Sadleria cyatheoides

Sadleria cyatheoides
Conservation status
	; Vulnerable (NatureServe)
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Division:	Polypodiophyta
Class:	Polypodiopsida
Order:	Polypodiales
Suborder:	Aspleniineae
Family:	Blechnaceae
Genus:	Sadleria
Species:	S. cyatheoides
Binomial name
	Sadleria cyatheoides; Kaulf.
Synonyms
	Blechnum fontanesianum Gaudich. ; Blechnum kaulfussianum Gaudich. ; Blechnum cyatheoides (Kaulf.) Christenh. ; Woodwardia cyatheoides (Kaulf.) Mett. ;

Sadleria cyatheoides, commonly known as ʻamaʻumaʻu fern^[3] or ʻamaʻu,^[4] is a fern species in the family Blechnaceae.

Description

Reaching a height of 0.9–1.5 m (3–5 ft) and a trunk diameter of 7.5–10 cm (3–4 in), ʻamaʻu resembles a small tree fern.

The young fronds are often tinged red to block harmful sunlight.^[5]

It is endemic to Hawaii and inhabits lava flows, open areas, and wet forests on all major islands up to an altitude of 1,676 m (5,499 ft).

Its pith and young fronds are edible either roasted or steamed.^[4]

Kīlauea's Halemaʻumaʻu is named for this species.^[6]

^ "Sadleria cyatheoides". Germplasm Resources Information Network. Agricultural Research Service, United States Department of Agriculture. Retrieved 2011-06-14.
^ Hassler, Michael & Schmitt, Bernd (November 2019). "Sadleria cyatheoides". Checklist of Ferns and Lycophytes of the World. 8.11. Retrieved 2019-12-24.
^ NRCS. "Sadleria cyatheoides". PLANTS Database. United States Department of Agriculture (USDA). Retrieved 26 October 2015.
^ ^a ^b Chock, Alvin K. (1968). "Hawaiian Ethnobotanical Studies I. Native Food and Beverage Plants". Economic Botany. 22 (3): 221–238. Bibcode:1968EcBot..22..221C. doi:10.1007/BF02861956. ISSN 0013-0001. JSTOR 4252960.
^ Read on a sign in Hawaii Volcanoes National Park on 31.10.2013
^ Little Jr., Elbert L.; Roger G. Skolmen (1989). "ʻAmaʻu, sadleria" (PDF). Common Forest Trees of Hawaii (Native and Introduced). United States Forest Service. Retrieved 2011-06-14.