Styphnolobium japonicum (Scholar-tree or Japanese pagoda tree)


Michael's Opinion

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.

Botanical Information

FamilyFabaceae or Papilionaceae
GenusStyphnolobium
Speciesjaponicum
CategoryWoody
TypeTree (deciduous)
Pronunciation

Details

USDA Hardiness Zone4-7
USDA Hardiness Ref.
Canada Hardiness Ref.
RHS Hardiness Ref.
Temperature (°C)5C
Temperature (°F)20F
Height16-23 m
Spread15 m
GrowthMedium
Flowering PeriodJuly, August

Description and Growing Information

General DescriptionLarge 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.
ID CharacteristicOdd, 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.
ShapeLarge rounded dense canopy.
PropagationSeed should be planted fresh, scarification may help but is not necessary for germination.
CultivationGrows 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.
PestsTwig blight, canker, powder mildew, leaf hoppers and potato hoppers may be of concern.
HabitatChina and Korea.
Bark/Stem DescriptionPale 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 DescriptionBlackish in colour, minute, concealed by the leaf scar.
Leaf DescriptionOdd, 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 DescriptionThe 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 DescriptionThe fruit is a pod, light-green in colour that changes to yellow, then brown: pods can remain on the tree over the winter.
Colour DescriptionMedium-green leaves, light gray bark and white-cream flowers.
Texture DescriptionSmooth leaves early in the season, becoming slightly leathery late in the season.

Photographs