| 词条 | Juniperus lutchuensis |
| 释义 |
| genus = Juniperus | species = lutchuensis | authority = Koidz. }}Juniperus lutchuensis (Ryukyu Islands juniper; Japanese: オキナワハイネズ Okinawa-hainezu; syn. Juniperus taxifolia var. lutchuensis (Koidz.) Satake) is a species of juniper, native to the Ryukyu Islands, Izu Ōshima and the adjacent coast of Shizuoka Prefecture in Japan.[1][2] Description'Juniperus lutchuensis is an evergreen coniferous shrub growing to a height of 1–3 m. The leaves are needle-like, in whorls of three, light green, 7–14 mm long and 1-1.5 mm broad, with a double white stomatal band (split by a green midrib) on the inner surface. It is dioecious, with separate male and female plants. The seed cones are berry-like, green ripening in 18 months to purple-brown; they are spherical, 8–9 mm diameter, and have three or six fused scales in one or two whorls of three; the three larger scales each bear a single seed. The seeds are dispersed when birds eat the cones, digesting the fleshy scales and passing the hard seeds in their droppings. The pollen cones are yellow, 5 mm long.[1] TaxonomySome authors[3] treat it as a synonym of Juniperus taxifolia from the Bonin Islands, while others treat it as a variety of it, Juniperus taxifolia var. lutchuensis.[2] It is probably best considered a separate species as it has a distinct DNA profile clearly different from J. taxifolia.[1] ConservationIts conservation status is uncertain (Data Deficient) but it is rare and may become threatened.[1][2] References1. ^1 2 3 Adams, R. P. (2004). Junipers of the World. Trafford. {{ISBN|1-4120-4250-X}} {{Taxonbar|from=Q1813972}}2. ^1 2 Yasushi laboratory: Juniperus taxifolia var. lutchuensis{{dead link|date=December 2017 |bot=InternetArchiveBot |fix-attempted=yes }} (in Japanese; [https://translate.google.com/translate?hl=en&sl=ja&u=http://plantdb.ipc.miyakyo-u.ac.jp/php/view.php%3Fplant_id%3D5919&sa=X&oi=translate& google translation]) 3. ^Farjon, A. (2005). Monograph of Cupressaceae and Sciadopitys. Royal Botanic Gardens, Kew. {{ISBN|1-84246-068-4}} 4 : Juniperus|Endemic flora of Japan|Flora of the Ryukyu Islands|Trees of Japan |
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