| name |
Amanita sp-Thai03 |
| author |
Tulloss & Sánchez-Ramírez & D. Arora |
| name status |
cryptonomen temporarium |
| MycoBank nos. |
double click in markup mode to edit. |
| GenBank nos. |
Due to delays in data processing at GenBank, some accession numbers may lead to unreleased (pending) pages.
These pages will eventually be made live, so try again later.
|
| lectotypes |
double click in markup mode to edit. |
| intro |
|
| pileus |
[white to reddish] brown when young, with age becoming white to whitish or pallid and browner or simply tan over disc, developing umbo with age; context ??; margin striate (0.15R-0.25R), ??; universal veil usually absent. |
| lamellae |
not described in annotations. |
| stipe |
white; context not described; partial veil subapical to superior, membranous, thin, persistent, skirt-like, white; universal veil saccate, apparently white on exterior, with exterior cracking in manner suggesting A. zambiana, at least in some specimens attached only to very base of stipe or becoming detached from stipe. |
| odor/taste |
not recorded. |
macrochemical
tests |
none recorded. |
| basidiospores |
[60/3/1] (8.2-) 9.2 - 11.0 (-13.0) × (7.8-) 8.2 - 9.8 (-11.0) µm, (L = 10.0 - 10.6 µm; L’ = 10.2 µm; W = 8.6 - 9.1 µm; W’ = 8.9 µm; Q = (1.05-) 1.08 - 1.24 (-1.25); Q = 1.11 - 1.17; Q’ = 1.15), hyaline, colorless, thin-walled, smooth, inamyloid, ??, subglobose to broadly ellipsoid; apiculus sublateral, ??; contents ??; white in deposit. |
| ecology |
Scattered. Cambodia: With dipterocarps. Thailand: In pure or mixed dipterocarp forests. |
| material examined |
CAMBODIA: Angkor Wat, vi.2000 D. Arora 00-10 (RET 350-7; SFSU).
LAOS: Luangprabang, 18.viii.1999 David Arora 99-332 (RET 350-1; SFSU).
THAILAND: CHIANG MAI PROV.—Om Koi Distr., 24.ix.1993 D. Arora C (RET 112-1); no locality, purchased in market, 19.viii.1995 local collector s.n. (RET 178-8; SFSU). ??—Sakon Nakhon, Poo Pan, viii.1998 D. Arora 98-35 (RET 351-7; SFSU). UNKN. PROV.—Amnat Charoen, 23.viii.2002 D. Arora 02-129 (RET 356-5). |
| discussion |
The collector's annotations of some collections conflict with the photograph (background image) in saying that the pileus of this species is "quite brown" to begin with. In fact, one "button" specimen in the picture appears to be very white.
The collector (Arora) has repeatedly mentioned to me the similarity between the present species and the central African A. zambiana.
The spores of the present species are more like those of the south Asian A. chepangiana than those of the African species; however, A. chepangiana is described as consistently milk-white at first, picking up faint tints (including tan) over the disc with age. The latter species is said to lack an umbo at all stages of development. Like the present species, A. chepangiana is known to be associated with dipterocarps.
The present species is like both of the above-named taxa in that it is considered a desirable edible in the area in which it naturally occurs and often appears in markets.
Sporograph comparisons of the above cited taxa with the present species are provided below.
The reader may also wish to compare this species with A. princeps and A. sp-Thai1. A sporograph comparison is provided here.
??more?? |
| citations |
—R. E. Tulloss |
| editors |
RET |
|
Spore data sets and their composite