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SUMMARY This paper records 10 taxa of the genus Rosellinia from India, viz.: R. aquila, R. thelena, R. himalayensis, R. apiculata var. macrospora, R. corticium, R. sublimbata, R. indica, R. thindii, R. mammiformis and R. medullaris. In addition to the morphology of the stromata, anatomy is also described for each species. A key to the taxa included is given. Of these R. himalayensis, R. indica and R. thindii are described as new species, R. apiculata var. macrospora as a new variety. The remaining six species are new records for India. De Notaris (1844) described the genus Rosellinia (Xylariaceae, Sphaeriales), based on Sphaeria aquila Fr. Subsequently several pyrenomycetes with globose ascocarps, with or without well-developed stroma, were included in the genus. Saccardo (1882) divided the genus into 10 subgenera based mainly upon the features of perithecia and subiculum. Miller (1928) for the first time showed the presence of a definite stroma around the perithecium in species of Rosellinia and considered them close to species of Hypoxylon. Martin (1967) suggested also that there were close affinities of species of Rosellinia with Miller's section Primocinerea of Hypoxylon. Martin proposed a new section, Entoleuca in the genus Hypoxylon, embracing species of Rosellinia, species of section Primocinerea of Hypoxylon, and a few other species of different groups. We have treated Rosellinia and Hypoxylon as separate genera following Dennis (1968) and Mfiller and Arx (1973). Rosellinia was previously represented in India by 13 species. None was reported from the northwestern Himalayas except for two incompletely known species, R. andurensis Ces. & de Not. and R. bonaerensis Speg. These two species are listed in the "Fungi of India" by Butler and Bisby (1931), and are stated to be reported from Dehradun and Nainital respectively. The original material of both these collec

(1957). The Myxomycetes of the Mussoorie Hills. IV. Mycologia: Vol. 49, No. 1, pp. 128-133.

Duosporium cyperi gen. et sp. nov., collected on Cyperus iria Linn., is characterized by the production of 2 types of conidia, macroconidia and microconidia. The macroconidia are straight, cylindrical, triseptate, with their middle cells dark brown, long, thick-walled, and end cells much paler or subhyaline, short, thin-walled, the middle and the end cells being equally wide. The microconidia are nonseptate, spherical, dark brown, prominently verrucose, and produced apically on the conidiophores like the macroconidia; occasionally also formed as secondary conidia on germinating 3-septate macroconidia in culture. The formation of 2 distinct types of conidia in Duosporium and the features of its macroconidia characteristically differentiate it from its close relative Helminthosporium, although Duosporium cyperi is not unique among fungi in producing 2 types of conidia.

This paper records additional species of the Helotiales from the Mussoorie Hills (5000-7500 ft altitude in the North Western Himalayas) as a part of the study of the fungus flora of that region undertaken by the senior author and his students. The first contribution (2) described eight known species. This second contribution deals with three new species belonging to Midotis, Helotium and Rutstroemia. The fruit bodies are described from fresh material as well as from that

(1957). The Pezizaceae of the Mussoorie Hills (India). V. Mycologia: Vol. 49, No. 6, pp. 831-836.

(1959). The Myxomycetes of the Mussoorie Hills (India). X. Mycologia: Vol. 51, No. 2, pp. 159-162.