Paulo G. Windisch

Aspectos ecológicos de Alsophila setosa Kaulf. (Cyatheaceae, Pteridophyta) no Rio Grande do Sul, Brasil

Alsophila setosa Kaulf. is a tree fern occurring in the primary and secondary forest formations in South and Southeastern Brazil. The present study discusses population structure, architecture of the underground parts as well as herbivory of fronds and epiphytic species. Fieldwork was performed in two secondary forest tracts in the municipalities of Morro Reuter and Sapiranga in the state of Rio Grande do Sul, Brazil. Contiguous 100 m2 plots were surveyed as to the occurrence of A. setosa and plants sizes. Two samples, of 45 plants in Morro Reuter and 48 in Sapiranga, were examined throughout a full year cycle as to herbivory on their fronds. Five plants were uprooted for the study of the underground structures. The epiphytic plants on the caudexes were recorded and sampled. The underground structure is complex, with caulinar branches that may form new plants, leading to an increase of the number of individuals in a stand and to an aggregate spatial distribution. A larger number of smaller plants was recorded. Herbivory damage was observed on 28.88% of the plants in Morro Reuter and 35.41% in Sapiranga. As to vascular epiphytes, 16 species were found, with a predominance of holoepiphytes. This role as phorophyte is of special importance for the conservation of some the epiphytic species.

Estrutura populacional e desenvolvimento da fase esporofítica de Cyathea delgadii Sternb. (Cyatheaceae, Monilophyta) no sul do Brasil

Cyathea delgadii Sternb. is a tree fern that grows in primary and secondary forests from Norhteastern to Southern Brazil. This study discusses the population structure and development of the sporophytic phase (caudex growth, frond production, phenology of spore production) of C. delgadii in a secondary forest in the State of Rio Grande do Sul, Brazil, based on observations of 41 plants during a 13 month period. The species had an aggregated spatial distribution pattern and higher frequency of smaller individuals, indicating high potential for population regeneration. On average, the caudex of plants grew 4.65 cm year-1, and the highest growth rates were recorded for taller plants. The similar frond production rate (5.75 fronds year-1) and senescence rate (4.92 fronds year1) reflect the capacity to maintain a stable number of fronds. Only a few plants formed fertile fronds, while spore production and liberation occur in an asynchronous pattern.

Growth Rates and Age Estimates of Alsophila setosa Kaulf. in Southern Brazil

ABSTRACT The tree fern Alsophila setosa, occurs in primary and secondary forests of southern and southeastern Brazil. Two populations in secondary forest formations in the northeastern part of the State of Rio Grande do Sul, in the municipalities of Morro Reuter (45 plants) and Sapiranga (48 plants), were studied to estimate the ages of the plants. Two approaches were tested, one based on the total length in relation to the yearly growth rate of the caudex, and the second on the total number of scars and remains of stipe bases along the caudex in relation to the yearly frond production. Estimates based on growth rates and total length did not agree with the information and records of the past land use, whereas frond production over a longer time period presented acceptable estimates. The development of a new plant formed through vegetative reproduction was observed during three years. A brief discussion of the problems of age estimates in tree ferns is presented.

Pteridófitas do Estado de Mato Grosso, Brasil: Vittariaceae

Pteridophytes of the State of Mato Grosso, Brazil: Vittariaceae). The family Vittariaceae is represented in the State of Mato Grosso, Brazil, by the genera Anetium, Antrophyum, Hecistopteris (a single species each) and Vittaria (with three species). Keys of the genera and species, brief descriptions, illustrations, as well as comments on the distribution and habitats are presented.

Problemas de conservação das espécies dos gêneros Froelichia Moench e Froelichiella R.E. Fries (Amaranthaceae) no Brasil

The state of conservation of the representatives of the genera Froleichia Moench and Froelichiella R.E. Fries (Amaranthaceae) in Brazil is discussed based in the criteria of International Union for Conservation of Nature and Natural Resourses (IUCN). Most of the species can be considered as vulnerable, but may also present more serious problems on a regional basis, while some species should be considered as probably extint (EX), criticaly endangered (CR) or endangered (PE) at least in large part of their original distribution range.

Isoetes mourabaptistae, a New Species from Southern Brazil

Abstract Isoetes mourabaptistae, a new species from southern Brazil, is described, illustrated, and compared to the most similar species. This new species is apparently restricted to southern Brazil, and is characterized by cristate to irregularly reticulate megaspores and microechinate microspores. It is an aquatic plant, occurring among submersed rocks along rivers, at about 900–1100 m in elevation.

Pteridófitas da região noroeste do Estado de São Paulo, Brasil: Dennstaedtiaceae

This work is part of a series of studies on pteridophytes of the North-western region of the State of Sao Paulo. The representatives of the family Dennstaedtiaceae are found mainly at the margins of the ciliary forests as well as in humid and shaded ravines, except for Pteridium which, generally occurs in open and sunny places. The genera Dennstaedtia with two species (D. cicutaria (Sw.) Moore and D. globulifera (Poir.) Hieroni), Lindsaea with three species (L. lancea (L.) Bedd., L. quadrangular is Raddi and L. stricta (Sw.) Dryand.), and Pteridium with a species and variety (P aquilinum (L.) Kuhn var. arachnoideum (Kaulf.) Brade), have been found in this region. Descriptions, illustrations, identification keys, geographical distribution, and habitats of each species are presented.

Elaphoglossum montanum, a New Species from Southern Brazil

Abstract Elaphoglossum montanum, a new fern species of the Atlantic Forest in southern Brazil, is described, illustrated, and compared to the most similar species. It belongs to the Elaphoglossum “Subulate scales clade” and occurs in the upper montane forest regions in the States of Rio Grande do Sul and Santa Catarina, between 600 and 1400 m.

Isoetes naipiana (Isoetaceae), a new species from southern Brazil

Abstract Windisch P. G., Lorscheitter M. L. & Nervo M. H.: Isoetes naipiana (Isoetaceae), a new species from southern Brazil. — Willdenowia 44: 393–398. 2014. — Version of record first published online on 10 November 2014 ahead of inclusion in December 2014 issue; ISSN 1868-6397;

FLORADA RESERVA DUCKE, AMAZONAS, BRASIL: PTERIDOPHYTA -LYCOPODIACEAE

Øllgaard, B. 1994. Lycopodiaceae. In R. M. Tryon & R. G. Stolze. Pteridophyta of Peru. Part VI. 22. Marsileaceae28. Isoetaceae. Fieldiana, Bot., n.s. 34: 16-66. Øllgaard, B. 1995. Lycopodiaceae. Pp. 5-22. In R. C. Moran & R. Riba (eds.), Flora Mesoamericana 1. Psilotaceae a Salviniaceae. Universidad Nacional Autónoma de México, Ciudad de México. Øllgaard, B. & Windisch, P. G. 1987. Sinopse das Licopodiáceas do Brasil. Bradea 5: 1-43.