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Agrocybe pediades (Fr.) Fayod 1889

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Agrocybe pediades (Fr.) Fayod, Ann. Sci. Nat., Bot., 7e Sér. 9 358 (1889)
Agrocybe pediades (Fr.) Fayod 1889

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Exotic
Present
New Zealand
Political Region

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Fayod
Fr.
(Fr.) Fayod
1889
358
as 'pædiades'
Fr.
ICN
species
Agrocybe pediades

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pediades

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Naucoria pediades (Fries) (6,16) Fig. 20 = Agrocybe pediades (Fries) Fayod

All characters of the N.Z. collection (COLENSO 269) are similar to those of this fungus in Europe. Probably another introduced fungus growing by preference in paddocks and lawns.

Pileus thin, convex, then becoming plane, obtuse, often more or less depressed, never umbonate, dry, at length minutely rivulose or radially wrinkled, but never striate, yellowish-ochre, then pale tan-colour, 2.5-5 cm. across; gills adnexed, crowded at first, becoming rather distant as the pileus expands, about 4 mm. broad, at first brownish, then dingy-cinnamon; spores dingy-ferruginous, elliptical, 10-12 x 4 - 5 µ; cystidia fairly numerous, 30-50 x 8 -10 µ; stem 5-8 cm long, 2-4 mm thick, somewhat flexuous, silky, yellowish, base slightly bulbous, stuffed with a distinct pith.
New Zealand. Australia, Ceylon, South Africa, Europe, Siberia, United States.
Among grass.
Allied to Naucoria sideroides. For distinctive features, see note under last-named species.

Agrocybe pediades (Fr.) Fayod 1889

Material examined; on sandy roadside, disturbed by road-grader, Skipper's Canyon, 28 xi 1982, Taylor 1263; on soil, Brian Duder's farm paddocks, Clevedon, 16 iv 1983. Taylor 1325. Also a poor collection from Piha; Segedin 1220.
The New Zealand material possessed the following characters: Pileus hemispherical convex or plano-convex, pale tan or golden tan, smooth. Stipe equal, neither ring nor velar fragments present. Gills adnate-sinuate, blackish brown. Basidiospores 12-14 x 7.5-8.5 µm, elliptic in face-view, slightly flattened in side-view, thick-walled; germ-pore broad, central. Basidia 4-spored, 33-34 x 9-11 µm, cylindrico-clavate with basal clamp-connections, hyaline, some pale yellowish. Cheilocystidia 19-35(-40) x 5-12 µm tibiiform with subcapitate to capitate head 2-5 µm broad, some with tapered neck, non-capitate 35-48 x 5-10 µm with apex 2-3 µm broad; pleurocystidia absent. Caulocystidia supported by cylindric hyphae with clamp-connections, in shape similar to those on gill-edge, varying from cells with tapered neck to cells with or without capitate head, some with pale yellow incrustations in alkali solutions. Clamp-connections present.

In Taylor 1263 the basidiospores were slightly larger especially in breadth, 12.5-15(-16) x 8-10(-11) µm, and may represent an independent but closely related taxon but without field data it is impossible to decide, especially as only two collections are available and each may represent the two extremes of a range of variation. In Segedin 1220 the basidiospores had a slightly excentric germ-pore.

In the literature 'Naucoria' pediades is recorded in Colenso (1886) and Massee (1898) but this taxon has undoubtedly been confused in the past. Colenso b 113 is a mixed collection of which the smaller element refers to A. pediades; the other part of b 113 refers to A. semiorbicularis q.v.

As Agaricus pediades, Napier, Colenso b 113 pro parte & b 269; as Agaricus semiorbicularis, Napier, Colenso 1053.
No descriptions of the macroscopic characters are available for New Zealand collections and therefore the determination is based solely on microscopic characters. For the characters of basidiomata in the field readers are referred to European literature, e.g. Walling (1982). A. semiorbicularis is delimited by the following combination of microscopic characters:

a. Broadly ellipsoid to ovoid basidiospores 10.5-14 x 7-8(-10) µm,

b. Basidia mostly 2-spored,

c. Absence of pleurocystidia and

d. Lageniform cheilocystidia with ± subcapitate head.

It is widespread on lawns and in grasslands. Details of the New Zealand collection are as follows;-

Basidiospores 14-16 x (8-)8.5-ll µm, ellipsoid-ovoid, medium ochraceous in water, darker in aqueous alkali, smooth; germ-pore distinct. Basidia 2-spored, a few 3- and 4-spored basidia seen, 25-30 x 7.5-10 µm. Cheilocystidia 20-30 x 5-7.5 µm, ampulliform with slightly swollen obtuse apex (3-5 µm broad); pleurocystidia absent. Caulocystidia subcapitate to slightly swollen at apex, 20-30 x 6-8 µm, apex 4-5 µm.

Agaricus semiorbicularis is recorded in the literature by both Colenso (1890) and Massee (1898).

This species is recorded in both Colenso (1890), and Massee (1898).

A. temulenta is sporadically recorded in Europe in grassy places, often in previously disturbed areas and one of us (RW) has seen a recent collection from North America (New York State). It is easily recognised when young by the uniformly bright ochraceous yellow pileus and stipe, which fade and become flushed with saffron, and the stuffed stipe with tough cortex. The basidiospores, (10.5-)11-13(-14.5) x (6.5-)7.5-8.5(-9) µm, are ellipsoid and basidia 2-or 4-spored.

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Agaricus pediades Fr.
Agrocybe pediades (Fr.) Fayod 1889
Agaricus pediades Fr. (1821)
Agrocybe pediades (Fr.) Fayod 1889
Agaricus semiorbicularis Bull. (1789)
Agaricus semiorbicularis Bull.
Agrocybe pediades (Fr.) Fayod 1889
Agaricus temulentus Fr.
Agrocybe pediades (Fr.) Fayod 1889
Agrocybe pediades (Fr.) Fayod 1889
Agrocybe pediades (Fr.) Fayod (1889)
Agrocybe pediades (Fr.) Fayod 1889
Agrocybe pediades (Fr.) Fayod 1889
Agrocybe pediades (Fr.) Fayod (1889)
Agrocybe pediades (Fr.) Fayod 1889
Agrocybe pediades (Fr.) Fayod 1889
Agrocybe pediades (Fr.) Fayod 1889
Agrocybe pediades (Fr.) Fayod (1889)
Agrocybe pediades (Fr.) Fayod 1889
Agrocybe pediades (Fr.) Fayod (1889)
Agrocybe pediades (Fr.) Fayod 1889
Agrocybe pediades (Fr.) Fayod (1889)
Agrocybe pediades (Fr.) Fayod 1889
Agrocybe pediades (Fr.) Fayod 1889
Agrocybe pediades (Fr.) Fayod (1889)
Agrocybe semiorbicularis (Bull.) Fayod
Agrocybe pediades (Fr.) Fayod 1889
Agrocybe temulenta (Fr.) Singer
Agrocybe pediades (Fr.) Fayod 1889
Naucoria pediades (Fr.) P. Kumm.
Agrocybe pediades (Fr.) Fayod 1889
Naucoria pediades (Fr.) P. Kumm. (1871)
Agrocybe pediades (Fr.) Fayod 1889
Naucoria semiorbicularis (Bull.) Quél.
Agrocybe pediades (Fr.) Fayod 1889
Naucoria temulenta (Fr.) P. Kumm.
Agrocybe pediades (Fr.) Fayod 1889

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Agrocybe pediades (Fr.) Fayod 1889
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1cb1aeb5-36b9-11d5-9548-00d0592d548c
scientific name
Names_Fungi
1 January 2000
28 October 2023
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