EVERGREEN

Plant Encyclopedia

Cephalotaxus harringtonia var. harringtonia

Cephalotaxus harringtonia var. harringtonia ("Inugaya")

Japanese name: イヌガヤ (犬榧)
Scientific name: Cephalotaxus harringtonia var. harringtonia

Cephalotaxus harringtonia var. harringtonia

[Overview]
An evergreen coniferous small tree or shrub, reaching 8–10 m in height in large specimens.
The bark splits shallowly lengthwise.
The leaves are alternate, but because their bases are twisted they appear to be arranged in two horizontal rows.
The leaves are linear, about 3–5 cm long and 0.3 cm wide, with short pointed tips that do not hurt when touched.
The upper surface of the leaf is dark green, and the underside has white stomatal bands.
It is dioecious.
The male flowers are spherical and grow in the leaf axils of the previous year's branches.
The female flowers (ovules) are ovate and grow singly or in pairs in the leaf axils at the tips of the previous year's branches.
The seeds are elliptical, about 2.5 cm long, enclosed in an aril, and ripen in October of the following year.
The outer seed coat turns reddish purple when ripe.

[Uses]
Oil from the seeds was once used as lamp oil and as hair oil.
The wood is used for utensils and crafts.

[Cultivation]
Propagate by cuttings.
It dislikes being transplanted somewhat.
It prefers a sunny, well-drained, moderately moist, fertile site.
It is shade tolerant and can endure about partial shade.
For potted plants, and for plants in the ground less than 2 years after planting, water thoroughly when the soil surface dries; for established plants in the ground, rainfall is sufficient.
Apply organic fertilizer around the plant as fertilizer in winter.
There are no particular pests or diseases.

Details

Names
Japanese: イヌガヤ(犬榧)、ヒノキダマ、ヘダマ
Life form
Shrub, Small tree
Evergreen / deciduous
Evergreen
Leaf type
Needle-leaved
Habit
Terrestrial
Planting (or sowing) season
March, April, September, October
Flowering season
March, April
Fruiting season
October
Distribution or origin
Japan (Honshu: mainly Pacific side from Iwate southward, Shikoku, Kyushu: as far as Yakushima), Korea, northeastern China
Growth form
Upright, Branching
Height
8000–10000 mm
Leaf shape
Linear
Leaf arrangement
Alternate
Leaf color
Green
Availability of seeds and plants
Low
Form sold
Seedlings
Propagation
Cuttings
Sun exposure
Full sun, Partial shade
Water needs
Moderate
Soil needs
Required
Tolerance
Cold tolerance, Shade tolerance
Suitable uses
Parks and gardens
Hardiness zone
7a–10b
Japan Flower Trade Code
54243

Translated from our Japanese encyclopedia. If anything differs, the Japanese page is correct.

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