New Taxa and Nomenclatural Combinations of Mesoamerican Grasses (Poaceae)

Nomenclatural Changes for Some Grasses in California and the Muhlenbergia Clade (Poaceae)

New combinations and names are here validated for ten grass (Poaceae) taxa in California for the forthcoming revision of The Jepson Manual. In addition, guided by recent molecular phylogenetic studies, ten non-California grass species are here transferred to Muhlenbergia (Chloridoideae: Cynodonteae) to achieve monophyly of the genus. Lolium, long known to be phylogenetically nested within Festu...

Systematics of California Grasses (Poaceae)

The grass family (Poaceae or Gramineae) is the fourth largest flowering plant family in the world and contains about 11,000 species in 800 genera worldwide. Twenty-three genera contain 100 or more species or about half of all grass species, and almost half of the 800 genera are monotypic or diatypic, i.e., with only one or two species (Watson and Dallwitz 1992, 1999). Over the last 150 years th...

Early inflorescence development in the grasses (Poaceae)

The shoot apical meristem of grasses produces the primary branches of the inflorescence, controlling inflorescence architecture and hence seed production. Whereas leaves are produced in a distichous pattern, with the primordia separated from each other by an angle of 180°, inflorescence branches are produced in a spiral in most species. The morphology and developmental genetics of the shift in ...

Grasses (Poaceae) of Easter Island — Native and Introduced Species Diversity

Nomenclatural notes on Pseudocyphellaria V: Some Brazilian taxa*

A new, phyllidiate, white-medulla species with yellow pseudocyphellae and a green photobiont, Pseudocyphellaria kalbii D.J.Galloway, is described from Brazilian collections, and typification and notes on P. aurora (De Not.) Vainio are presented. According to the literature the lichen genus Pseudocyphellaria is represented in Brazil by three taxa; P. aurata, P. aurora and P. clathrata (De Notari...