Hypoxylon subrutilum Starb.

TELEOMORPH | CULTURES AND ANAMORPH | SPECIMENS EXAMINED | NOTES

NOTES

Hypoxylon subrutilum was treated as a synonym of H. haematostroma Mont. by Miller (1961). Miller's concept is not accepted owing to the types of these two names being quite different except for having similar ascospore size ranges. Miller (1961) published a nomen novum, H. rubrostromaticum, to replace one of the two illegitimate names, H. glomerulatum Theiss. and H. haematites Lév. ex Theiss., which were listed in his monograph as synonyms. They are later homonyms of H. glomerulatum Bull. and H. haematites Lév. ex Cooke, respectively. Unfortunately, he did not unequivocally indicate which he intended to replace. Since he took the photograph (Pl. 4, Fig. 12 in his monograph) from the type of H. haematites Lév. ex Theiss., we consider that H. rubrostromaticum is a nomenclatural substitute of H. haematites Lév. ex Theiss. Although he cited Usteri's collection no. 121a as the type of H. rubrostromaticum, this material unfortunately is the holotype of H. diatrypeoides Rehm (see NOTES on H. diatrypeoides).

A Theissen exsiccatum, Dec. Fung. Bras. no. 123, was cited as the type of H. glomeratum Theiss. by Miller (1961); this is accordingly accepted as the lectotype.

Hypoxylon anthochroum and H. subrutilum have very similar anamorphs. Their ascospore size ranges appear to be parts of a continuum. Hypoxylon subrutilum can be distinguished from H. vogesiacum in lacking a dotted band along the germ slit, in having a thick perispore with coil-like ornamentation and in having apparent greenish or olivaceous stromatal pigments.

The anamorph that we obtained is identical to that described by Martin (1969a) [as H. rubrostromaticum]. See also NOTES on H. brevirimum.