Key to the Grape Ferns
(Botrýchium)
Plant large, fruiting in June, sterile part much divided:
Rattlesnake Fern.
Plant smaller:
Fruiting in autumn, sterile part long-stalked, triangular.
Common Grape Fern.
Fruiting in summer:
Plant fleshy, sterile part mostly with lunate segments.
Moonwort.
Plant less fleshy, segments not lunate:
Sterile part short-stalked above the middle of the stem.
Matricary Fern.
Sterile part stalked usually below middle of stem.
Little Grape Fern.
Sterile part sessile near the top of the stem.
Lance-leaved Grape Fern.