Amanita cruzii - Amanitaceae.org - Taxonomy and Morphology of Amanita and Limacella
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name Amanita cruzii
name status nomen acceptum
author O. K. Mill. & Lodge
english name "José Cruz's Amanita"
images

  • 1. Amanita cruzii, Mpio. Floridablanca, Dpto. Santander, Colombia


  • 2. Amanita cruzii, mature fruiting body with veil resting on substrate, Mpio. Floridablanca, Dpto. Santander, Colombia



  • 3. Amanita cruzii, pulverlent cap with few remaining warts, Mpio. Floridablanca, Dpto. Santander, Colombia


  • 4. Amanita cruzii, partial veil still attached, Mpio. Floridablanca, Dpto. Santander, Colombia



  • 5. Amanita cruzii, partial veil, Mpio. Floridablanca, Dpto. Santander, Colombia


  • 6. Amanita cruzii, thick pulverulence on stipe, Mpio. Floridablanca, Dpto. Santander, Colombia


  • 7. Amanita cruzii, Mpio. Floridablanca, Dpto. Santander, Colombia



  • 8. Amanita cruzii, close-up of universal veil layers, Mpio. Floridablanca, Dpto. Santander, Colombia



  • 9. Amanita cruzii, intact partial veil, Mpio. Floridablanca, Dpto. Santander, Colombia


  • 10. Amanita cruzii, button without pyramidal warts, Mpio. Floridablanca, Dpto. Santander, Colombia


  • 11. Amanita cruzii, warts in depressions, Mpio. Floridablanca, Dpto. Santander, Colombia

    • intro The following is based on the authors' revision of the species.
    cap The 27-85 mm wide, convex to plane cap of Amanita cruzii has a distinctive, two-layered volva.  The underlying layer is rusty brown to bright orange, pulvurulent, and densely covers the cap.  This layer becomes sparse and fades to pale yellowish pink to orange-yellow towards the cap's short-striate margin during expansion.  The upper layer bears sordid white crumbly pyramidal warts.  These fall off with age or remain in small numbers around a slight umbo in the center of the cap.  Each of the warts rests on a shallow depression easily observed during the mushroom's "button" stage.
    gills The gills are free to moderately free, crowded, pale pinkish cream to pale light cream.  The short gills are plentiful, more or less truncate, and of diverse lengths.
    stem The stem is cylindric, 90 - 140 × 10 - 15 mm at apex; light orange-yellow to pinkish orange, densely covered in powdery patches that easily come off on contact. The stem has a pallid, buff to pinkish yellow, delicate skirt-like ring with rusty orange powdery material on the bottom. The ring sometimes falls to mid-stem or collapses on the bulb.
    odor/taste The odor of this species is faint or indistinct.
    spores Spore data based on collections from the Dominican Republic and Colombia are: (6.5-) 8.0 - 10.5 (-11.8) × (5.5-) 6.5 - 8.5 (-9.0) µm.  The spores are inamyloid and broadly ellipsoid or ellipsoid or (occasionally) subglobose.  Clamps are absent at bases of basidia.
    discussion So far as is known, Amanita cruzii is similar to only one other species with which it shares many otherwise unique morphological characters at both macro and micro levels.  Amanita cruzii and A. roseitincta both have a complexly layered volva—a brightly pigmented powdery layer set with pyramidal warts.  As a result, the editors of this site propose placing these two species and no others in stirps Roseitincta.

    Amanita cruzii has been found associated with native pine in the mountains of the Dominican Republic and with introduced Pinus patula in a cloud forest of the Cordillera Oriental of Colombia.—C. Rodríguez Caycedo & R. E. Tulloss
    brief editors RET

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