| name |
Amanita colombiana |
| author |
Tulloss, Ovrebo & Halling. 1992. Mem. New York Bot. Gard. 66: 8, figs. 4-5, 31. |
| name status |
nomen acceptum |
| english name |
"Colombian Red-Warted Ringless Amanita" |
| etymology |
Colombia + -ana, suffix indicating possession; hence, "of Colombia" |
| MycoBank nos. |
359388 |
| GenBank nos. |
Due to delays in data processing at GenBank, some accession numbers may lead to unreleased (pending) pages.
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|
| holotypes |
HUA |
| intro |
The following text may make multiple use of each data field.
The field may contain magenta text presenting data from a type study
and/or revision of other original material cited in the protolog of the present taxon.
Macroscopic descriptions in magenta are a combination of data from the protolog and
additional observations made on the exiccata during revision of the cited original
material.
The same field may also contain black text, which is data from a revision of the present
taxon (including non-type material and/or material not cited in the protolog).
Paragraphs of black text will be labeled if further subdivision of
this text is appropriate.
Olive text indicates a specimen that has not been
thoroughly examined (for example, for microscopic details) and marks other places in the text
where data is missing or uncertain.
The following material not directly from the protolog of the present taxon and not cited as the work of another researcher is based on original research by R. E. Tulloss. |
| pileus |
22 - 55 mm wide, dull olive brownish gray (near 81 d. gy. y. Br.) to grayish (6E4 with 6F5 over disc), not discoloring, subpolished, smooth, tacky; context 3 - 4 mm thick, white to grayish, unchanging; margin nonappendiculate, plicate-sulcate (striations 0.4R - 0.75R); universal veil as flat patches or as pyramidal to conical warts (occasionally flattened on top), scattered or often clustered near center, fulvous at first (between 51 deep O and 55 s Br), darkening in age to dark reddish brown or red-brown or fuscous brown. |
| lamellae |
free, close to subdistant at maturity, white, not discoloring, drying close to 4A4 to a little more cream than 4A4 to 5B4, 4 - 6 mm broad, rarely forking near pileus margin; edge grayish marginate when mature, very finely fimbriate (with 10× lens); lamellulae numerous, not in regular tiers, truncate. |
| stipe |
60 - 80 × 4 - 6 mm, dingy white to grayish overall, not discoloring, tapering slightly to apex, very finely and sparsely appressed fibrillose with fibrils largest and coarsest near base; context white, hollow; exannulate; universal veil in patches of fulvous, cottony tissue, forming incomplete to complete ring above a similar portion appressed to very base of stipe, woolly, and fulvous (7-8D8) at first, eventually dark gray (sometimes with reddish tints). |
| odor/taste |
Odor and taste absent. |
macrochemical
tests |
2.5% KOH - negative on pileus and lamellae. Test voucher: holotype. |
| pileipellis |
40 - 100 µm thick, gelatinizing at the surface, hyaline in at least the upper half, palely tinted with pigmentation of context below; interwoven infrequently branching filamentous undifferentiated hyphae 2.0 - 10.2 µm wide, subradially arranged; vascular hyphae present, rarely branching, locally common, 2.8 - 10.0 µm wide. |
| pileus context |
wcs = 65 - 75 µm; interwoven branching filamentous undifferentiated hyphae 2.8 - 14.5 µm wide, hyaline or with orange-brown to brownish intracellular pigment which sometimes forms reddish brown particles or guttules; inflated cells ellipsoid to elongate to subclavate, to 123 × 52 µm; branching vascular hyphae plentiful, locally in tangles, 2.0 - 10.5 µm wide. |
| lamella trama |
wcs = 65 - 75 µm; interwoven branching filamentous undifferentiated hyphae 2.8 - 14.5 µm wide, hyaline or with orange-brown to brownish intracellular pigment which sometimes forms reddish brown particles or guttules; inflated cells ellipsoid to elongate to subclavate, to 123 × 52 µm; branching vascular hyphae plentiful, locally in tangles, 2.0 - 10.5 µm wide. |
| subhymenium |
wst-near = 50 - 65 µm; wst-far = 60 - 80 µm; ramifying subcellular (in some regions, may give impression of pseudoparenchymatous tissue until small hyphal segments immediately below many basidia are noted); basidia arising from short uninflated to slightly inflated branching hyphal segments, also occasionally from inflated cells 8.0 - 11.5 µm wide. |
| basidia |
43 - 81 × 13.2 - 19.8 µm, 4-, or occasionally 2-sterigmate, thin-walled; sterigmata often rather broad at the base, up to 7.5 × 2.2 µm; clamps not observed. |
| universal veil |
On pileus: all elements somewhat gelatinizing, dissociated; branching filamentous undifferentiated hyphae 2.3 - 6.4 µm wide, not plentiful, fragmented; inflated cells numerous, subglobose to ellipsoid to ovoid to clavate, dominant, to 57 × 34 µm, thin- to slightly thick-walled, collapsing, dull brownish when inflated, but losing pigment upon collapsing, orange-brown in mass in exsiccatae; vascular hyphae uncommon, fragmented, 2.0 - 2.5 µm wide. On stipe base: branching filamentous undifferentiated hyphae much more plentiful, 3.0 - 9.5 µm wide; inflated cells with brown intracellular pigment, dominant, globose to subglobose to ellipsoid to ovoid to clavate as on pileus, to 67 × 49 µm, terminal or occasionally in short chains, having walls 0.5 - 1.5 µm thick, orange-brown in mass in exsiccatae; vascular hyphae scarce or absent. |
| stipe context |
acrophysalidic; branching filamentous undifferentiated hyphae, having ochraceous tint near surface; 1.2 - 13.2 (-21) µm wide, dominant; acrophysalides to 278 × 70 µm, mostly less than half that size, with thin walls or walls to 0.8 µm thick; branching vascular hyphae common to plentiful, locally in knots, 1.5 - 12.5 µm wide. |
| basidiospores |
[126/5/4] (9.0-) 10.0 - 12.8 (-14.5) × (8.5-) 9.5 - 12.2 (-14.0) µm, (L = 10.8 - 11.9 µm; L’ = 11.4 µm; W = 10.5 - 11.3 µm; W’ = 11.0 µm; Q = 1.0 - 1.08 (-1.17); Q = 1.03 - 1.05; Q’ = 1.04; inamyloid, hyaline, thin-walled, smooth, globose to subglobose; apiculus sublateral, cylindric; contents granular to monoguttulate; probably white in deposit. |
| ecology |
Solitary or in pairs. Colombia: At 2500± m elev. Under Quercus humboldtii. Costa Rica: At 2500 m elev. Under Q. seemannii (Franco-M. 1094). |
| material examined |
COLOMBIA: ANTIOQUIA—Mpio. San José de la Montaña - Estacion La Oculta, along rd. from San José de la Montaña to Labores, 25.xi.1986, Ovrebo 2541 (paratype, HUA), 26.xi.1986, Ovrebo 2560 (paratype, HUA). Mpio. Santa Rosa de Osos - vereda “El Chaquiro,” rd. from Santa Rosa de Osos to Aragon, ca. Llanos de Cuivá, 5.xi.1986 C. L. Ovrebo 2425 (holotype, HUA).
COSTA RICA:
SAN JOSÉ—Ctn. Dota - San Gerardo de Dota no. 1, 5± km SW of Cerro de la Muerte, Albergue de Montaña Savegre (Cabinas Chacón) [9°33’2” N/ 83°48’27” W, 2200-2350 m], 6.xi.1993 R. E. Halling, G. M. Mueller, B. A. Strack, M. Mata & A. E. Franco-M. [Franco-M. 1094] (NY). |
| discussion |
The coloring of the universal veil in A. colombiana is unique among the species described in section Vaginatae. Red spots are said to appear on the universal veil of A. constricta Thiers & Ammirati (1982) in moist conditions; and that species (described from northern California) does have plentiful vascular hyphae in the pileus context; but A. constricta has a more nearly submembranous universal veil that is mostly grayish and spores with Q = (1.06 ) 1.07 - 1.17 ( 1.18) according to type studies of Tulloss (1994). |
| citations |
—R. E. Tulloss |
| editors |
RET |
|
Spore data sets and their composite