What is "sadleria"

Sadleria is a genus of six species of ferns in the family Blechnaceae, all endemic to Hawaii.

• Sadleria cyatheoides Kaulf. (amaumau fern or rasp fern)
• Sadleria pallida Hook. & Arn.
• Sadleria souleyetiana (Gaud.) T.Moore
• Sadleria squarrosa (Gaud.) T.Moore
• Sadleria unisora (Bak.) Rob.
• Sadleria wagneriana D.D.Palmer & Flynn

The Halemaumau crater on Kīlauea is named after S. cyatheoides.