Observation 93779: Helvella solitaria P. Karst.

Proposed Names

62% (2)
Recognized by sight: single fruit under conifers
40% (3)
Recognized by sight

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Eye3 = Observer’s choice
Eyes3 = Current consensus


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The source I used….
By: Britney Ramsey (Riverdweller)
2012-05-04 17:59:16 CEST (+0200)

From the Matchmaker Software for Helvella solitaria.

“…..the description below derived from Arora is for H. queletii (which he says has a longer stem than H. solitaria), included as a synonym by Abbott;…”

The entire entry as follows:
“…CAP 1.3-6.0cm across, 0.4-4.4cm high (up to 12.0 × 5.0cm fresh), cup-shaped, often laterally compressed at first, often becoming bilobate, shallowly cup-shaped, or somewhat reflexed when old, margin slightly inrolled at first; spore-bearing surface gray-brown to dark brown when fresh, when dry dark gray-brown to blackish brown, smooth to slightly undulate-rugose [wavy-wrinkled], (Abbott), 2-8(12)cm across, usually concave with opposite margins at first rolled up and in, becoming shallowly cup-shaped or saucer-shaped to flat or even with down-curved margin when old; upper surface blackish to grayish brown to brown or in one form pale brown to buffy-brown; smooth; margin often splitting when old, (Arora)
FLESH thin, rather brittle, (Arora)
UNDERSIDE medium to dark gray-brown at margin, base typically paler gray-brown to white; pubescent [downy] to densely pubescent, ribs absent or extending very slightly onto base of underside, (Abbott), same color as upper surface or more often paler or grayer; minutely roughened (granulose) to nearly smooth, without ribs, (Arora)
STEM 0.7-10.5cm x 0.2-5.0cm (up to 12.0cm x 5.0cm when fresh), equal or widened at base, top flaring slightly, sulcate and internally solid or with a few chambers; “white to pale or grey brown”, occasionally dark gray-brown at top; finely pubescent to pubescent, highly ribbed or rarely with sparse ribbing, ribs simple or branching and anastomosed, (Abbott), (1)2.5-7(12)cm x 0.5-2(5)cm, equal or wider in lower part, deeply longitudinally ribbed, the ribs extending only to the base of the cup; white or sometimes tinged buff, tan, or ocher, (Arora)
HABITAT single or often gregarious to numerous and scattered on ground in soil or litter in coniferous, mixed, or occasionally hardwood woods, April to October, (Abbott), single, scattered or in small groups in forest humus or occasionally on rotting wood, usually under hardwoods, late spring and summer, but in California may fruit in winter and early spring, (Arora)
MICROSCOPIC spores 17-21 × 11-13.5 microns, broadly elliptic, smooth, colorless, with one droplet; asci 240-300 × 14-18 microns, pleurorhynchous; paraphyses 7-8 microns wide at tip, end cell 89-144 microns long, “clavate, brown, contents finely granular”, (Abbott), spores (17)19-22 × 11-14 microns, elliptic to oblong, smooth, with large central oil droplet, (Arora)
NAME ORIGIN means ‘alone’
SIMILAR Helvella costifera is similar in color but has more prominent ribbing on stem and underside of cap and relatively broader stem, (Abbott); Helvella leucomelaena has aporhynchous asci and larger spores, (Abbott), H. leucomelaena has a less distinct stem that is often buried until maturity and the species differs microscopically, (Arora); Helvella cupuliformis never attains a large size, has an unpigmented stem, and lacks prominent ribbing on the stem with the ribs always absent from the base of the excipulum, (Abbott); Helvella chinensis never achieves large size, lacks prominent ribbing on stem and has slightly narrower spores, (Abbott)
SOURCES Abbott(1), Arora(1)* (as H. queletii), Larsen(1)
FAMILY Helvellaceae, Order Pezizales, Class Pezizomycetes, Phylum Ascomycota

For what it’s worth
By: Drew Parker (mycotrope)
2012-05-04 16:51:42 CEST (+0200)

Index Fungorum and Mycobank have not synonymized them.

According to Harmaja
By: Irene Andersson (irenea)
2012-05-04 08:50:25 CEST (+0200)

it’s solitaria, but I find it hard to beleive when I read Karsten’s description of solitaria. He describes a very tiny species (cup 1cm wide, stem 2mm high and 1mm broad..).

Which name is correct?
By: Britney Ramsey (Riverdweller)
2012-05-04 03:37:09 CEST (+0200)

Mushroom Expert’s notes indicate H. solitaria came before Helvella queletii.

Created: 2012-05-03 23:22:05 CEST (+0200)
Last modified: 2013-12-12 19:39:47 CET (+0100)
Viewed: 166 times, last viewed: 2017-11-26 15:03:02 CET (+0100)
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