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''Papuacedrus papuana'' is a species in the conifer family Cupressaceae, the sole species in the genus ''Papuacedrus''. Some botanists do not consider this species as forming a distinct genus, but include it in the related genus ''Libocedrus''. It is native to New Guinea and to the Indonesian Province of Maluku.〔 It is usually a medium-sized to large evergreen tree 16–50 m tall, at high altitudes only a shrub reaching up to 3 m). The foliage is borne in flat sprays, with the leaves scale-like, in opposite pairs, with facial and lateral pairs alternating; the lateral leaves are larger, 2–3 mm long on mature trees and up to 20 mm long on young trees, the facial leaves smaller, 1 mm on mature trees and up to 8 mm on young trees. The cones are 1–2 cm long, with four scales, a small, sterile basal pair, and a larger fertile pair; the fertile scales each bearing two winged seeds.〔Farjon, A. (2001). World Checklist and Bibliography of Conifers , ed. 2: 1-309. The Royal Botanic Gardens, Kew.〕 The species has two varieties, most readily distinguishable as young plants with juvenile leaves (the adult foliage being nearly indistinguishable): *''Papuacedrus papuana'' var. ''papuana'' (syn. ''Libocedrus papuana'' F.Muell., ''Libocedrus torricellensis'' Schltr., ''Papuacedrus torricellensis'' (Schltr.) H.L.Li). New Guinea, east of 138°E longitude; 620-3,800 m altitude. Juvenile leaves with a spreading, hook-like apex. *''Papuacedrus papuana'' var. ''arfakensis'' (Gibbs) R.J.Johns (syn. ''Libocedrus arfakensis'' Gibbs, ''Papuacedrus arfakensis'' (Gibbs) H.L.Li). New Guinea, west of 138°E longitude, Moluccas; 700-2,400 m altitude. Juvenile leaves not spreading, the apex not free from the shoot. ==References== * *Farjon, A. (2005). ''Monograph of Cupressaceae and Sciadopitys''. Royal Botanic Gardens, Kew. ISBN 1-84246-068-4. *(Gymnosperm Database: ''Papuacedrus'' ) 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Papuacedrus」の詳細全文を読む スポンサード リンク
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