(First upload on October 25 2008. Last on July 5 2019) [ 日本語 | English ]

Taxus cuspidata Sieb. et Zucc.

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

Taxopsida (Taxales)


[New Engler's syllabus (新エングラー体系)]

Taxaceae S. F. Gray, yew

Class Coniferopsida 球果植物綱(針葉樹綱), or Taxopsida

microsporophyll → shield-shaped with 6-8 microsporangia

Fifteen species in five (to seven) genera, mainly distributed in the Northern Hemisphere
Taxus L. (イチイ)
Arillus (pl. aril) (仮種皮) → red and juicy flesh like a pot
Eight or nine species (or one species with eight or nine varieties
T. baccata, European yew
T. brevifolia, Pacific yew, western yew
T. canadensis, Canadian yew
T. chinensis, Chinese yew
T. cuspidata, Japanese yew
T. floridana, Florida yew
T. globosa, Mexican yew
T. sumatrana, Sumatran yew
T. wallichiana, Himalayan yew
Fig. A phylogeny tree.

Taxus cuspidata in Hokkaido

Ichii (イチイ, 一位), Japanese yew
also we call Onko (オンコ) in Hokkaido
Araragi (アララギ)
Lifeform: dioecious, evergreen shrub/tree (giant tree)
Distribution: Japan - Korea - northeast China - southeast Russia
Habitat: mainly in mountainous regions

Field training on integrated environmental research (統合環境調査法実習) (fauna and flora 種リスト)

HUSTEP: Plants and Plant communities in Japan (flora list)

Seed dispersal: endo-zoochore (animal)
var. nana Hort. ex Rehder
Kyaraboku (キャラボク, 伽羅木)
Distribution: the Japan Sea side of Honshu
Stem: dwarf form branching at the base
Leaf: spiral arrangement

cv. Aurescens (オウゴンキャラ)

f. luteobaccata (Miyabe et Tatew.) Hayashi (キミノオンコ)

[1] in Hokkaido University Campus (N11/W5) on October 19 2008. [2] in a Hokko Green Space, East Ward, Sapporo, on September 1 2018. [3] in the Arboretum of Faculty of Agriculture, Hokkaido University, close to the Poplar Street on September 27 2016. [4] in front of the Faculty of Engineer, Hokkaido University. [5] a giant tree in northern Hokkaido (高橋峠のイチイ) on June 25 2018.

var. nana

[1] in the arboretum (樹木園) of Kyushu University Experimental Forest in Ashoro Town, eastern Hokkaido, on June 5 2014. [2/3] in Botanic Gardens, Tohoku University, Natural Monument Aobayama, northern Honshu, on March 23 2016. Record: in the backyard of Arctic Research Center, Hokkaido University, on June 4 2018