Buxus sempervirens ‘Arborescens’ • Tree Boxwood

Buxus • Boxwood •  ツゲ  • 黄楊  • tsuge

The other day while checking on the fragrant Rh. luteum blooms behind the Tea House Garden I noticed strangely shaped boxwood by the fence – or rather unshaped, unclipped and allowed to grow how it pleases, almost like a tree, unlike many other manicured boxwoods that we have in the garden.  Intrigued, I noted its name, meaning to check  the internet later for clues on its shape, although its name ‘arborescents’ already indicates tree (latin ‘arbor’ = tree).  The write-up below from NCSU gives its common name as ‘Tree Boxwood’, which explains the puzzle (I added it to the heading above, but our Plant List just went to print with just ‘boxwood’)

The Plant List booklet informs that we have another buxus sempervirens ‘Arborescens’ growing by the East fence in Area C, half the size of the one by the West fence, but I haven’t looked at it yet to see the shape it is maintained in.

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SJG • 5/3/13 – Buxus sempervirens ‘Arborescens’ • Boxwood, 24′, Area ZZW (close to north end)

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SJG • 5/3/13 – Buxus sempervirens ‘Arborescens’ • Boxwood, 24′, Area ZZW (close to north end) -new leaves (light green) and older growth

From Barcham Tree Specialists, UK: (go to the link to see its interesting creamy yellow bloom: […] This large shrub can occasionally be classified as a small tree and is a clonal selection of common box that won the Award of Garden Merit in 2002.

The small but numerous evergreen leaves make this plant an ideal subject for screening / hedging.  If left unclipped it will eventually reach approximately 7 metres after about 40 years.
For those of you enjoy topiary, this is an ideal candidate. It thrives on most soils and doesn’t mind both sun and shade.

From NC State University:
Scientific Name – Buxus sempervirens ‘Arborescens’
Common Name – Tree boxwood

Hardiness Zones: 5 to 8
Habit: Evergreen
Growth Rate: Moderate
Site Requirements: Sun to partial shade; moist, well-drained soil
Height: 6 to 10 feet
Width: 3 to 4 feet
Texture: Fine
Form: Upright; conical to irregular form
Flower/Fruit: Non-showy flowers in spring
Foliage: Opposite, simple, lustrous dark green leaves

General info on box. sempervirens from wikipediaBuxus sempervirens (common box, European box, or boxwood), is a species of flowering plant in the genus Buxus, native to western and southern Europe, northwest Africa, and southwest Asia, from southern England south to northern Morocco, and east through the northern Mediterranean region to Turkey. […]

Description: Buxus sempervirens is an evergreen shrub or small tree growing to 1–9 m (3 ft 3 in–29 ft 6 in) tall, with a trunk up to 20 centimetres (7.9 in) in diameter (exceptionally to 10 m tall and 45 cm diameter). Arranged in opposite pairs along the stems, the leaves are green to yellow-green, oval, 1.5–3 cm long, and 0.5–1.3 cm broad. The hermaphrodite flowers are inconspicuous, greenish-yellow, with no petals, and are insect pollinated; the fruit is a three-lobed capsule containing 3-6 seeds.[…]

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