Amanita ochroterrea - Amanitaceae.org - Taxonomy and Morphology of Amanita and Limacella
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name Amanita ochroterrea
name status nomen acceptum
author Gentilli ex Bas
english name "Ocher Earth Lepidella"
synonyms
=Amanita brunneiphylla O. K. Mill.
images

  • 1. Amanita ochroterrea, King's Park, Perth, Western Australia, Australia.


  • 2. Amanita ochroterrea, Western Australia, Australia.


  • 3. Amanita ochroterrea, Western Australia, Australia.



  • 4. Amanita ochroterrea, Western Australia, Australia.


  • 5. Amanita ochroterrea, Western Australia, Australia.



  • 6. Amanita ochroterrea, Western Australia, Australia.

  • intro This description is based on Bas' (1969) original description and the original description of A. brunneiphylla (Miller 1992).
    cap The cap of Amanita ochroterrea is 100 - 110 mm wide, convex to plane or plano-concave with age, dingy buff, darker with age, with a nonsulcate, appendiculate margin.  The cap is covered with more or less felted-subfloccose, indistinctly delimited, patch- or crust-like remnants of volva especially at the center.

    From our former brief tab for A. brunneiphylla based on (Miller 1992): The fruiting bodies of this species grows deeply inserted in sandy soils--with only the cap showing above the surface.  The cap of Amanita brunneiphylla is 45 - 85 mm wide, broadly convex to nearly plane in age, dry, dull white, with a nonstriate and appendiculate margin.  The cap is covered with numerous soft, low, white, cottony volval warts over the center, diminishing toward the cap margin.  The volva also comes off easily on the fingers.  The flesh is white.
    gills The gills are crowded, free or just reaching the top of the stem, moderately broad, and dingy buff to dark buff.  The short gills are truncate.

    From our former brief tab for A. brunneiphylla based on (Miller 1992): The gills are subdistant, broad in the center, nearly free, light brown, and darker brown with age.  The short gills are of diverse lengths and common.
    stem The stem is 160 - 190 × 20 - 30 mm, dingy buff, with a few more or less concentric rows of recurving, small scales.

    From our former brief tab for A. brunneiphylla based on (Miller 1992): The stem is 105 - 140 × 13 - 21 mm, dull white, with mealy patches of volva at the base.  The bulb is a tapering fusiform bulb, 40 - 60 × 25 - 36 mm.  The flesh is white, tinted gray in the base.
    odor/taste From our former brief tab for A. brunneiphylla based on (Miller 1992): The odor of this species is offensive, "stale," or chlorine-like.
    spores The spores measure (10-) 11 - 13 (-13.5) × 5 - 6.5 µm and are amyloid and cylindrical to elongate.  Clamps are present at bases of basidia.

    From our former brief tab for A. brunneiphylla based on (Miller 1992): The spores measure (8.0-) 9.0 - 10.8 × 4.1 - 5.0 µm and are elongate to cylindric and strongly amyloid.  In deposit, the spores are said to have an unusual pale yellow color.
    discussion Amanita ochroterrea is known only from the state of Western Australia, Australia.

    Bas placed this species in his stirps Grossa.  It was originally interpreted by Gentilli as a form of A. preissii (Fr.) Sacc.; however, because of the difference in volval structure, the presence of clamps, and a less gelatinized structure of the cap's skin, Bas argued instead that A. ochroterrea be placed in his stirps Grossa (see the discusssion of A. grossa (Berk.) Sacc.).

    See also, an extended discussion under Amanita austroviridis O. K . Mill.—R. E. Tulloss

    From our former brief tab for A. brunneiphylla based on (Miller 1992): Originally described from the state of Western Australia in association with open stands of Eucalyptus and Allocasuarina growing in deep sandy soil.

    In Amanita, elongate bulbs, narrow spores, and fruiting bodies deeply inserted in the soil are often associated with "leaky" ecosystems (Tulloss 2005).

    Café au lait lamellae are known from North American taxa such as A. microlepis Bas and A. pelioma Bas.  However, the American species have little else in common with A. brunneiphylla.

    Miller reports one of the paratype specimens to have had a yellow tint which suggests that this species may be subject to the yellowing syndrome that has been noticed in species of section Lepidella from all over the world.  (See Amanita subsolitaria (Murrill) Murrill.)—R. E. Tulloss
    brief editors RET

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