油樟 you zhang

Cinnamomum inunctum (Nees) Meisner var. longepaniculatum Gamble in Sargent, Pl. Wilson. 2: 69. 1914.

Trees, up to 20 m tall, to 50 cm d.b.h. Bark gray, smooth. Branchlets terete, glabrous; young branchlets slender, ± compressed, glabrous. Buds larger, ovoid, up to 8 mm; bud scales dense, ovate, apiculate, densely gray puberulent. Leaves alternate; petiole greenish red, 2-3.5 cm, plano-convex, glabrous; leaf blade gray-green and opaque abaxially, dark green and shiny adaxially, ovate or elliptic, 6-12 × 3.5-6.5 cm, thinly leathery, glabrous on both surfaces, pinninerved, lateral veins 4 or 5 pairs, basal ones sometimes opposite and becoming triplinerved, lateral veins and midrib elevated on both surfaces, evanescent within margin, axils of lateral veins dome-shaped abaxially, bullate adaxially, transverse veins ± conspicuous on both surfaces, veinlets reticulate and foveolate under lens, base cuneate to subrounded, margin cartilaginous and involute, apex abruptly shortly acuminate to acuminate and sometimes triplinerved, falcate. Panicle axillary, slender, 9-20 cm, branched; branches slender, divaricate, up to 5 cm, dichotomous at top, each branchlet bearing a 3-7-flowered cyme; peduncle slender, 3-10 cm, peduncle and rachis glabrous. Pedicels slender, 2-3 mm, glabrous. Flowers yellowish, scented, ca. 2.5 mm, up to 4 mm in diam. when open. Perianth tube obconical, ca. 1 mm; perianth lobes 6, ovate, ca. 1.5 mm, subequal, acute, glabrous outside, densely white sericeous-villous inside, glandular. Fertile stamens 9, ca. 1.5 mm (of 1st and 2nd whorls) or ca. 1.8 mm (of 3rd whorl); filaments white villous, those of 3rd whorl each with 2 shortly stalked orbicular-reniform glands at base, others glandless; anthers ovate-oblong (of 1st and 2nd whorls) or oblong and slightly shorter than filament (of 3rd whorl), all 4-celled; cells introrse (of 1st and 2nd whorls) or extrorse (of 3rd whorl). Staminodes 3, ca. 1 mm, white villous. Ovary ovoid, ca. 1 mm, glabrous; style slender, ca. 1.5 mm; stigma inconspicuous. Young fruit green, globose, ca. 8 mm in diam.; perianth cup in fruit ca. 5 mm, apex discoid-dilated, up to 4 mm wide. Fl. May-Jun, fr. Jul-Sep.

● Evergreen broad-leaved forests; 600-2000 m. Sichuan.

The branchlets and leaves contain essential oil; the main chemical constituents of the oil are cineole, linalol, and camphor. The fruit kernel contains oil and fat.