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5. Chamaecyparis obtusa (Siebold & Zuccarini) Endlicher, Syn. Conif. 63. 1847.
日本扁柏 ri ben bian bai
Trees to 40 m tall; trunk to 3 m d.b.h.; bark light reddish brown, peeling off in thin strips; crown narrowly pyramidal; branches drooping to pendulous. Leaves of ultimate branchlets ridged abaxially, apex obtuse or subacute; facial leaves green or yellowish green, rhomboid, 1-1.5 mm, abaxial gland absent; leaves on lower side of branchlets glaucous, with a whitish basal part; lateral leaves 1-3 mm, apex incurved. Pollen cones ellipsoid, ca. 3 mm; microsporophylls ca. 12; pollen sacs yellow. Seed cones reddish brown when ripe, globose, 1-1.2 cm in diam.; cone scales 8-10, each fertile scale with 2-5 seeds. Seeds lustrous reddish brown, obovoid or suborbicular, flattened, 3-3.5 mm in diam., including wings. Pollination Apr, seed maturity Oct-Nov.
Forests in mountain regions, also cultivated for ornament and planted for timber and afforestation; below 2800 m. Native in Taiwan; introduced in Guangdong, Guangxi, Henan, Jiangsu, Jiangxi, Shandong, Yunnan, Zhejiang [Japan].
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Leaves of ultimate branchlets thick, apex obtuse; facial leaves 1-1.5 mm; lateral leaves ca. 3 mm; seeds suborbicular, ca. 3 mm (including wings) |
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5a var. obtusa |
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Leaves of ultimate branchlets thin, apex subacute; facial leaves 1-1.2 mm; lateral leaves 1-2 mm; seeds obovoid, 3-3.5 mm (including wings) |
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5b var. formosana |
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Lower Taxa
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Treatments in Other Floras @ www.efloras.org
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