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 Marasmius meridionalis
BiostatusPresent in region - Indigenous. Endemic
Images (click to enlarge)
Caption: Marasmius meridionalis Horak & Desjardin (CANB, holotype): 1, basidiomes (nat. size); 2, basidiomes (x4), 3. basidiospores (x2000), 4. basidia (x1000): 5, hymenial cystidia (x1000); 6, pileipellis with pilocystidia (x1000); 7, caulocystidia (x1000). | 
Caption: Dried type specimen
Owner: Herb PDD |
Article: Horak, E.; Desjardin, D.E. (1994). Reduced marasmioid and mycenoid agarics from Australasia. Australian Systematic Botany 7: 153-170.
Description: Pileus usque ad 3 mm latus, minutus, convexus
subcupuliformis, albus, velutinus vel minute substrigosus, siccus. Lamellae
rarae, subvenosae vel nullae, hymenium glabrum, album, velutinosum. Stipes usque
ad 10 X ad 0.2 mm, centralis, cylindricus, apicaliter albidus, basin versus
niger, ad apicem pruinosus, deorsum levis, siccus, tenax. Inodorus. Basidiosporae
6-7.5 X 2.5-3 µm, subellipticae vel virguliformes. leves, hyalinae, inamyloideae.
Basidia 15-20 X 5 µm, tetrasporica, fibulata. Cystidia hymeniales rara, 30-50
X 5-6 µm, fusiformia apice subglobosa (up to 6 µm diam.), tenuitunicata, hyalina.
Pileipellis hymeniformis e cellulis clavatis vel subfusiformibus, 15-30 X 8-15
µm, dense diverticulata tenuitunicata, hyalina. Pilocystidia numerosa, 35-45
X 7-12 µm, cystidiis hymeniales similia. Caulocystidia rara, 15-25 X 5-7 µm,
cystidiis hymenialibus similia. Ad folia putrida Nothofagi cliffortioides.
Novazelandia. PDD, holotypus.
Habitat: On rotten leaves of Nothofagus solandri
var. cliffortioides (Hook. f.) Poole. Known from South Island of New
Zealand.
Notes: Marasmius meridionalis belongs in sect. Epiphylli subsect. Eufoliatini Singer (1976). It is characterised
by forming very small basidiomes with smooth hymenophores, fructifications on
leaves of Nothofagus, small basidiospores, weakly dextrinoid tissue in
the stipe apex, and a pileipellis composed of setulose cells plus capitate pilocystidia.
Marasmius meridionalis differs from all other taxa in the section in
the combination of a smooth hymenophore and setulose pileipellis cells. The
European M. epiphylloides (Rea) Saccardo & Sydow is similar in some
respects, but differs in forming well-developed lamellae, fructifications on
leaves of Hedera, and in having thick-walled pilocystidia, inamyloid
stipe tissues, and basidiospores 11-15 µm long
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