Thuja standishii

Thuja standishii
Thuja standishii foliage and cones upper side left, under side right
Conservation status
Near Threatened  (IUCN 3.1)
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Gymnospermae
Division:	Pinophyta
Class:	Pinopsida
Order:	Cupressales
Family:	Cupressaceae
Genus:	Thuja
Species:	T. standishii
Binomial name
Thuja standishii (Gordon) Carr.

Thuja standishii (Japanese thuja; nezuko, kurobe) is a species of thuja, an evergreen coniferous tree in the cypress family Cupressaceae. It is native to southern Japan, where it occurs on the islands of Honshū and Shikoku. It is a medium-sized tree, reaching 20–35 m tall and with a trunk up to 1 m diameter.

The foliage forms in flat sprays with scale-like leaves 2–4 mm long, matte green above, and with narrow white stomatal bands below. The cones are oval, yellow-green ripening red-brown, 6–12 mm long and 4–5 mm broad (opening to 8 mm broad), with 6–10 overlapping scales.

It is an important timber tree in Japan, grown in forestry plantations for its durable, waterproof, attractively scented wood.

There is some evidence that extracts of Thuja standishii have biological activity. It contains a compound called Standishinal which has shown relatively potent effects on the Aromatase enzyme. It acts as an inhbitor, thus decreasing the synthesis of Estradiol in the human body. This compound has been used in research and derivatives of it have shown even stronger inhibition of Aromatase.

https://www.sciencedirect.com/science/article/pii/S0040403999011910

https://www.sciencedirect.com/science/article/pii/S0968089607000570

External links

• Gymnosperm Database - Thuja standishii