Calocedrus macrolepsis, first described in 1873 by Wilhelm Sulpiz Kurz (1834–1878), is commonly known as Chinese incense-cedar, as Bách xanh, Tùng hương, Pơ mu giả, Trắc bách diệp núi in the Vietnamese language, or as 崔柏 (Cuī bǎi) in Chinese. This is still sometimes seen listed and remains a synonym for Libocedrus macrolepis.
Description. Chinese incense-cedar is an evergreen coniferous species of tree which will grow to a mature height of 50 to 80 feet (15 – 25 m) tall with a 24 to 32 inch (60 – 80 cm) diameter trunk at breast height. It’s bole is straight when young, but often becoming twisted once over 30 feet (10 m) high. It’s bark is dark brown with longitudinal fissures. It is well branched when young, with big branches growing nearly horizontal, producing an oviform crown. Leaves are scaly and closely inserted on twigs into nodes, each node with two large leaves and two smaller opposite leaves. Female cones are oval, very small, green when young, becoming violet-brown, lignified and opening into 3 fragments when mature with the middle fragment bearing 2 big winged seeds which mature in October-December.
Distribution. This species is native to
- northeastern Myanmar
- China — Guangxi, Guizhou, Hainan, Taiwan, & Yunnan provinces growing at elevations of 1,000 to 6,500 feet (300 – 2,000 m) above sea level
- Vietnam —Khanh Hoa, around Da Lat city in Lam Dong, and at Ba Vi mountain in Ha Tay.
It prefers a humid climate and yellow ferallitic soils with shallow or moderately thick, but humus-rich surface layers. It grows at elevations above 3,000 feet (900 m) in closed and open evergreen subtropical forests, in mountainous areas.
a report from JC Raulston Arboretum expressing enthusiasm over the introduction of a new landscape subject:
Attributed from: Forest Inventory and Planning Institute. ©1996. Vietnam forest trees. Hanoi: Agricultural Publishing House. Pp 1-23.
At the JCRA, we are always on the lookout for new screening evergreens. In this regard, we have seen C. decurrens (California incense-cedar) used successfully in several southern and mid-Atlantic states. However, it is only through recent plant expeditions conducted by Heronswood Nursery (Kingston, WA) that new germplasm of this sister Chinese species has become available. Chinese incense-cedar forms an upright evergreen tree or tall hedge/screen with rich blue-green foliage. We have been pleasantly surprised with the performance of several Asian Cupressaceae and expect nothing less from this species.