Phoebe hui Seeds | Hui’s Phoebe
LATIN NAME: Phoebe hui
COMMON NAME: Hui’s Phoebe
Plant Profile
Hui’s phoebe is a tree built around a single idea, a long, clean, cylindrical trunk, and it holds that form even in the open for its first twenty years. The lower branches shed as the crown closes, and the bark is smooth and grey, faintly mottled, and it stays that way well into maturity, splitting only on very old trunks. The leaves are evergreen, leathery and elliptic, seven to thirteen centimetres long, dark and glossy above and glaucous beneath, with eight to twelve pairs of lateral veins that stand out clearly on the underside. Crushed leaves have the peppery, slightly camphoraceous smell of the laurel family.
The flowers are small, yellowish green and borne in loose panicles among the new leaves in spring, and they are not the reason to grow the tree. The fruits are. They are oval drupes that turn from green to blue-black as they ripen in autumn, each sitting in a persistent cup that gives the cluster the look of a miniature acorn crop, and birds take them steadily. The species is native to the humid valleys of Sichuan, Hubei, Guizhou and northeastern Yunnan, generally between six hundred and fifteen hundred metres, in mixed broadleaved forest on deep, acid, well-drained soil. It grows best where the air is moist and the summers are long, and it is markedly less tolerant of drought than the oaks and castanopsis it grows among.
Science & Biotechnology
The wood is the reason the species is studied, and the anatomy explains the reputation. Phoebe timber contains chains of oil cells scattered through the xylem, and when the wood is cut on the quarter these appear as darker, shimmering streaks against the pale ground, the effect the Chinese trade calls golden thread. The oil is a complex mixture of sesquiterpenes and phenolic compounds, and it is responsible for the faint, persistent fragrance that keeps insects out of chests and wardrobes made from the wood. Studies of the genus have characterised the essential oil from bark and leaves, compared it across species, and confirmed that the timber of Phoebe hui is close to but distinct from that of Phoebe zhennan, the tree most closely associated with imperial construction.
Work on the genus also covers its place in the laurel family, where molecular data have reshaped the old division between Phoebe, Persea and Machilus, and its seed biology, which is awkward for growers. The seed is recalcitrant: it has no dormancy, it cannot be dried, and it loses viability within weeks if kept at room temperature. That makes the species dependent on a continuous supply of fresh seed and explains why it is rarely offered in the ordinary trade. Conservation genetics has become important as well, since the remaining stands are fragmented and the species is protected in China, and studies of the soil fungi associated with its roots suggest that seedling establishment depends on a well-developed mycorrhizal community.
Uses & Benefits
Nanmu is one of the great timbers of East Asia. It is soft enough to work with hand tools, stable in service, resistant to insects and to rot, and it holds a fine finish, which is why it was used for temple columns, coffins, document chests and the frames of scholar’s furniture. The trade recognises several grades, and Hui’s phoebe sits among the respected ones without reaching the legendary status of zhennan. Almost all of that wood now comes from plantation thinning or from salvage, because the wild trees are protected and the remaining old-growth stands are small. Buyers should ask where the timber came from, and should be sceptical of cheap material sold as nanmu.
In the garden the tree is grown for evergreen structure rather than for flowers. It makes a dense, dark, formal canopy that holds its shape all year, and it is a good subject for a sheltered courtyard, a woodland edge or an avenue in a warm, humid climate. It needs deep soil, shelter from drying wind, and space for the trunk to develop without competition. Young plants are slow and should be kept in light shade for their first two or three seasons. Once established they grow steadily, adding perhaps forty to sixty centimetres a year, and they begin to fruit at around fifteen years.
Growing from Seed
The seed must be fresh, and it must not be allowed to dry out at any stage. Clean the pulp from the drupes by rubbing them in water, and sow at once in a mix of leaf mould, coarse sand and loam, with the seed just covered. Keep the tray at around twenty to twenty-five degrees, in bright but filtered light, and maintain constant moisture without saturation. Germination is spread over four to ten weeks and is seldom complete; expect perhaps half of a good batch to come up. A cover of glass or a clear lid helps hold humidity, but the tray must be ventilated daily to prevent damping off.
Prick the seedlings out as soon as the first true leaves are open, into deep pots, because the root is long and straight and resents disturbance. Grow them on in a shaded frame for the first year, then gradually into more light. Plant out in spring into deep, humus-rich, acid soil, with shelter from wind and afternoon sun while the tree is young. Mulch annually with leaf mould, keep the ground clear of grass for the first three years, and water in dry spells. The species is not frost-hardy when young, and late frost on new growth can set it back badly.
Our Take
Hui’s phoebe is a long project, and it should be started with that in mind. Fresh seed, deep acid soil and patience will produce a tree of real presence, with evergreen shade and the fragrance of nanmu in its wood.
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