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・ Juniperus foetidissima
・ Juniperus formosana
・ Juniperus gamboana
・ Juniperus gracilior
・ Juniperus grandis
・ Juniperus horizontalis
・ Juniperus indica
・ Juniperus jaliscana
・ Juniperus komarovii
・ Juniperus lutchuensis
・ Juniperus macrocarpa
・ Juniperus macropoda
・ Juniperus maritima
・ Juniperus monosperma
・ Juniperus monticola
Juniperus occidentalis
・ Juniperus osteosperma
・ Juniperus oxycedrus
・ Juniperus phoenicea
・ Juniperus pinchotii
・ Juniperus pingii
・ Juniperus procera
・ Juniperus procumbens
・ Juniperus przewalskii
・ Juniperus pseudosabina
・ Juniperus recurva
・ Juniperus rigida
・ Juniperus sabina
・ Juniperus saltillensis
・ Juniperus saltuaria


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Juniperus occidentalis : ウィキペディア英語版
Juniperus occidentalis

''Juniperus occidentalis'' (western juniper or Sierra juniper) is a shrub or tree native to the western United States, growing in mountains at altitudes of and rarely down to .
==Description==

The ''Juniperus occidentalis'' shoots are of moderate thickness among junipers, 1-1.6 mm diameter. The leaves are arranged in opposite decussate pairs or whorls of three; the adult leaves are scale-like, 1–2 mm long (to 5 mm on lead shoots) and 1-1.5 mm broad. The juvenile leaves (on young seedlings only) are needle-like, 5–10 mm long. The cones are berry-like, 5–10 mm in diameter, blue-brown with a whitish waxy bloom, and contain one to three seeds; they are mature in about 18 months. The male cones are 2–4 mm long, and shed their pollen in early spring.
The cones are an important food for several birds, including American robin, Clark's nutcracker, phainopepla and cedar waxwing; these digest the fleshy cone scales and disperse the seeds in their droppings. The plants often bear galls caused by the juniper tip midge ''Oligotrophus betheli'' (Bibionomorpha: Cecidomyiidae); these are violet-purple fading to brown, 1–2 cm diameter, with dense modified spreading scale-leaves 6–10 mm long and 2–3 mm broad at the base.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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