Sadleria cyatheoides

Sadleria cyatheoides, commonly known as amaumau fern[3] or ʻamaʻu, is a fern species in the family Blechnaceae, in the eupolypods II clade[4] of the order Polypodiales,[5] in the class Polypodiopsida.[6] 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). Reaching a height of 0.9–1.5 m (3.0–4.9 ft) and a trunk diameter of 7.5–10 cm (3.0–3.9 in), ʻamaʻu resembles a small tree fern. Kīlauea's Halemaʻumaʻu is named for this species.[7]

Sadleria cyatheoides

Vulnerable  (NatureServe)
Scientific classification
Kingdom: Plantae
Clade: Tracheophytes
Class: Polypodiopsida
Order: Polypodiales
Suborder: Aspleniineae
Family: Blechnaceae
Genus: Sadleria
Species:
S. cyatheoides
Binomial name
Sadleria cyatheoides
Synonyms[2]
  • Blechnum fontanesianum Gaudich.
  • Blechnum kaulfussianum Gaudich.
  • Blechnum cyatheoides (Kaulf.) Christenh.
  • Woodwardia cyatheoides (Kaulf.) Mett.

Description

The young fronds are often tinged red to block harmful rays from the sun.[8]

References
  1. "Sadleria cyatheoides". Germplasm Resources Information Network (GRIN). Agricultural Research Service (ARS), United States Department of Agriculture (USDA). Retrieved 2011-06-14.
  2. Hassler, Michael & Schmitt, Bernd (November 2019). "Sadleria cyatheoides". Checklist of Ferns and Lycophytes of the World. 8.11. Retrieved 2019-12-24.
  3. "Sadleria cyatheoides". Natural Resources Conservation Service PLANTS Database. USDA. Retrieved 26 October 2015.
  4. Carl J. Rothfels; Anders Larsson; Li-Yaung Kuo; Petra Korall; Wen- Liang Chiou; Kathleen M. Pryer (2012). "Overcoming Deep Roots, Fast Rates, and Short Internodes to Resolve the Ancient Rapid Radiation of Eupolypod II Ferns". Systematic Biology. 61 (1): 70. doi:10.1093/sysbio/sys001. PMID 22223449.
  5. Maarten J. M. Christenhusz; Xian-Chun Zhang & Harald Schneider (2011). "A linear sequence of extant families and genera of lycophytes and ferns" (PDF). Phytotaxa. 19: 7–54.
  6. Alan R. Smith; Kathleen M. Pryer; Eric Schuettpelz; Petra Korall; Harald Schneider & Paul G. Wolf (2006). "A classification for extant ferns" (PDF). Taxon. 55 (3): 705–731. doi:10.2307/25065646.
  7. 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.
  8. Read on a sign in Hawaii Volcanoes National Park on 31.10.2013
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