SAHASHI, NORIO. Department of Biology, School of Pharmaceutical Sciences, Toho university, Funabashi, Chiba 274-8510, Japan. - A New Combination of the Ophioglossaceae Using Palynological and Morphological Studies on the Old World.
Phylogenetic relationships among the genera of the Ophioglossaceae
sensu lato are controversial from the viewpoints of morphological and
anatomical features. However, I demonstrated mainly from the spore
morphological studies of the Ophioglossaceae on the Old World. I
concluded that the Botrychiaceae (includes Botrychium s.lat.
and Helminthostachys) is composed of five genera,
Botrychium (divided into 2 sections), Sceptridium
(divided into 2 sections), Botrypus (divided into 2 sections),
Japanobotryhium and Helminthostachys. Moreover,
Ophioglossaceae sensu strict consists of two genera,
Ophioglossum and Ophioderma. A key to the genus
according to spore morphology is as follows; Spores subtriangular, or
often rounded triangular in polar view, with almost projective basic
ornamentations:Botrychiaceae. Spores tuberculate to verrucate, or
often extervermiculate:Botrychium. Spores rugulo-reticulate
with fine granules, or beset with irregularly fine
projections:Sceptridium. Spores convolute or often uniting to
form reticulate with finely striate:Japanobotrychium. Spores
coarsely and largely verrucate with fine granules:Botrypus.
Spores reticulum-like pattern, thin ridges decorated with delicate
projections:Helminthostachys. Spores rounded triangular or
globose in shape, with mostly depressed basic
ornamentations:Ophioglossaceae. Spores usually globose, foveolate to
foveo-reticulate, or often reticulum-like pattern:Ophioglossum.
Spores large and rounded triangular in polar view, usually foveolate
to reticulum-like pattern:Ophiodedrma.
Key words: Botrychiaceae, Ophioglossaceae, Ornamentation, spore morphology