Podocarpium podocarpum japonicum

Family: Fabaceae or Leguminosae

What it is like

Podocarpium podocarpum japonicum is a PERENNIAL growing to 1.2 m (4ft). It is in flower from August to September, and the seeds ripen from September to November. The species is hermaphrodite (has both male and female organs) and is pollinated by Insects. It can fix Nitrogen. Suitable for: light (sandy), medium (loamy) and heavy (clay) soils and prefers well-drained soil. Suitable pH: mildly acid, neutral and basic (mildly alkaline) soils. It cannot grow in the shade. It prefers moist soil.

Height (m): 1.2

Where it is found

Woods and thickets throughout Japan. Oak groves and shrubby thickets, gravelly soils of mountain slopes.

E. Asia - China, Japan, Korea, Himalayas.

Conservation Status:

Countries/locations it is found in

How it is used

Food

Rating: 2

Seed - cooked. Ground into a powder or steamed.

Seed: includes nuts, cereals, peas and beans.

Medicine

Rating: 1

A tincture of the plant is a respiratory stimulant. A decoction of the plant is diaphoretic.

Diaphoretic: Induces perspiration.

Stimulant: Excites or quickens activity of the physiological processes. Faster acting than a tonic but differing from a narcotic in that it does not give a false sense of well-being.

Other

Rating:

Nitrogen Fixer: Plants that fix nitrogen in the soil

How it is grown

We have very little information on this species and do not know if it will be hardy in Britain, though judging by its native range it should succeed outdoors in many parts of this country. The following notes are based on the general needs of the genus. Requires a well-drained soil and a sunny sheltered position. This species has a symbiotic relationship with certain soil bacteria, these bacteria form nodules on the roots and fix atmospheric nitrogen. Some of this nitrogen is utilized by the growing plant but some can also be used by other plants growing nearby.

Propagating it: Seed - best sown as soon as it is ripe in a greenhouse. Scarify and pre-soak stored seed for 5 hours in warm water then sow March in a greenhouse. The seed usually germinates within 1 - 4 months at 25°c. Prick out the seedlings into individual pots once they are large enough to handle and grow them on in the greenhouse for their first winter. Plant them out in late spring or early summer and consider giving them some protection from frost in their first winter outdoors. Cuttings of half-ripe wood with a heel, July/August in a frame. Division as the plant comes into growth in the spring. Larger clumps can be replanted direct into their permanent positions, though it is best to pot up smaller clumps and grow them on in a cold frame until they are rooting well. Plant them out in the spring. Root cuttings in winter.

Best place to grow: Woodland Garden Sunny Edge;

Habit: Perennial

Hardiness:

Growth:

Soil: Light (sandy), medium, heavy (clay)

Shade: No shade

Moisture: Moist

Things to keep in mind

Its other names

Local names

Synonyms

D. japonicum. Miq. pro parte. D. racemosum. (Thunb.)DC. D. thunbergii. pro parte. Hedysarum racemosum. Non Aubl.