(Upload on May 16 2026) [ 日本語 | English ]
Cyathea mertensiana (Kunze) Copel.
Mount Usu / Sarobetsu post-mined peatland
From left: Crater basin in 1986 and 2006. Cottongrass / Daylily
HOME > Plant list (植物リスト) > Fern (シダ類) > Cyatheaceae (ヘゴ科) > Cyathea mertensiana
Cyatheaceae Kaulf. (ヘゴ)
|
Tall, usually unbranched arborescent stems covered in adventitious roots, very large pinnate to multipinnate fronds forming a crown, persistent or scarred stipe bases, scales and hairs on fronds, and round sori with or without indusia on the backs of veins |
Formerly one genus, Cyathea Hassler (2024): based on genetical phylogeny:
Alsophila R. Br. (ヘゴ) |
Cyathea J. E. Smith (ヘゴ)
|
Fossil: back to the Jurassic and Cretaceous periods reported from: New Zealand, South America and Europe C. aramaganensis Kaneh. (エダウチムニンヘゴ)C. hancockii Copel. (クサマルハチ) |
C. lepifera (J. Sm.) Copel. (ヒカゲヘゴ) C. loheri Christ (アヤヘゴ) C. lunulata (R. Br.) Copel. (ナンヨウヘゴ) C. mertensiana (Kunze) Copel. (マルハチ) C. metteniana (Hance) C. Chr. et Tardieu (チャボヘゴ) |
C. nigricans Mett. (カロリンクロヘゴ) C. ogurae (Hayata) Domin (メヘゴ) C. podophylla (Hook.) Copel. (クロヘゴ) C. spinulosa Wall. ex Hook. (ヘゴ) |
Cyathea mertensiana grown in Japan
Cyathea J. E. Smith (ヘゴ)Maruhachihego (マルハチヘゴ, 丸八桫欏/杪欏), MaruhachiLifeform: tall, evergreen fern, with 5-12 m in height Distribution: endemic to Bonin Islands Habitat: mesic forests, streamsides, etc. |
Synonyms:
Alsophila mertensiana Kunze
Sphaeropteris mertensiana (Kunze) R. Tryon, recently used if APP is applied |
|
1
2
3
[1-3] in Fukuoka Zoo and Botanical Garden, northern Kyushu, on September 20 2025.