University of Illinois, Illinois Natural History Survey Fungarium (ILLS)
ILLS00121255
82798
Ionomidotis fulvotingens (Berk. & M.A. Curtis) E.K. Cash
Helotiaceae
Jason M. Karakehian
Jason Karakehian
13102503
2013-10-25
25 Oct 2013
United States, Massachusetts, Worcester, Blackstone, 286 Mendon Street, Daniels Farmstead
Living trees in the vicinity: Betula lenta, Fagus grandifolia, Acer saccharum, Pinus strobus. Mixed forest, secondary growth (old pastureland).
On underside of decorticated log
host: Unknown
Duplicate and cultures sent to Kadri Pärtel (Chair of Mycology, Department of Botany, Institute of Ecology and Earth Sciences, University of Tartu, Estonia) and received by her on Dec 20, 2013. Observations from living collection. Apothecia 3 – 4 mm diam, arising from a common base or solitary and sessile. Hymenium lemon-yellow with a white felty margin, darkening from the center outward with brown tones in age. Excipulum felty or pruinose, lemon-yellow as the hymenium then darkening orange-brown in age. In 3% KOH releasing a red exudate. I think this exudate is from the matter that surrounds the outermost cells of the ectal excipulum dissolving in the KOH. Asci J- in Melzer’s reagent, slightly thickened apices, clavate, 8-spored, arising from croziers, 38-41 x 5 μm. Paraphyses straight, filiform, extending slightly beyond the asci, 1.3 μm diam, gel at apices? Ascospores 5.7 x 1.9 μm, hyaline, smooth, with one guttule at each pole, fusiform-cylindric, straight or slightly curved. Medullary excipulum – textura intricata, composed of thick-walled gelatinous hyphae somewhat loose under the hymenium then denser toward the flanks where it gives rise to the cells of the ectal excipulum. Ectal excipulum clearly differentiated from the tissues of the medullary excipulum, up to 87 μm thick in places.