(First upload on July 28 2013. Last on January 3 2016) [ 日本語 | English ]

Pittosporum tobira (Thunb. ex Murray) W. T. Aiton

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

Pittosporum Banks ex Sol. (トベラ) in Japan

Pittosporaceae R. Br.

Lfieform: trees, shrubs, and lianas (in 9-10 genera)
Distribution: Tropical to temperate climates
There are about 200 shrub and tree species in this genus, distributed in Australasia, Oceania, and eastern Asia.

Not naturally distributed in Hokkaido
Probably Gondwanan (ゴンドワナ) in origin

Flowers developing five sepals and five petals.
Widley used for gardening, hedge, and ornamental
P. boninense Koidz. (シロトベラ)

var. chichijimense (Nakai ex Tuyama) H. Ohba (オオミノトベラ)

var. lutchuense (Koidz.) H. Ohba (オキナワトベラ)

P. daphniphylloides Hayata (ヤドリオオバトベラ)
P. illicioides Makino (コヤスノキ)
P. parvifolium Hayata (コバトベラ)

var. beecheyi (Tuyama) H. Ohba (ハハジマトベラ)

P. tenuifolium Sol. ex Gaertn. (クロバトベラ)
P. tobira (Thunb.) W. T. Aiton (トベラ)
P. undulatum Vent. (シマトベラ)
P. viburnifolium Hayata (オニトベラ)

Pittosporum tobira in Japan

Tobera (トベラ, 扉/海桐花), Japanese pittosporum, Japanese mock-orange or Japanese cheesewood

Japanese name: originating from tobira (扉, door) that becomes species epithet

Lifeform: dioecism, evergreen shrub < 3 m high (occasionally ≈ 10 m)
Distribution: southern China - Taiwan - Korea - Japan (south to Tohoku District)
Habitat: rocky seashore
var. calvescens Ohwi (タカサゴトベラ): Taiwan
f. macrophyllum (Nakai) Sugim. (オオバトベラ)
and many cultivars

[1-3] at West Ariake Pier Park, Tokyo, on May 12 2013.
[4-6] in Hama-rikyu Gardens, Tokyo, on November 13 2015.