Harrington's Cephalotaxus, Japanese Plum Yew Cephalotaxus harringtonia

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Botanical Name:

Cephalotaxus harringtonia







Common Name:

Harrington's Cephalotaxus, Japanese Plum Yew

Seeds Per Pound:
0.13 lb
Average Viable Seeds/Packet:
Germination Test Type:
Collection Locale:
Crop Year:
Minimum Hardiness Zone:
Harvest hemisphere:
In Stock: 0.13 lb
  • Cephalotaxus harringtonia

Items are priced on a curve, you can buy any 'bulk quantity' up to what we have in stock, some examples are:
1 packet (~ 10 seeds)
1 oz (~ 67 seeds)
Growing Info, follow in order:
Scarification: Soak in water, let stand in water for 24 hours.
Stratification: warm stratify for 120 days, cold stratify for 60 days.
Germination: sow seed 1/4 deep, keep moist.
Other: Germination may be irregular and some seed may lie over 2 years before germination.
Physical Characteristics : An evergreen Shrub growing to 5 m (16ft) by 3 m (9ft) at a slow rate. It is hardy to zone 7 and is not frost tender. It is in leaf 12-Jan It is in flower from Apr to May, and the seeds ripen from Oct to November. The flowers are dioecious (individual flowers are either male or female, but only one sex is to be found on any one plant so both male and female plants must be grown if seed is required) and are pollinated by Wind.The plant is not self-fertile. The plant prefers light (sandy), medium (loamy) and heavy (clay) soils.The plant prefers acid, neutral and basic (alkaline) soils..It can grow in full shade (deep woodland) or semi-shade (light woodland).It requires moist soil.
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New shoots of C. harringtonia remain green for three years after forming and have ribs at the leaf bases. The buds are green in colour, globular in shape and very small at only 1 mm in length. There is one rank of leaves present on either side of the shoot, and these rise up above it and curve slightly inwards, forming a narrow V-shape somewhat akin to a dove 's wings. The ranks are often vertical, but can be more flattened in shaded parts. The leaves are broadly linear in shape and measure about 5 cm long by 0.3 cm wide. They are abruptly pointed at the apex, leathery in texture and a bright matte yellowish-green on the upper-surface. The abaxial surface, or underside of the leaves, shows two broad, pale to silvery stomatal bands. Coloured plate from the book Flora Japonica , by Philipp Franz von Siebold and Joseph Gerhard Zuccarini The species is diecious and the male plants are typically densely covered with pairs of flowers that are pale cream in colour, though they become brown with time, and globular in shape. They are borne on 2 to 4 mm stalks beneath each pair of leaves. Pollen is released from March until May. The female individuals have two pairs of knob-like globose flowers that appear on curved stalks at the bases of the shoots. The fruit is obovoid in shape and measures 2.5 cm long by 1.5 cm wide. They are a smooth and pale green ín colour with dark green stipes, though when ripe they turn brown. An Australian company, ChemGenex Pharmaceuticals Ltd., is developing a leukemia therapy called Omacetaxine derived from the leaves of this yew species.

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