Ilex crenata • Japanese Holly • イヌツゲ • 犬黄楊 • inu-tsuge
We have 52 of them, measuring about 5′ tall, making the SW border of Area B, outside of Tateuchi Community Room.
From Missouri Botanical Garden: Noteworthy Characteristics: This evergreen Japanese holly cultivar is an exceedingly narrow, fastigiate form which grows somewhat slowly in a vertical, pencil-like column to 10′ tall but only 2-3′ wide. A typical 4-6′ tall specimen may only be 10-12″ wide. ‘Sky Pencil’ is an introduction of the U.S. National Arboretum in Washington, D.C. Features elliptic to obovate, small dark green leaves (typically 1/2 to 1 1/4″ long) which have serrulate margins, particularly at the rounded tips. Japanese holly foliage somewhat resembles boxwoods more than hollies. Tiny, greenish-white flowers appear along the stems in the leaf axils in late spring. If pollinated, the flowers give way to purple, berry-like drupes (1/4″ diameter) in fall. Flowers and fruit are inconspicuous.
From The Unites States National Arboretum: The U.S. National Arboretum presents Ilex crenata ‘Sky Pencil’, a unique form of Japanese holly that makes a living exclamation point in the landscape! The strongly fastigiate, pencil-thin growth habit and lustrous, dark evergreen leaves provide a rare, natural, vertical accent in the landscape. Even the smallest of spaces can accommodate this excellent and durable holly. […]
Development: Discovered in the wild on Mount Daisen, Honshu, Japan, by Norihiro Shibamichi, this upright holly found its way to the private collection of Dr. Masato Yokoi, Kawaguchi City, Japan. Dr. Yokoi donated propagation material of this selection to Sylvester March, U.S.N.A., and Frederick Darke, Longwood Gardens, during a 1985 U.S. National Arboretum collecting trip. It was propagated and distributed as ‘Sky Pencil’ through the Elite Plant Program in 1992. […]