Observation 66284: Amanita luteolovelata D.A. Reid

When: 2011-04-25

Collection location: Little Hartley, New South Wales, Australia [Click for map]

Who: Lucy (lucya)

Specimen available

near eucalyptus

Proposed Names

47% (2)
Recognized by sight
27% (1)
Recognized by sight: Assumption: that the cap edge was never appendiculate. Volva not membranous; stem with a ring.
Based on microscopic features: Amyloid spores; mature subhymenium composed of inflated cells.
76% (2)
Eye3 Eyes3
Used references: www.amanitaceae.org?Amanita+luteolovelata
Based on microscopic features: In addition to microscopic characters appropriate to Amanita sect. Validae, spore measurements were provided in a comment from May 2011.

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Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
Collection and its data are now added to WAO page
By: R. E. Tulloss (ret)
2011-10-15 01:19:04 CST (+0800)

for luteolovelata.

Thanks, Lucy.


By: R. E. Tulloss (ret)
2011-10-14 23:40:52 CST (+0800)

Lucy called my attention to the fact that after this observation was posted, several other collections made in the same immediate area were determined with some confidence to be A. luteolovelata. At her request, I have reviewed the data in my previous comments, which had focused on A. griselloides. The spore measurements provided for the present material are completely consistent with those from the above-mentioned collections of A. luteolovelata. Hence, it seems that we could propose the same name for this collection…at least provisionally. For a little more information, see:


Also, note the yellow volval material on the underside of the edge of the partial veil in the top photograph.

Very best,


Reid’s original description of A. griselloides
By: R. E. Tulloss (ret)
2011-05-31 22:07:43 CST (+0800)

I continued to compare the original description of Amanita griselloides with Wood’s description of material he placed under that name. I don’t think there is any question that there is more than one taxon involved. In fact, Reid emphasizes that his species has no skirt on the stem. Also it has much larger spores and, according to Reid, a very distinctive universal veil with an upper layer suggesting a white spider’s web. Reid’s species was originally described from the far south of Western Australia.

I’ve posted Reid’s original data on his type and on other material he collected and attributed to griselloides on the technical tab here:


Very best,


assignable to sect. Validae
By: R. E. Tulloss (ret)
2011-05-31 09:40:48 CST (+0800)

Lucy kindly sent me the dried specimen corresponding to these images.

A through evaluation of the matierial has not yet been made. One characteristic of the dried specimen is that the cap surface has become very dark brown after drying.

The spores are amyloid, ellipsoid, and rather small — like those of many species of Amanita sect. Validae. Likewise, the mature subhymenium is composed of inflated cells; this is generally true throughout sect. Validae.

Although the match is far from perfect, the closest description that I could find in the literature is A. griselloides as it was described by A. E. Wood in 1997. Unfortunately, Wood’s description is a poor match to the original description of A. griselloides. Also, the “Q” given by Wood is not the Q of most other authors (i.e., the range of the ratio of spore length to spore width for all spores measured). For Wood, “Q” means the range of average Q, where the average is computed for each collection (note: a collection could include multiple specimens) from which spores were measured. I do not know anyone else who has described amanitas who uses Q in this way. Unfortunately, this means that one cannot directly and simply compare Wood’s data with anyone else’s data.

Spore measurements obtained do not match those provided in the original description of A. griselloides by D. A. Reid — those spores are considerably bigger.

Spore data for the present taxon: [20/1/1] (7.2-) 8.1 – 9.3 (-10.5) x (5.3-) 5.9 – 6.9 (-7.2) microns, (avg. length = 8.7 microns; avg. width = 6.3 microns; Q = (1.20-) 1.24 – 1.46 (-1.70); avg. Q = 1.37), smooth, amyloid, broadly ellipsoid to ellipsoid, rarely elongate, often adaxially flattened; apiculus sublateral, cylindric, rather small; contents not observed (can’t be seen in Melzer’s Reagent because of amyloid reaction); color of spores in deposit not recorded.


Created: 2011-04-26 07:03:41 CST (+0800)
Last modified: 2011-10-15 19:46:06 CST (+0800)
Viewed: 148 times, last viewed: 2018-01-01 12:08:17 CST (+0800)
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