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Glume Absence In The Orcuttieae (Gramineae: Chloridoideae) And A Hypothisis Of Intratribal Relationships, Eric H. Roalson
Glume Absence In The Orcuttieae (Gramineae: Chloridoideae) And A Hypothisis Of Intratribal Relationships, Eric H. Roalson
Aliso: A Journal of Systematic and Floristic Botany
This study addresses glume absence in tribe Orcuttieae. In Orcuttia califomica, O. inaequalis, and O. viscida, all spikelets possess two glumes except for the terminal spikelet of the inflorescence, which lacks both glumes. In O. pilosa and Tuctoria greenei the terminal spikelet lacks only the first (proximal) glume, whereas in O. tenuis, T. fragilis, and T. mucronata both glumes are developed on all spikelets. This is the first report of glume absence in species of Orcuttieae other than Neostapfia colusana, which has been long reported to lack both glumes on all spikelets. A hypothesis …
Potential Utility Of Chloroplast Trnl (Uaa) Gene Intron Sequences For Inferring Phylogeny In Scrophulariaceae, C. Edward Freeman, Ron Scogin
Potential Utility Of Chloroplast Trnl (Uaa) Gene Intron Sequences For Inferring Phylogeny In Scrophulariaceae, C. Edward Freeman, Ron Scogin
Aliso: A Journal of Systematic and Floristic Botany
Whereas chloroplast DNA-derived sequence data from protein coding regions have been utilized successfully at many taxonomic levels in recent years, sequences which are variable enough to allow for efficient phylogenetic inference (maximum information with relatively low sequencing costs and effort) at the subfamilial level huve been few. Sequence data were obtained in this study from a noncoding region, the trnL (UAA) gene intron, from a selection of taxa from the Scrophulariaceae and closely related families (representing 41 species in 26 genera). Groups of species from commonly recognized tribes and subtribes were included to determine if these taxa were grouped together …