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 Crocicreas macrostipitatum
BiostatusPresent in region - Indigenous. Endemic
Images (click to enlarge)
Caption: FIG. 1. e, f. Crocicreas macrostipitatum (PDD 49105). e. Vertical section showing one side
of upper part of an apothecium. f. Paraphyses, asci, and released ascospores. | 
Caption: FIG 2. Macroscopic appearance of apothecia (x 50), Crocicreas macrostipitatum (PDD 49105). |
Article: Johnston, P.R. (1989). Some tomenticolous Crocicreas species from New Zealand. Memoirs of the New York Botanical Garden 49: 108-111.
Description: Apothecia developing amongst tomentum of leaf on abaxial surface, found on dead leaves or
on necrotic tips of otherwise green leaves. Base of apothecium remains immersed in leaf
tissue. Apothecium 0.4-0.6 mm wide, up to 2 mm high, long stipitate, stipe tapering gradually
to base, receptacle urceolate, margin collarette-like, extending above level of hymenium.
Apothecium yellow-brown to dark-brown, with a few crystals scattered near margin of
receptacle. Ectal excipulum up to 80 µm wide at sides of receptacle, extending down stipe,
mostly comprising narrow, 1-2 µm diam. hyphae widely spaced in hyaline gel. Innermost
layers of wider, 2-4 µm diam. hyphae embedded in pale-brown gel. Medullary excipulum
extending down stipe, up to 10 µm wide near top of stipe, comprising thin-walled, cylindric,
nongelatinous, yellow-brown, 2-3 µm diam. hyphae with finely roughened walls. Narrow
medullary layer extends to margin of receptacle, less than 5 µm wide above hymenium, and
here comprising 2-3 rows of yellow-brown, long cylindric cells which have numerous short, 2-4 µm long, divarications.
Center of stipe comprises nongelatinous, loose, disorganised,
hyaline tissue, similar to that of the subhymenium. Asci 45-56 x 4-5.5 µm, cylindric, wall
slightly thickened at rounded apex, apical pore amyloid, 8-spored. Ascospores 6-9 x 2 µm,
elliptic to subclavate, tapering slightly toward base, hyaline, 1-septate. Paraphyses 2-2.5 µm
diam., cylindric or slightly wider in upper half, extending up to 5 µm beyond asci.
Notes: Etymology. macrostipitatum, refers to long stipe of apothecium.
NOTES. The shape of the receptacle, with its collarette-like margin, is similar to that seen in
Crocicreas epitephrum. Crocicreas macrostipitatum differs in having a long stipe, apothecia
erumpent from the leaf surface, and 1-septate ascospores.
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