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Morus australis

Basic information
Scientific name Morus australis

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ヤマグワ
Common names Aino mulberry
Higher taxon Moraceae, Urticales, Magnoliopsida, Magnoliophyta
Natural range Japan (lower montane region in main islands), Sakhalin, China, Indochina, India, Himalaya.
Habitat Humid forest
Invasion information
Range in Japan Ogasawara (Bonin) Islands. (Chichijima and Hahajima Is.) Range in Japan
Origin Ryukyus and Hachijojima Island, Izu Islands
Date 1890s and 1920s
Route Deliberate: For culture of silkworm
Impact Actually: Hybridization with native mulberry M. boninensis. On Chichijima and Hahajima Is., only few mother trees of the native mulberry exist, and most offspring may be hybrid.
Affected organism: Native congener M. boninensis (hybridization)
Regulation in Japan Import of the fruits of Morus from the regions with Ceratitis capitata and those with Bactrocera tryoni is prohibited by the Plant Protection Law.
Introduced range in other countries
Reference Notes
  • Kawahara & Yoshimaru (2002) Morus boninensis. Shinrin-Kagaku. 34, 14-18 (in Jpn)
  • Kawakami & Okochi (eds) (2009) Restoring the Oceanic Island Ecosystem. Impact and Management of Invasive Alien Species in the Bonin Islands. Springer, Tokyo, Berlin, Heidelberg, and New York.
  • Satake et al. (1989) Wild Flowers of Japan, Woody Plants [I]. Heibonsha, Tokyo (in Jpn)
  • Tomiyama (1999) Disturbance of island ecosystem by introduced species in Ogasawara Islands. Jpn J Ecol. 48, 63-72 (in Jpn)
  • Toyoda (ed.) (2003) Flora of Bonin Islands (Enlarged & Revised). Aboc, Kamakura (in Jpn)
  • etc.
Currently, this species is not used for silkworm culture.

Although the invasive mulberry on Ogasawara is usually identified as M. australis in recent literature, an author pointed out that some invasive mulberries on Ogasawara seem to be M. kagayamae, the native mulberry on Hachijojima, one of the putative sources of the invasive mulberry.