Styphnolobium japonicum
Scholar-tree or Japanese pagoda tree
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For those in the right zone this is an excellent tree. It has attractive creamy flowers which have the added benefit of producing a slight fragrance which is more pronounced when they carpet the ground. Additionally it provides excellent shade because of its thick canopy and lush foliage.
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Family |
Fabaceae or Papilionaceae |
Genus |
Styphnolobium |
Species |
japonicum |
Category |
Woody |
Type |
Tree (deciduous) |
Pronunciation |
USDA Hardiness Zone |
4-7 |
Temperature (°C) |
5C |
Temperature (°F) |
20F |
Height |
16-23 m |
Spread |
15 m |
General Description |
Large tree having a fairly round shape casting a dense shadow on the ground. The bark can resemble A. saccharum but is lighter in colour and the ridges are less pronounced. |
Cultivation |
Grows easily from seed which may benefit from scarification. Vulnerable to cold when young but becomes very hardy once is reaches a fair size. Difficult to train into a single leader, so be prepared to grow a multi-stemed tree. |
Shape |
Large rounded dense canopy. |
Growth |
Medium |
ID Characteristic |
Odd, compound leaves which are quite rich in colour. The tree casts a large, round, dense shadow. The bark is medium ridges. The fruit is a short, slim pod that has a very bitter taste to it; take my word on this fact. |
Pests |
Twig blight, canker, powder mildew, leaf hoppers and potato hoppers may be of concern. |
Habitat |
China and Korea. |
Bark/Stem Description |
Pale grayish in colour, furrowed with medium-deep ridges.The bark can resemble A. saccharum but is lighter in colour and the ridges are less pronounced. |
Flower/Leaf Bud Description |
Blackish in colour, minute, concealed by the leaf scar. |
Leaf Description |
Odd, pinnately compound, being 15-25 cm long with 7-17 leaflets. Leaflets tend to be lance-ovate in shape and are about 2-5 cm long. Leaflets are medium green on top and glaucous underneath, with a very rich , luxuriant colour to them. |
Flower Description |
The flowers are perfect, creamy white in colour and slightly fragrant. It blooms late in the season in North America sometime between July and August (zone dependent). |
Fruit Description |
The fruit is a pod, light-green in colour that changes to yellow, then brown: pods can remain on the tree over the winter. |
Colour Description |
Medium-green leaves, light gray bark and white-cream flowers. |
Texture Description |
Smooth leaves early in the season, becoming slightly leathery late in the season. |
Propagation |
Seed should be planted fresh, scarification may help but is not necessary for germination. |