Lygodium

About: Lygodium is a research topic. Over the lifetime, 89 publications have been published within this topic receiving 1408 citations. The topic is also known as: Hagnaya.

Floristica e aspectos ecologicos da pteridoflora em tres segmentos florestais ao longo do rio Pindaiba, Mato Grosso

Abstract: Floristic and ecological aspects of the pteridoflora in three forest segments along Pindaiba River, Mato Grosso. The richness of pteridophytes in three forest segments along Pindaiba River: the first segment near the river’s source (municipality of Barra do Garcas), a second in the central region (Araguaiana) and one near the mouth (Nova Xavantina). A total of 26 species representing 13 genera and ten families, was found. The first and the last segments presented the biggest species richness (12 species). Pteridaceae presented the largest representation (seven species, 26,9%), while the smallest was wound in the Dryopteridaceae, Hymenophyllaceae, Psilotaceae and Selaginellaceae (one specie each). Larger generic diversity was observed in the Polypodiaceae (Microgramma and Polypodium), Pteridaceae (Adiantum and Pityrogramma) and Schizaeaceae (Anemia and Lygodium). The largest number of species was found in Adiantum, (six species: A. deflectens, A. humile, A. intermedium, A. latifolium, A. petiolatum and A. serratodentat um). Information related to the ecological aspects (habit, life forms and substrate preference) of the species is presented. The need for greater preservation of the forested areas along the rivers in order to conserve the fern flora is quite evident.

A Chromosome Count in Schizaea

Abstract: THE Schizaeaceae are a very ancient family of ferns, with only four very distinct genera still living. In view of their great antiquity, the cytology of these plants is of considerable interest for fern phylogeny. Manton1 has recorded chromosome numbers in two of the four genera, namely, n = 38 and 76 in Anemia, and n = 29 and 30 in Lygodium. No information is available for Mohria, nor, until now, for Schizaea. The extreme difficulty of maintaining any of the known species of Schizaea in cultivation is no doubt a principal reason for this omission.

Laboratory host range of Austromusotima camptozonale (Lepidoptera: Crambidae), a potential biological control agent of Old World climbing fern, Lygodium microphyllum (Lygodiaceae)

Abstract: Old World climbing fern, Lygodium microphyllum, is one of the most serious invasive weeds impacting south Florida and development of biological control is crucial for sustainable management. Larvae of a small moth, Austromusotima camptozonale, were discovered defoliating L. microphyllum in Australia. Preliminary testing suggested this moth was a Lygodium specialist. Laboratory host range testing was conducted on 65 species of test plants, from 31 families, comprising seven Lygodium species, four close relatives, 45 other species of ferns and fern allies, eight agricultural crops and one gymnosperm species plus the primary host L. microphyllum. Significant oviposition occurred only on other species of Lygodium. No eggs were laid on the agricultural crops, or about half the species of non-Lygodium ferns and fern allies tested. Oviposition on the other non-Lygodium ferns was very low, except on Anemia adiantifolia and Blechnum serrulatum, which received modest egg loads, but did not support developm...

A taxonomical revision of Lygodium (Filicinae) in America

Abstract: This work summarizes the taxonomical status of the American species of the fern genus Lygodium. Each species is described under a given set of characters. The information content of the character-states was performed and some implications of these measurements are discussed. Besides a dichotomic identification key for species, synonymy, and its distribution on each country are given. It is recognized 8 taxa at the specific level and 47 taxa (16 infraspecific) are be regarded as synonyms. In dieser Arbeit wird der taxonomische Status der amerikanischen Arten der Farn-Gattung Lygodium zusammengefast. Jede Art wird an Hand einer gegebenen Anzahl von Merkmalen beschrieben. Der Inhalt der Information dieser Merkmalswerte wird ausgewertet und einige Ergebnisse dieser Messungen werden beschrieben. Auserdem wird ein zweiteiliger Schlussel fur die Identifizierung der Arten, Synonyme und ihrer geographischen Verbreitung festgelegt. Es werden 8 Taxa mit spezifischem Niveau anerkannt und 47 (16 mit infraspezifischem Niveau) werden als Synonyme angesehen.