Amanita sp-CR14

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name	Amanita sp-CR14
name status	cryptonomen temporarium
author	Tulloss and Halling
images	1. Amanita sp-CR14, La Chonta, Ctn. Dota, Prov. San José, Costra Rica (RET 331-8).
intro	The following is based on original research of R.E. Tulloss.
cap	The pale gray to pale brown cap has a darker rounded knob in the center and is 30-76 mm wide. The colors are darker in older specimens, and there is no staining or bruising reaction. The cap is planar to planoconvex. The cap's flesh is white, 1.5 - 4.5 mm thick, and thins evenly to the cap's edge. The edge is not grooved except in aged specimens and no volval remnants remain attached to the cap.
gills	The crowded gills are free from the stem, and no downward line descends onto the upper stem; they are 2.5 - 4.5 mm broad. The short gills are plentiful and of diverse lengths.
stem	The white, slightly longitudinally grooved stem is 76 - 119 × 3.5 - 8 mm, narrows upward, and flares at the top. The stem has no staining or bruising reaction. The bulb at the stem's base is 7 -19 x 10.5 - 19.5 mm and is flattened horizontally. The stem's white flesh is solid with a partially watersoaked central cylinder that is 1-2.5 mm wide. The white skirt-like ring is placed toward the top of the stem and is membranous; it collapses on the stem. Volval remnants are limbate as in Amanita bisporigera.
odor/taste	A slight odor of decay is present in younger specimens. Taste was not recorded.
discussion	This little known entity has been collected at least twice in Costa Rica. The collections were found growing by themselves or paired at 1900 - 2400 m elevation in dark wet loam of a forest with species of oak (Quercus copeyensis, Q. seemannii and Q. rapurahuensis) or in a mixed broad-leafed forest with oak (Quercus seemannii dominant). This species has a very slender stem with a ring toward the top. Field notes distinguish this species from Amanita solaniolens (assignable to sect. Validae), which was collected on the same expedition to Costa Rica. Other field notes suggest comparisons with A. arocheae and A. eburnea. It appears to be a species of sect. Phalloideae.—R. E. Tulloss and N. Goldman
brief editors	RET

name

Amanita sp-CR14

author

Tulloss and Halling

name status

cryptonomen temporarium

GenBank nos.

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accession	locus	voucher	source



No data available in table

intro

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 is based on original research of R. E. Tulloss.

pileus

30 - 76 mm wide, very pale brownish gray, with umbo darker (although still pallid) gray to brownish gray, with all colors darker in oldest specimen, without staining or bruising reaction, planoconvex to planar, umbonate, with umbo more pronounced in age, viscid; context white, with watersoaked line at join with stipe context and over lamellae, entirely watersoaked in oldest specimen, 1.5 - 4.5 mm thick, thinning evenly to margin; margin nonstriate, except in age, nonappendiculate; universal veil absent from pileus.

lamellae

free. without decurrent line on stipe apex, crowded, off-white in mass, water-soaked white in side view, 2.5 - 4.5 mm broad, broadest somewhat toward the margin from midlength, rounded at margin; lamellulae subtruncate to subattenuate, unevenly distributed, of diverse lengths, plentiful.

stipe

76 - 119 × 3.5 - 8 mm, white, without staining or bruising reaction, narrowing upward, flaring at apex, finely longitudinally striatulate; bulb 7 - 19 × 10.5 - 19.5 mm, subglobose, more or less longitudinally flattened; context white, neither staining nor bruising, solid, with partially watersoaked central cylinder 1 - 2.5 mm wide, with no larval tunnels observed; partial veil apical, white, thin, membranous, persistent, skirt-like, collapsing on stipe, not discoloring, without colored edge; universal veil limbate as in A. bisporigera.

odor/taste

Odor faintly of decay in youngest specimen. Taste not recorded.

macrochemical
tests

spot test for tyrosinase (paracresol) - after 5 min strong positive in upper part of bulb, positive in in spots on pileus context, stipe context and in limb on bulb; after 26 min. positive throughout bulb and attached limb, in irregular area below pileipellis in pileus context, and in irregular patch extending length of stipe mostly concentrated near stipe surface. spot test for laccase (syringaldazine) - negative throughout fruiting body. Test voucher: Tulloss 6-29-95-G.

lamella edge tissue

sterile; ??.

ecology

Solitary or paired. At 1900 - 2400 m elev. In dark wet loam of old open remnant forest occasionally used as pasture with Quercus copeyensis, Q. seemannii and Q. rapurahuensis or in mixed broadleafed forest with Q. seemannii dominant.

material examined

COSTA RICA: PROV. ALAJUELA—Ctn. Grecia - Grecia, Bosque del Niño [10°9’4” N/ 84°14’42” W, 1900 m], 29.vi.1995 Juber Torres & Juan Luis Mata s.n. [Tulloss 6-29-95-G] (RET 338-4). PROV. SAN JOSÉ—Ctn. Dota - La Chonta [9°41’58” N/ 83°56’31” W, 2400 m], 16.vi.1995 R. E. Tulloss 6-16-95-G (RET 331-8, nrITS seq'd.).

discussion

This species has a very slender stipe and an apical partial veil; it was not observed to have any yellow or olive tones on the basidiome. The field notes distinguish it from Amanita sp-CR18, which was collected on the same expedition. Other field notes suggest comparison with A. arocheae and A. eburnea. It seems to have suggested a species of sect. Phalloideae in the field. Nevertheless, perhaps because of the relative small size of the basidiomes of the two possible taxa, field notes take great pains to distinguish the present entity from A. sp-CR18.

citations

—R. E. Tulloss

editors

RET

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name	Amanita sp-CR14
name status	cryptonomen temporarium
author	Tulloss and Halling
images	1. Amanita sp-CR14, La Chonta, Ctn. Dota, Prov. San José, Costra Rica (RET 331-8).
photo	RET - (1) La Chonta, Canton de Dota, Provincia de San José, Costra Rica (RET 331-8).

name	Amanita sp-CR14

name	Amanita sp-CR14

no collection records available. Please create a collection record in order to enter spore measurements and derive sporograph from them. The form below will draw a sporograph based on data entered:

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infrasp. taxa, subjunquillea
2

stirps Hesleri
3

stirps Levistriata
4

Sporograph Form T.B.D.

infrasp. taxa, subjunquillea2

stirps Hesleri3

stirps Levistriata4

Amanita sp-CR14

Sporograph Form T.B.D.

infrasp. taxa, subjunquillea
2

stirps Hesleri
3

stirps Levistriata
4