Technical description (t.b.d.)

BRIEF DESCRIPTION: The following is based on the description by Boedijn (1951) and the original description by von Höhnel (1914. Sitzungsber. Kaiserl. Akad. Wiss. Wien, Math.-Naturwiss. Kl., Abt. I 123: 74).

The cap of A. angustilamellata is 40 - 90  mm wide, smoke brown, darkest in the center (original description) or gray, darkest in the center about "drab", gradually fading to light drab to smoky-gray towards the margin (Boedijn), convex to plano-convex, sometimes with a slightly subumbonate, matte, with a sulcate-striate margin (about 50% of the radius). The volva is either absent or present as a few large, white patches. The flesh is thin, white, 2 - 3 mm thick over the stem, and rapidly thinning toward the margin.

The gills are free, white or about pale pinkish buff, 3 - 7 mm broad in the middle.

The stem is 90 - 125 × 7 - 15 mm, narrowing upward, dirty white to whitish, hollow, nearly smooth, with some indistinct dark fibrils near the base. The diameter of the stuffed part of the stem is up to 11 mm wide. The saccate volva is attached to the stem only at the base and 45 -51 × 12- 14 mm.

The spores measure 9 - 12 µm in length and are globose according to Boedijn. According to Corner and Bas (1962) the spores from Singapore material measured 11 - 13 (-15) µm and are "globulose" and inamyloid. Z. L. Yang's unpublished study of the type (Farlow Herbarium) yielded these measurements: 11.0 - 14.0 (-15.0) × (10.0-) 10.5 - 13.0 (-14.5) µm, globose to subglobose.  Yang (1997) reported the following spore data from southwestern Chinese material: (9.0-) 9.5 - 11.0 (-12.0) × (8.0-) 9.5 - 10.5 (-11.5) µm, globose or (infrequently) subglobose and inamyloid. Yang reports that clamps are absent at bases of basidia. Yang (unpub. data) has measured the spores of the type. [report coming]

This species was originally described from Java (Indonesia) and has since then been reported from Singapore, Sri Lanka, Thailand, and southwestern China (Yang).

The first drawing (top) is the illustration from von Höhnel's annotations found with the specimen in the Farlow Herbarium.  The E. J. H. Corner watercolor and the collection on which the watercolor was based are the basis of the interpretation of Corner and Bas. 

Variations in spore measurements suggests not all the material studied were the same species. However, sample sizes are so small that no conclusion can be drawn. 
-- R. E. Tulloss

Pencil sketch: F. von Höhnel (Tijbodas, Indonesia), courtesy of the Farlow Library and Herbarium, Harvard Univ., Cambridge, Mass.

Watercolor: courtesy of Persoonia (Singapore).

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Last change 12 February 2007
This page is maintained by R. E. Tulloss.
Copyright 2006, 2007 by Rodham E. Tulloss.
Watercolor copyright 1962 by PersoonIa.