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. |