Entoloma reginae (Basidiomycetes, Agaricales), a new species from the Netherlands

3 Pages·1996·0.35 MB·English

by  Noordeloos, Machiel E

BLUMEA 41 (1996) 7-9
Entolomareginae (Basidiomycetes, Agaricales),
a new species from the Netherlands
Machiel+E. Noordeloos
Rijksherbarium/Hortus Botanicus,Leiden,TheNetherlands
INTRODUCTION
Theknowledge ofthemacrofungi (mushrooms andtoadstools) inEurope, including
theNetherlands, is stillfarfrom complete. During ourstudies on this groupofor-
ganisms in theNetherlandsandadjacent Belgium and Germany whilepreparing a
critical identificationwork, theFloraagaricina neerlandica, a fairlylarge numberof
newspecies hasbeen discovered, and alot morehas becomeknown onthe varia-
bility, distributionandecology oftheabout2,000 otherspecies thatwill eventually
be includedin this Flora. Inthe period 1987-1996four volumes havebeen com-
pleted ofthisstandard work (Baset al., 1988, 1990,1995,1996), three are in prepa-
ration, andwe hope thatearly inthetwenty-first century, the setof 10volumeswill
befinished.Thepresentpaperdealswith a very strikinglittleEntolomaspecies re-
cently discoveredinDiever, provinceofDrenthe, theNetherlands.
Entolomareginae Noordel.& Chrispijn, spec. nov.
Pileus ad 10mmlatus,convexus,plicatus, haud distinctehygrophanusnectranslucido-stria-
tus,pallidegriseo-brunneus,totomicaceo-pruinosulus.Lamellae arcuato-decurrentes,reduc-
tae, venosae,albeae demum pallideroseae.Stipes 20-30x 1 mm,cylindraceus, hyalinus,
albidus,ad apicempruinosus.Sporae8.0-10.0 x 7.0-8.5 pm,Q= 1.0-1.1-1.25,(sub)iso-
diametricae,5-7-angulatae,crassi-tunicatae. Basidia 28-40x9-13 pm,4-sporigera,fibu-
lata. Acies lamellarum fertilis.Cystidia desunt.Pileipellisecutis hyphis 3.0-9.0 pm latis
constituis pigmentobrunneo incrustatovel intracelluloso formata. Stipitipelliscutishyphis
cylindraceis, 4.0-7.0 pm latis constituis. Caulocystidia numerosa20-40x 2.0-7.0 pm,
cylindraceavel clavata. Fibulae abundantes. Habitatin pratis. —Holotypus:R. Chrispijn,
9-VII-1994, 'Diever,prov. Drenthe,Netherlands' (L).
Pileusc. 10mm broadconvex withsomewhatplicate, straight margin, not distinctly
hygrophanous, not translucently striate, pale greyish brown, finely micaceous-sub-
pruinose all over. Lamellae, L =up to 16, arcuate-decurrent, vein-like, whitish to
very pale pink withentire, concolorousedge. Stipe 20-30by 1 mm, cylindrical,
hyaline, white, whitepruinose inapical part.
Spores 8.0-10.0 x 7.0-8.5pm, Q = 1.0-1.1-1.25, (sub)isodiametrical, 5-7-
angled in side-viewwith ratherthickwalls.Basidia28-40 by 9-13 pm, 4-spored,
clamped. Lamellaedge fertile.Cystidia absent. Hymenophoral tramaregular, made
upofrather short, inflatedelements, 40-100by 9-15 pm. Pileipellis a cutis with
someascending terminalelements,madeup ofcylindrical, 3.0-9.0pm widehyphae
withsome clavateterminalelements.Pigment brown, membranal, sometimesfinely
incrusting and intracellular, sometimesin theformofsmallgranules. Stipitipellis a
8 BLUMEA Vol. 41,No. 1, 1996
Entoloma reginaeNoordel. & Chrispijn. Habit,spores and basidia. All drawn from the holotype.
Bar= 10mmand 10µm,respectively.
cutis ofnarrow, cylindrical, 4.0-7.0pm wide hyphae. Caulocystidia numerous at
apexofstipe, 20-40by 2.0-7.0pm,cylindrical to clavate, atveryapexmixedwith
fertilebasidia. Clamp-connections numerous.
Etymology —Namedtocommemorate theopening ofthe VanSteenisBuilding by
HerMajesty Queen BeatrixonJune 11, 1996.
Distribution—Sofaronly knownfrom thetypelocality.
Habitat—Single ingrassalong cycling path.
Vernacularname—Koninginnesatijnzwam (Dutch).
Note— Entolomareginae has somevery unusualfeaturesthatmakeitwell worth
publishing as anewspecies, although thetypecollectionconsists ofonly two speci-
mens. Itcannot benamedwiththekey intheFloraagaricinaneerlandica(Noordeloos
in Bas etal., 1988)nor doesitfigure intherecent European monograph ofthegenus
(Noordeloos, 1992). Macroscopically Entolomareginae isratheraberrant withits
venose, decurrentlamellaeandopaque, somewhatpruinose, slightly plicate pileus,
reminding ofa Delicatulaspecies. Microscopically itmustbe ranged insubgenus
Nolaneaon account ofthe relatively simple pileipellis type. The opaquepileus re-
mindsofEntolomanitens,whichhas similarspores,butmore distinctly pigmented
basidiocarps and greyishpink, well-developed lamellae.
Collectionexamined.—THENETHERLANDS.Prov.Drenthe,alongcycling pathDiever-Hoeken-
brink, 9 July 1994,R. Chrispijn (L).
M.E.Noordeloos: Entoloma reginae, spec. Nov. 9
REFERENCES
Bas,C.,Th.W.Kuyper, M.E.Noordeloos & E.C.Vellinga(eds.). 1988.Floraagaricinaneerlandica,
vol. 1.Entolomataceae. Balkema,Rotterdam-Brookfield.
Bas,C., Th.W.Kuyper,M.E.Noordeloos & E.C.Vellinga(eds.). 1990.Flora agaricinaneerlandica,
vol. 2.Pleurotaceae,Pluteaceae,Tricholomataceae 1.Balkema,Rotterdam-Brookfield.
Bas, C., Th.W.Kuyper, M.E.Noordeloos & E.C.Vellinga(eds.). 1995.Flora agaricinaneerlandica,
vol. 3.Tricholomataceae 2.Balkema,Rotterdam-Brookfield.
Bas,C., Th.W.Kuyper, M.E.Noordeloos &E.C.Vellinga(eds.). 1996.Floraagaricinaneerlandica,
vol. 4.Strophariaceae,Tricholomataceae 3.Balkema,Rotterdam-Brookfield.
Noordeloos. M.E.(1992).Entoloma s.l.In:M.Candusso (ed.),FunghiEuropaei,vol. 5.Giovanna
Biella,Saronno.