Amanita fritillaria f. malayensis Corner & Bas differs in three characters as follows.
The volva remnants on the cap are larger than those on the type form. The cap color is darker than in the type form—dark umber to pale greyish umber-fuscous over the cap's center. In both forms the caps appear virgate—with comparably darker innate radial lines.
The gills are not said to differ from those of the type variety.
The stipe is not said to differ from that of the type variety.
The spores are globose to broadly ellipsoid and 6.0 - 7.6 × 5.4 - 6.6 (-7.6) µm [measured in the fresh state by Corner, 7 - 8 × 6.5 - 7.5 µm].
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Z. L. Yang. 1997. Biblioth. Mycol. 170: 202, fig. 165. [brief]
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The following material is derived entirely from the protolog of the present taxon.
from protolog: 50 - 100 mm wide, dark umber to rather pale graying umber, fuscous over disc, innately darker fibrillose, becoming plane or concave, with or without umbo, slightly viscid; context white, becoming slightly ochraceous on cutting or bruising, 5 - 10 mm thick over stipe; margin nonstriate; universal veil as densely distributed conical warts, umber-fuscous, darker than pileipellis, small, soft, 1.5 - 2.4 mm wide and 1.5 - 2 mm high over disc and diminishing to flocculent squamules near margin.
from protolog: free, crowded, white, 6 - 9 mm wide, ca. 100 "primaries"; lamellulae attenuate, plentiful, unevenly distributed ("0 - 1 - 3 between each pair" of otherwise adjacent lamellae).
from protolog: 90 - 110 × 90 - 12 mm (width measured at apex), pale brownish or grayish-brownish, whitish at apex, entirely finely and appressedly fuscous-fibrillose in vague peronate zones, somewhat attenuate upward; bulb subglobose to slightly turbinate, 15 - 20 mm wide; context solid, becoming more or less hollow, white, becoming slightly ochraceous on cutting or bruising; partial veil submedian to median, brownish gray, floccose-membranous, 8 - 10 mm wide, with very small umber-fuscous warts on edge, often pendent at first, then often fragmented or deciduous, sometimes only present as greyish brown patches distributed from upper portion of stipe to near base; universal veil as 2 - 4 rows of small warts, fuscous-umber, scurfy, 0.5 - 1 mm wide.
from protolog: ca. 80 μm thick, two-layered; suprapellis 10 - 20 μm thick, gelatinized, including distant and fading brown hyphae; subpellis ungelatinized; filamentous hyphae subradially arranged, densely interwoven, brown, farthest from stipe context 2.5 - 4.5 μm wide with scattered darker brown slightly clavate tip cells, nearest to stipe context up to 8 μm wide; clamps not observed.
from protolog: distinctly bilateral; with all inflated elements in central stratum curving into subhymenial base; filamentous hyphae narrow; inflated cells up to 200 × 30 μm in or near central stratum, shorter and broader near subhymenium; clamps not observed.
from protolog: pseudoparenchymatous (cellular); about 40 μm wide, not distinctly separated from subhymenial base; inflated cells ca. 25 μm wide nearest to subhymenial base and ca. 7 μm wide at bases of basidia; clamps not observed.
from protolog: 25- 35 × 7 - 11 μm, 4-sterigmate, sterigmata ca. 5 μm long; clamps not observed.
from protolog: On pileus: filamentous hyphae scarce, with anticlinal orientation; inflated cells brown, globose to ellipsoid (up to 100 μm wide), more rarely clavate to elongate (up to 180 × 45 μm), predominantly in anticlinally oriented terminal chains; clamps not observed. On stipe base: filamentous hyphae 1.5 - 7 μm wide, rather numerous; inflated cells dominant, brown, polymorphous, up to 40 μm wide; clamps not observed.
from protolog: longitudinally acrophysalidic; filamentous hyphae brown near external surface; acrophysalides up to 350 × 60 μm, sometimes with similarly shaped subtending cells, near surface smaller and brown and scattered; clamps not observed.
lamella edge tissue
from protolog: inflated cells numerous, globose to ellipsoid to clavate, up to 45 μm long; clamps not observed.
from protolog: [-/-/-] 6.0 - 7.6 × 5.4 - 6.6 (-7.6) μm, (Q = 1.0 - 1.25; Q = 1.10 - 1.15), colorless, hyaline, smooth, thin-walled, amyloid, globose to subglobose to broadly ellipsoid; apiculus proportionately small; contents cloudy granular; color in deposit not recorded. [Spores reported as measuring 7.0 - 8.0 × 6.5 - 7.5 μm in fresh material.]
from Yang (1997): [50/1/1] 6.5 - 8.0 × (5.5-) 6.0 - 7.0 (-7.5) μm, (Q = (1.03-) 1.08 - 1.20 (-1.23); Q = 1.13 ± 0.05), hyaline, colorless, smooth, thin-walled, amyloid, subglobose to broadly ellipsoid, infrequently globose; apiculus not recorded; contents not reported; color in deposit not reported.
from protolog: Singapore: In small troops or sollitary, frequent. Terrestrial in forest.
Solitary. China: In subtropical, evergreen, broad-leaved forest with Castanopsis and Lithocarpus.
from protolog: SINGAPORE: Botanic Gardens, Gardens' Jungle, 25.xi.1940 E. J. H. Corner s.n. (holotype, L, in liquid and with watercolor drawing); Bukit Timah, 13.xii.1940 E. J. H. Corner S.d. (paratype, L, watercolor drawing only).
from Yang (1997): CHINA: YUNNAN—Pu'er Prefecture - Jiangcheng Hani and Yi Autonomous County, unkn. loc., 1050 m, 7.viii.1991 Z. L. Yang 1438 (HKAS 24177).
from protolog: "Eaten with relish and immediately on sight by monkeys. The director of the Kew Herbarium kindly enabled us to study the type specimen of A. fritillaria.... It is a dried, half specimen with many, small blackish remnants of the volva on the brown pileus. These remnants are more or less conical over the center of the pileus and pass via flattened conical warts into smaller patches near the margin. Warts and patches appear to consist of erect chains of mainly ellipsoid, dark brown cells, similar to those in the Malayan material described above, but somewhat smaller. There is no striking difference in structure of the volva between the Malayan and the Indian material.
"The base of the stipe of the type is incomplete, and neither Berkeley’s description nor J. D. Hooker’s watercolor drawing (of which recently a copy was presented to the Rijksherbarium, Leiden) provide any information about the remnants of the volva at the base of the stipe.
".... However, the Malayan material is here described as a new form of that species to stress the points of difference, viz. the more ellipsoid spores, the smaller cells in the remnants of the volva on the pileus, and the paler grey color of the pileus of the type of A. fritillaria. ....
"From A. pilosella Corner & Bas, the present species differs by the viscid cuticle without hair-like elements and the larger size.
"Amanita spissacea Imai from Japan is very similar, but seems to have a more floccose stipe and flat and larger patches on the pileus. Moreover, the remnants of the volva on the base of the stipe are powdery.
"Compare also the species, Amanita species 1 [on this site Amanita sp-Corner-&-Bas-1], which may be another form or variety of A. fritillaria."
This form differs from A. fritillaria f. fritillaria by the shape of the spores (globose to broadly ellipsoid), the darker color of the pileus (it is paler in and grayer in the type form), and the larger inflated cells of the universal veil remnants on the pileus. With three purported differences, it would appear that the present taxon may deserve species rank.
—R. E. Tulloss
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