This is an unknown Caliciopsis sp
AC 275, 557, 716, 1978, 2473 and GCAC 97. All specimens collected on Prunus exudate in PEI except for GCAC 97 on Prunus exudate at Caledonia Gorge in NB.
Ascomata urn shape (urcelliform), when fresh orange to yellow colour and dries to dark brown, 300-350×200-250µm at apex,160u wide at basal attachment, peridial cells textura elongata at apex; asci uniseriate with possibly a small apical plug, 50-60×3-4µm, no reaction in Lugols; paraphyses filiform, 60-70×1-2µm; spores hyaline oblate (flattened on two sides, elliptic in side view and spherical in face view) 5x3x2µm collect in a yellow white dry mass around ostiole (maezidium).
A colony in PEI has persisted over 15 years in the same location. Mature fruit bodies have been found in spring, summer and fall.
Benny, Gerald L. et al. 1985. Studies on the Coryneliales. IV. Caliciopsis, Coryneliopsis, and Corynelipspora. Botanical Gazette 146: 437-448.
Fitzparick Harry Morton, 1942. Revisionary studies in the Coryneliaceae. II. The genus Caliciopsis. Mycologia 34: 355-488.
Funk A. 1963. Studies in the genus Caliciopsis. Can. J. Bot. 44: 503-543.