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In the present paper, the author describes a new species of Salvinia, S. herzogii, on Argentine material from Lower Paraná River. It is probable that all specimens of this country determined S. auriculata Aublet, belong to this new species. A key for identification of S. herzogii and related species according to the leaf characters and configuration of the submerged organs is given. [ABSTRACT FROM AUTHOR]

In the present paper, the fourth of the series which started with a study of the sporophyte of Salvinia oblongifolia, the author reports some data on the following aspects of S. rotundifolia: anatomy of the rhizome and submerged organ. Comparative data on its related species, S. herzogii, are given. [ABSTRACT FROM AUTHOR]

In the present paper, the second of the series with started with a study of the sporophyte of S. oblongifolia, the author repords some dates and adds comments of the following aspects of S. auriculata: leaf dimorphism, venation, experiments of decapitation of the submerged organs and the lateral branches; leaf anatomy with the special emphasis on the development air chambers and hair and papilla formation; ramificación of the submerged organs and its significance for the identification of S. auriculata and related species [ABSTRACT FROM AUTHOR]

This is the first from a series of papers dealing with the comparative study of all neotropical species of Salvinia. In the first part, the author comments the systematic position of all the species mentioned so far for tropical America. In the second part, the morphology and structure of the sporophyte and its reproductive organs of Salvinia oblongifolia are studied. This species lives in the center-north and NE of Brazil. [ABSTRACT FROM AUTHOR]

Thirty species of Inoperculate Discomycetes are described herein from the Nahuel Huapí National Park (Argentina), distributed among thirteen genera belonging to the following families: Hyaloscyphaceae, Dermataceae, Sclerotiniaceae y Helotiaceae. Three of them, namely, Calloria, Sphagnicola and Phaeohelotium are recorded for the first time for Argentina. Of the thirty species found, fifteen are new records for this country. The following new combinations are proposed: Cyathicula chlorosplenioides (Speg.) Gamundí (basinym: Helotium chlorosplenioides Speg.); Rutstroemia megalospora (Speg.) Gam. (bas.: Helotium megalosporum Speg.) y Rutstroemia microsperma (Speg.) Gamundí (bas.: Helotium microspermum Speg.). The paper contains a critical study of type material from Spegazzini's herbarium, and the description of a new species of the same general area: Phaeohelotium castaneum. [ABSTRACT FROM AUTHOR]

In this short paper, the author reports the presence of Notholaena sulphurea (Cav.) J. Sm. in NW and W Argentina (Jujuy and La Rioja Provinces). A key for the Argentine species of that genus, is also given. [ABSTRACT FROM AUTHOR]