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''Pinus orizabensis'', the Orizaba pinyon, is a pine in the pinyon pine group, endemic to central Mexico. It is considered also as a sub-species of Pinus cembroides which is classified as ''Pinus cembroides'' subsp. ''orizabensis'' D.K.Bailey. It has larger seeds than the type. The range is localised, confined to a small area in the eastern Eje Volcánico Transversal range (Trans-Mexican Volcanic Belt), in the states of Puebla and Veracruz. It occurs at high altitudes, mostly from , in a cooler, moister climate than the other pinyon pines. ==Description== It is a small to medium-size tree, reaching tall and with a trunk diameter of up to 50 cm. The bark is dark brown, thick and deeply fissured at the base of the trunk. The leaves ('needles') are in mixed fascicles of three and four, slender, 3–6 cm long, and deep green to blue-green, with stomata confined to a bright white band on the inner surfaces. ;Cones The cones are globose to ovoid, 4–7 cm long and 3–5 cm broad when closed, green at first, ripening yellow-brown when 16–18 months old, with only a small number of thin scales, typically 6-18 fertile scales. The cones open to 5–7 cm broad when mature, holding the seeds on the scales after opening. The seeds are 12–15 mm long, with a thick shell, a pink endosperm, and a vestigial 2 mm wing; they are dispersed by the Mexican jay, which plucks the seeds out of the open cones. The jay, which uses the seeds as a major food resource, stores many of the seeds for later use, and some of these stored seeds are not used and are able to grow into new trees. 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「Pinus orizabensis」の詳細全文を読む スポンサード リンク
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