|
[ Section Validae page. ] [ Amanita Studies home. ] [ Keys & Checklist/Picturebooks ] Amanita campinaranae Bas"Campinarana Amanita"
Technical description (t.b.d.) BRIEF DESCRIPTION: The cap of A. campinaranae is about 60 mm wide, white to pallid grayish, thin, convex, later nearly plane with a depressed center, with no apparent innate fibrils, solid, viscid when moist, with a nonstriate and nonappendiculate margin. The volva is present as subfelted, crust-like remnants over the center and more isolated patches away from the center. The flesh is white and unbruising. The gills are free, between close and crowded, forked towards both the stem and margin, narrow, white, and turning cream to yellow when freshly dried, with a more or less concolorous edge. The short gills are attenuate. The stem is 77 × 9 mm, slightly tapering upward, pale gray, and glabrous. The bulb 20 mm wide, globose, subabrupt, dirty ochre or white. The volva is grayish, powdery to slightly warty and forms a ring in the zone where the bulb and stem meet. The ring is apical, membranous, skirt-like, quite thin, white and smooth above, very pale gray underneath. The flesh is white and unbruising. Odor none. The spores measure 5.6 - 6.7 × 5.5 - 6.5 µm and are strongly amyloid and globose to subglobose. Clamps are absent at bases of basidia. This species occurs in Campinarana type vegetation under leguminous trees and trees of the family Sapotaceae in the Brazilian state of Amazonas. It is believed to be symbiotic with at least some of the associated trees. Information about the Campinarana vegetation type can be found on the Smithsonian Institute Department of Botany website. Bas says (1978): "Within section Validae it is well characterized by its small, (sub)globose spores, it's thin white to greyish pallid cap with grey, crust- to patch-like volval remnants and it's globose bulb decorated with a greyish volval rim giving the bulb a submarginate appearance." In a recent discussion of small spore size in Amanitas of tropical forests, the present species was used as an example of this characteristic; and, of the small spored species in the Americas, it's spores are smallest (Tulloss 2005). -- R. E. Tulloss and L. Possiel [ Section Validae page. ] [ Amanita Studies home. ] [ Keys & Checklist/Picturebooks ] Last changed 30 September 2009. |