name | Amanita alboumbelliformis |
name status | nomen acceptum |
author | Yang-Yang Cui, Qing Cai & Zhu L. Yang. |
english name | "White Parasol Caesar" |
intro | This text is derived from the original description of Amanita alboumbelliformis. The fruiting bodies of Amanita alboumbelliformis are medium-sized to large. |
cap | The cap is 70 – 100 mm wide, plano-convex to planar, sometimes raised over the stem (umbonate, white, but cream at center. The cap’s margin is radially grooved (ca. 0.3 – 0.4 R), and there is not material hanging from the margin. The flesh is white. |
gills | The gills are free, crowded, and white. The short gills are truncate and plentiful. |
stem | The stem is 120 – 160 × 15 – 20 mm, nearly cylindric or narrowing upwards; its surface is white, covered with white to cream fibrils; the stem lacks a basal bulb. At the stem's base, there is a saccate volva with a white outer layer. The volva measures 50 – 80 × 40 – 50 mm, is membranous and has an inner surface is that is white to grayish. The ring is skirt-like, white when young, but becoming yellow when mature. |
odor/taste | The odor and taste of the present species were not recorded. |
spores | The spores measure 9.0 – 11.0 × 9.0 – 11.0 µm and are globose to subglobose and inamyloid. Clamps are common at bases of basidia. |
discussion |
Amanita alboumbelliformis corresponds
to A. cf. chepangiana in Yang
(2015).
This species occurs in mixed subtropical forests
in southwestern and southern China. The white fruiting body of A. alboumbelliformis calls mind to A. chepangiana Tulloss & Bhandary. However, A. chepangiana has relatively shorter grooves on the cap’s margin (about 20-30% of the cap's radius). The stem bears a fragile, white ring. The spores measure 9.5 – 12.5 × 8.5 – 11.5 µm and are subglobose to broadly ellipsoid.—Yang-Yang Cui and Rachel Warner |
brief editors | RET |
name | Amanita alboumbelliformis | ||||||||||||||||||||||||
author | Yang-Yang Cui, Qing Cai & Zhu L. Yang. 2018. Fungal Diversity 91(1): 47, figs. 3(f-g), 8. | ||||||||||||||||||||||||
name status | nomen acceptum | ||||||||||||||||||||||||
english name | "White Parasol Caesar" | ||||||||||||||||||||||||
etymology | albus, white + umbelliformis, having the form of a parasol or sunshade | ||||||||||||||||||||||||
MycoBank nos. | 826873 | ||||||||||||||||||||||||
GenBank nos. |
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holotypes | HKAS 83448 | ||||||||||||||||||||||||
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 material is derived directly from the protolog of the present taxon and associated documen- tation such as sequences deposited in GenBank. | ||||||||||||||||||||||||
editors | RET | ||||||||||||||||||||||||
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