Amanita altipes

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Amanita altipes
Scientific classification
Kingdom: Fungi
Division: Basidiomycota
Class: Agaricomycetes
Subclass: Hymenomycetes
Order: Agaricales
Family: Amanitaceae
Genus: Amanita
Species: A. altipes
Binomial name
Amanita altipes
Yang Weiß & Oberwinkler, 2004
Amanita altipes
View the Mycomorphbox template that generates the following list
Mycological characteristics
gills on hymenium
cap is umbonate
hymenium is free
stipe has a ring and volva
spore print is white
ecology is mycorrhizal
edibility: inedible

Amanita altipes, also called Yellow Long-Stem Amanita, is a species of agaric found on soil in coniferous (Abies, Picea) and broadleaved (Betula, Quercus, Salix) woodland in southwestern China up to an altitude of 4000 m.[1] The name 'altipes' means 'referring to the long stipe', and it suits the species as it has longer stems compared to its relatives.[2]

Physical description[edit]

This is a small to medium-sized agaric with a distinctively yellowish overall coloration. The other physical characteristics are as follows:

  • Cap : The cap has a diameter of up to 9 cm and is yellow, often brownish towards the centre. The appearance of the cap may be convex to plano-convex. The volva is present as felty, floccose patches, 2 – 5 mm wide and up to 1 mm thick. Unlike many of its relatives (for example, the Amanita pantherina), the remnants of the universal veil do not usually persist on the cap, being easily washed away by rain.[3]
  • Stem/Stipe : The stem is relatively long (up to 16 cm) and yellowish and usually tapers upwards. There is a large persistent ring.
  • Gills : The gills are free, crowded, and white to cream-colored to yellowish . The short gills are truncate, numerous, and are evenly distributed.
  • Spores and microscopic features : The spores measure 8.0 - 10.0 x 7.5 - 9.5 µm and are globose to subglobose and inamyloid. There are no clamps present at the bases of basidia.
  • Flesh : The flesh is white in color but inedible.

Habitat and distribution[edit]

This species is widespread in southwestern China mostly in Yunnan[4] as discussed before. It has also been reported that it is found in eastern Himalayas and adjacent regions.[2] It grows on soil in coniferous (Abies, Picea) and broadleaved (Betula, Quercus, Salix) woodland in southwestern China up to an altitude of 4000 m.

See also[edit]

References[edit]

  1. ^ OVGuide. "Amanita altipes video". All Media Guide (AMG). 
  2. ^ a b Yang Z. L.; Weib M.; Oberwinkler F. (2004). "New species of Amanita from the eastern Himalaya and adjacent regions" (PDF). Mycologia. 96 (Lawrence: The Mycological Society of America) (3): 636–646. 
  3. ^ Tulloss R. E. "Amanita altipes Zhu L. Yang, M. Weiss & Oberw. "Yellow Long-Stem Amanita"". 
  4. ^ Zhang L., Yang J.; Yang Z. "Molecular phylogeny of eastern Asian species of Amanita (Agaricales, Basidiomycota): taxonomic and biogeographic implications". Fungal Diversity (PDF). 17: 219–238.