[THE BRACKEN GROUP]
Sporangia near or on the margin of the segments, the reflexed portions of which serve as indusia.
[1. BRACKEN OR BRAKE]
Ptèris aquilina. PTERÍDIUM LATIÚSCULUM[1]
[Footnote 1: The use of small capitals in the scientific names indicates in part the newer nomenclature which many botanists are inclined to adopt.]
Fronds broadly triangular, ternate, one to three feet high or more, the widely spreading branches twice pinnate, the lower pinnules more or less pinnátifid. Sporangia borne in a continuous line along the lower margin of the ultimate divisions whose reflexed edges form the indusium. (Greek, pteron, a wing, the feathery fronds suggesting the wings of a bird.)
Common Bracken or Brake, a Sterile Frond. Pteris aquilina (Providence County, R.I.)
A Fertile Frond of Common Bracken. Pteris aquilina (Suffolk County, Mass.)