Kretzschmaria deusta (Hoffm.: Fr.) P. Martin



Kretzschmaria deusta (Hoffm.: Fr.) P. Martin, J. S. African Bot. 36: 80. 1970.

º Sphaeria deusta Hoffm., Veg. Crypt. I, p. 3. 1787; Hoffm.: Fr., Syst. Mycol. II, p. 345. 1823; non Wahlenberg, 1812.

º Nemania deusta (Hoffm. : Fr.) S. F. Gray, Nat. Arr. Brit. Pl.: 516. 1821.

º Discosphaera deusta (Hoffm.: Fr.) Dumort., Comment. Bot., p. 91. 1822.

º Stromatosphaeria deusta (Hoffm.: Fr.) Grev., Fl. Edin., p. 355. 1824.

º Hypoxylon deustum (Hoffm.: Fr.) Grev., Scot. Crypt. Fl. VI, Pl. 324, Fig. 2. 1828.

º Ustulina deusta (Hoffm.: Fr.) Lind, Danish Fung., p. 252. 1913.

= Sphaeria maxima, convexa, nigerrima Haller, Hist. Stirp. Helv. 3: 122. 1768; [nom. illegit., ICBN Art. 23.1 & 23.6]. Fide Tulasne and Tulasne (1863).

= Sphaeria maxima Weber, Spic. Fl. Goett., p. 286. 1778. Fide Persoon (1801), Fries (1823).

º Ustulina maxima (Weber) Wettst., Verh. Zool.-Bot. Ges. Wien 35: 592. 1885.

º Nemania maxima (Weber) House, New York State Mus. Bull. 266: 48. 1925; as "(Haller) House"

= Sphaeria versipellis Tode, Fung. Meckl. Sel. II, p. 55. 1791. Fide Persoon (1801), Fries (1823), Tulasne and Tulasne (1863).

= Hypoxylon ustulatum Bull., Hist. Champ. France I, p. 176. 1791. Fide Persoon (1801), Fries (1823), Tulasne and Tulasne (1863).

º Ustulina vulgaris Tul. & C. Tul., Sel. Fung. Carp. II, p. 23. 1863.

= Sphaeria albodeusta Wahlenb., Fl. Suec., p. 1001. 1826. Fide Fries (1832).

= Hypoxylon magnosporum C. G. Lloyd, Mycol. Writings 6: 1054. 1921.

Stromata pulvinate to effused pulvinate, discrete, densely aggregated or fused, 0.5 to more than 10 cm diam x 0.8-4 mm thick, attached to substrate with narrow connectives, usually with crenate, sloped margins; surface dull copper brown, dark brown to blackish brown, often with reticulate major cracks; carbonaceous immediately beneath surface; tissue between and beneath perithecia coriaceous to woody, white to gray, becoming dark brown and disintegrating.

Perithecia spherical to obovoid, 0.7-1.5 mm diam x 1-2 mm high.

Ostioles papillate to coarsely papillate.

Asci 410-480 mm total length x 10-14 mm broad, the spore-bearing parts 170-210 mm long, the stipes 200-260 mm long, with apical ring bluing in Melzer's iodine reagent, urn-shaped, 4-6 mm high x 3-4 mm broad.

Ascospores brown to dark brown, unicellular, fusoid-inequilateral, with acute ends sometimes pinched, smooth, 27-35(-38) x 7-9 mm, with straight germ slit much less than spore-length.