ABSTRACT Three species of Platygramme in North America (north of Mexico) are treated, two of which are newly reported for the continent (P. pachnodes and P. praestans). The new combination Platygramme pachnodes is proposed for Phaeographina pachnodes (basionym Graphis pachnodes).
ABSTRACT It is commonly believed that only a single species of Phragmites (Gramineae) occurs in North America. Here, field observation shows greater morphological differences than previously recognized between an introduced East Coast population and a native Gulf Coast population, and are sufficient to justify specific rank for each. These differences are discussed and illustrated, and a key is provided for separation. The introduced population, and the widespread northern native population (not studied), are treated as P. australis, and the Gulf Coast population as P. karka. Nomenclatural uncertainties are noted.
Beerling, David. 2007. The Emerald Planet: How Plants Changed Earth’s History. Oxford University Press, Oxford, United Kingdom. 304 p. $30.00. ISBN 0192806025.