A Contribution to the Moss Flora of Peru, including a New Species of Dicranum

Abstract

Dicranum gregoryi, a new species in the Orthodicranum-group of Dicranum, Campylopus benedictii, Leptodontium viticulosoides var. exasperatum, and Brachythecium austrosalebrosum, are reported from Peru along with fourteen additional departmental records. In view of Peru's tropical locality and immense vertical relief, its moss flora, of approximately 820 species (Mario Menzel, pers. comm), is surprisingly small. However, the number of mosses known from Peru is steadily increasing as specific groups in Peru are studied (Frahm 1984; Frahm & Hegewald 1979; Griffin & Hegewald 1986; Pursell & Hegewald 1979) and additional collections are made (Hegewald & Hegewald 1977, 1985; Menzel 1986; Menzel & Schultze-Motel 1986, 1987). Some indication of the potential richness of the Peruvian moss flora is evident in a small (66 numbers) collection made by Gregory K. Allen in the Peruvian departments of Ancash and Cuzco. This collection contained a new species of Dicranum, three Peruvian records, and fourteen departmental records, which are reported alphabetically in the following list (records for Peru are marked by an asterisk). A complete set of these mosses is deposited in the herbarium of B. Allen. Duplicates of the mosses reported in this paper are at Mo. All collections were made by G. K. Allen at three sites. To simplify citation of specimens, the following abbreviations are used: Yungay-ca. 16 km E of Yungay, 4,267 m, 24, 25, 28 June 1984; Ishinca--Quebrada Ishinca, ca. 9.6 km NE of Huaraz, 8 July 1984; Machu Picchu-ca. 3 km E of Agua Caliente, 18 July 1984. ANOMOBRYUM FILIFORME (Dicks.) Solm. in Rabenh. ANCASH: Yungay, on ground, 4342a. Previous departmental records: Amazonas, Apurimac, Arequipa, Ayacucho, Cajamarca, Cuzco, Junin, La Libertad, Lima, Madre de Dios, Pasco, and Puno. BARTRAMIA ANGUSTIFOLIA Mitt. ANCASH: Ishinca, on ground, 4295a. This species is similar to B. longifolia. It differs in the typically deciduous upper limb, its non-reflexed upper leaf margins, and the presence of a narrow basal leaf margin of large, hyaline cells. It is also known from the department of Amazonas as well as from Ecuador and