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A community‐derived classification for extant lycophytes and ferns
A modern, comprehensive classification for lycophytes and ferns, down to the genus level, utilizing a community‐based approach, that uses monophyly as the primary criterion for the recognition of taxa, but also aims to preserve existing taxa and circumscriptions that are both widely accepted and consistent with the understanding of pteridophyte phylogeny.
Phylogenetic studies of Ophioglossaceae: evidence from rbcL and trnL-F plastid DNA sequences and morphology.
Isozyme variability among cryptic species of Botrychium subgenus Botrychium (Ophioglossaceae).
All available molecular data indicate that members of Botrychium subgenus Botychium are actively evolving at diploid and polyploid levels, and realignment of the sectional assignment of several species is proposed.
A Molecular Assessment of Relationships Among Cryptic Species of Botrychium Subgenus Botrychium (Ophioglossaceae)
- W. Hauk
- 1 October 1995
Phylogenetic relationships among 20 currently recognized species of Botrychium sub- genus Botrychium were investigated using nucleotide sequences from the plastid gene rbcL. Anal- ysis of eight…
Amplification of noncoding chloroplast DNA for phylogenetic studies in lycophytes and monilophytes with a comparative example of relative phylogenetic utility from Ophioglossaceae.
A Phylogenetic Investigation of Botrychium s. s. (Ophioglossaceae): Evidence from Three Plastid DNA Sequence Datasets
Individual and combined maximum parsimony and a combined maximum likelihood analysis showed strong support for the monophyly of Botrychium s.
An Evaluation of Sceptridium dissectum (Ophioglossaceae) with ISSR Markers: Implications for Sceptridium Systematics
ISSR markers revealed levels of population genetic structure in S. dissectum similar to levels detected by previous isozyme investigations, and may bring into question current species circumscriptions in Sceptridium.
Four new species of Memora (Bignoniaceae) from South America
- W. Hauk
- 21 January 1999
Four new South American species of Memora (M. cidii, M. sastrei, and M. velutina) are described and three are illustrated and Relationships of these species to other Memora species are discussed.
Ionic conduction of pure and doped CaF2 and SrF2 crystals
The ionic conductivity of pure as well as NaF- and YF3-doped CaF2 and SrF2 crystals was investigated between room temperature and 900°C. The absorption of the crystals was measured before and after…