Pentagramma is a small genus of North American ferns. Until 1990 members of this genus were included in Pityrogramma, and there has been considerable disagreement regarding the species' taxonomy.[1] In the most recent treatment, six diploid species are recognized.[2]
The distribution of P. triangularis (goldback fern) extends from British Columbia through the western United States into Baja California in northwestern Mexico.[3] Pentagramma maxonii occurs in New Mexico, Arizona, Sonora, Baja California Sur, California, and Baja California. All other species are restricted to Californian and Baja California.
Members of the Pentagramma genus produce a powdery-waxy secretion on their lower leaf surfaces, called farina. This character is shared with the related Notholaena genus.
As of December 2021, the Checklist of Ferns and Lycophytes of the World recognized the following species:[4]
Pentagramma is a small genus of North American ferns. Until 1990 members of this genus were included in Pityrogramma, and there has been considerable disagreement regarding the species' taxonomy. In the most recent treatment, six diploid species are recognized.
The distribution of P. triangularis (goldback fern) extends from British Columbia through the western United States into Baja California in northwestern Mexico. Pentagramma maxonii occurs in New Mexico, Arizona, Sonora, Baja California Sur, California, and Baja California. All other species are restricted to Californian and Baja California.
Members of the Pentagramma genus produce a powdery-waxy secretion on their lower leaf surfaces, called farina. This character is shared with the related Notholaena genus.
Pentagramma es un género con 2 especies de helechos perteneciente a la familia Pteridaceae.
Pentagramma fue descrito por Yatsk., Windham & E.Wollenw. y publicado en American Fern Journal 80(1): 9–17. 1990.[1] La especie tipo es: Pentagramma triangularis (Kaulf.) Yatsk., Windham & E. Wollenw.
A continuación se brinda un listado de las especies del género Pentagramma aceptadas hasta abril de 2012, ordenadas alfabéticamente. Para cada una se indica el nombre binomial seguido del autor, abreviado según las convenciones y usos.[2]
Pentagramma es un género con 2 especies de helechos perteneciente a la familia Pteridaceae.
