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(First upload on January 29 2014. Last on June 27 2016) [ 日本語 | English ]

Torreya nucifera (L.) Siebold et Zucc.






Mount Usu / Sarobetsu post-mined peatland
From left: Crater basin in 1986 and 2006. Cottongrass / Daylily

Ohwi & Kitagawa (1983) classified Torreya into Taxaceae ⇒ Engler's syllabus (エングラー体系)
Torreya Arn. in Japan
T. nucifera (L.) Siebold et Zucc., one species in this genus
Kaya (カヤ, 榧), Japanese nutmeg-yew
Life form: evergreen needle-leaved tree ≈ 20 m high
Distribution: Korea - Japan (south to Tohoku District)
Habitat: a component of temperate forest
Leaf: sharp top
Seed: utilized for food and medicine
Use: go board (The Anthology of Myriad Leaves, 万葉集)
Synonyms:

Taxus nucifera L.

var. radicans Nakai (チャボガヤ), Syn. Torreya ascendens Nakai ex Uyeki, < 3 m high, Shikoku - Honshu
var. igaensis (Doi et Morikawa) Ohwi (コツブガヤ), Torreya igaensis Doi et Morikawa, lead = 1-1.8 cm long, Honshu (rare)
var. macrosperma (Miyoshi) Koidz. (ヒダリマキガヤ), Syn. Torreya macrosperma Miyoshi, seed = oblong with 30-40 mm, Honshu (rare)
f. nuda (Miyoshi) Kusaka (ハダカガヤ), Syn. var. nuda (Miyoshi) Makino
f. sphaerica (Kimura) Yonek. (マルミガヤ)
索引

Torreya nucifera in Japan


ST1 ST2 ST3
[1/2] on Fukuura-jima Island in Matsushima Islands, northern Honshu, on March 21 2016. [3] at a trail to go Yakuo-in Shrine on Mount Takao (599 m elevation), Tokyo, on October 21 2013 → Mount Takao forest for recreational use (高尾山自然休養林)

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