Pentagramma triangularis subsp. triangularis

The most widespread subspecies of Pentagramma triangularis, found throughout California and northward to British Columbia.

Plant habit on the trail to Feather Falls, west slope of the northern Sierra Nevada in Butte County, California, 27 May 2009.

Adaxial view of a leaf on the trail to Feather Falls, 27 May 2009.

Abaxial view of pinnae, showing sporangia scattered across the leaf surface, on the trail to Feather Falls, 27 May 2009.