDD ‘GR15’). GISBORNE—Urewera Nat. Pk., 14.ii.1982 G. M. Taylor 1168 (paratype, K). WELLINGTON—Rimutaka For. Pk,. Orongorongo Valley, Paua Ridge, 29.iv.1987 G. S. Ridley 444 (holotype, PDD 56203); Tongariro Nat. Pk., Whakapapaiti Stream, 2.v.1967 R. F. R. McNabb (paratype, PDD 'GR16’); Whakapapanui Track, off Bruce Rd,. 1.ii.1988 G. M. Taylor [G. S. Ridley 584] (paratype, PDD 56204). | ||||||||||||||||||||
| discussion | From protolog (Ridley 1991): Amanita mumura belongs in subsection Solitariae of section and subgenus Lepidella. Its clamped basidia and irregularly disposed volva remnants, composed of inflated cells and abundant hyphae, suggest it best belongs in stirps Grossa. The yellow bruising pileus and the yellowing of the exposed context, combined with the rosy buff hue assumed by the dried basidiocarp, set it apart from the other members of the stirps. Older specimens are usually exannulate due to the friable nature of the annulus. One specimen (Taylor 1168) has a spurious ring set low on the stipe, whether or not this is a regular feature is unknown. | ||||||||||||||||||||
| citations | —R. E. Tulloss | ||||||||||||||||||||
| editors | RET | ||||||||||||||||||||
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