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Hydrangea paniculata ‘Kyushu’

Hydrangea paniculata cv. Kyushu

Panicled Hydrangea

KingdomPlantaePlants, but not fungi, lichens, or algae (from Stearn’s Botanical Latin)
SubkingdomTracheobiontaVascular plants—plants with a “circulatory system” for delivering water and nutrients
DivisionMagnoliophytaFlowering plants, also known as angiosperms
ClassMagnoliopsidaDicotyledons—plants with two initial seed leaves
SubclassRosidaeRoses, legumes, proteas, dogwoods, hydrangeas, mistletoes, euphorbias, grapes, many more
OrderRosalesRose family and eight others
FamilyHydrangeaceaeHydrangea family
GenusHydrangeaFrom Greek hydro, “water,” and angeion, “vessel”
SpeciespaniculataWith the flowers in panicles
Cultivar‘Kyushu’

About plant names...

Panicled hydrangea is native to Japan and China. It is not found in the wild in North America. They are “panicled” because their flower clusters are more cone-shaped (like panicles) vs. the ball-shaped flowerheads of other hydrangeas. Flower color in some hydrangeas is influenced by soil pH, but this is not true for this one. Hydrangea paniculata ‘Kyushu’ is a cultivated variety which grows into a small tree rather than a shrub. The branches are somewhat fountain-like, gracefully curved. ‘Kyushu’ isn’t really a cultivated variety. According to the story, it was found by Captain Collingwood Ingram on a volcanic slope in Kyushu, Japan and given to the Kalmthout Arboretum in Belgium, which distributed it as a cultivar. So it sounds to me like it is a natural subspecies.

Identification: These small trees reach heights of 10-30' (3-9.1 m), and somewhat less in diameter. Leaves are opposite, roughly oval shaped, with serrated edges, 2-5" (5-12 cm) long. Blooms are white or pink, cone-shaped, in clusters up to 10" (25 cm) long and 8" (20 cm) around. They bloom from July to September. See this Hydrangea comparison table.

Online References:

Hydrangea paniculata ‘Kyushu’ on www.canadaplants.ca

Hydrangea paniculata ‘Kyushu’ on Horticopia

Hydrangea paniculata at the University of Connecticut Plant Database

Hydrangea paniculata (Panicled Hydrangea)

9/7/2010 · Tower Hill Botanic Garden, Boylston, MA
≈ 21 × 31" (52 × 78 cm)

Hydrangea paniculata ‘Kyushu’ description by Thomas H. Kent, last updated 16 Aug 2013.

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Hydrangea paniculata (Panicled Hydrangea)

9/7/2010 · Tower Hill Botanic Garden, Boylston, MA
≈ 21 × 31" (52 × 78 cm)

Hydrangea paniculata (Panicled Hydrangea)

9/7/2010 · Tower Hill Botanic Garden, Boylston, MA
≈ 12 × 8" (31 × 20 cm)

Range: Zones 4-9:

About this map...