Coll. AD 110518-1 © A. Parker

Donadinia nigrella (Seaver) M. Carbone, Agnello & P. Alvarado, Ascomycete.org, 5 (1): 6 (2013).

Basionym Paxina nigrella Seaver, N. Amer. Cup-fungi (Operc.): 208 (1928).

Diagnosis Apothecia scattered, shallow cup-shaped, with the margin more or less wavy, externally brownish-black, clothed with inconspicuous hairs, reaching a diameter of 2-3 cm. and a depth of about 1 cm. or less, becoming strongly wrinkled when dry (externally closely resembling Pseudoplectania vogesiaca); hymenium concave, black; stem reaching a length of 3-4 cm. and a diameter of 2-3 mm. of nearly uniform thickness throughout its entire length, roundish or angular, clothed like the outside of the apothecium with brown hairs and attached at the base with a dense mass of coarse, black mycelium; hairs pale-brown, septate, thin-walled, flexuous, reaching a diameter of 10 µ; asci cylindric above, gradually tapering below, reaching a length of 500 µ and a diameter of 20 µ; spores 1-seriate, parallel with the ascus, ellipsoid, usually containing two small oil-drops and numerous granules, hyaline or faintly yellowish, 15 × 30-35 µ; paraphyses numerous slightly enlarged at their apices, dark-brown, reaching a diameter of 4-5 µ.
On rotten wood in coniferous woods.

Type ex herb. Seaver (NY) - holotypus

Homotypic Plectania nannfeldtii Korf, Mycologia, 49 (1): 109 (1957) ; Macropodia nigrella (Seaver) Teng, Fung. China: 762 (1963) ; Helvella nigrella (Seaver) F.L. Tai, Syll. fung. Sin.: 157 (1979) ; Macroscyphus nigrellus (Seaver) Z.S. Bi, Macrofung. Fl. N. Guangdong: 26 (1990).

MycoBank 801344

Classification: Sarcosomataceae, Donadinia

Created on 28/05/2015.

Updated on 01/08/2023.