Top
Header

(First upload on May 11 2010. Last on July 31 2021) [ 日本語 | English ]

Cephalotaxus harringtonia (Knight ex Forbes) K. Koch






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

Cephalotaxus Siebold et Zucc. ex Endl. (イヌガヤ)
Inugaya (イヌガヤ, 犬榧), Japanese plum yew
Distribution: endemic to eastern Asia
Habitat: deciduous-forest floor
C. harringtonia (Knight) K. Koch (イヌガヤ, s.l.)
Lifeform: evergreen needle-leaved tree
var. drupacea (Sieb. et Zucc. ex Miq.) Koidz. (イヌガヤ, s.s.)
Stem: tree ≈ 6-10 m in height
Distribution: northern China - Korea - Japan (not in Hokkaido)
var. nana (Nakai) Rehder
Hai-inugaya (ハイイヌガヤ, 這犬榧), dwarf Japanese plum yew
Distribution: Mainly in Japan Sea side (Honshu - Shikoku) - western Hokkaido
Stem: shrub < 2 m high
Leaf: slimmer and shorter than var. drupacea
f. fastigiata (Carr.) Rehd. (チョウセンマキ)
Leaf: spiral arrangement
Use: a cultivar for gardening
索引

[Engler's syllabus (エングラー体系)]

Cephalotaxaceae Neger in Japan


Etymology: cephalo (head) + taxus (yew)
Three genera:
Amentotaxus Pilg.
Cephalotaxus Siebold et Zucc. ex Endl., one species in Japan (C. harringtonia)
Torreya Arn.
One species in one genus (Cephalotaxus) is distributed in Japan

Cephalotaxus harringtonia in Japan


var. drupacea (イヌガヤ, s.s.)

ST1 ST2 ST3
[1/2] on Seyama trail in Kobe, western Japan, on March 16 2019. [3] at a house garden in N27/E2, East Ward, Sapporo, on March 31 2021.

var. nana (ハイイヌガヤ)

ST1 ST2 ST3
ST4 ST5 ST6
ST7
[1-3] on the north slope of Mount Sankaku, Sapporo City, on April 17 2010 (☛ Mount Moiwa, 藻岩山). [4/5] cones in a small forest near GSEES, HU, on May 21 2013. [6] male flowers (winter buds) at a hedge in Sapporo on February 20 2020. [7] along Katsura Course in Nopporo Forest Park on July 17 2021.

フッター