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Pinus remota
''Pinus remota'', commonly known as the Texas pinyon or papershell pinyon, is a pine in the pinyon pine group, native to southwestern Texas and northeastern Mexico. Pinus remota is distinguished from other species of pinyon by its thin-walled seeds, which made it especially attractive as a food to Indians and Mexicans living where it grew. Spanish explorer Cabeza de Vaca noted that the papershell pinon was an important food for the Indians in 1536.
==Description==
''Pinus remota'' is a small tree or large shrub, reaching 3-10 m tall and with a trunk diameter of up to 40 cm. The bark is thick, rough, and scaly. The leaves ('needles') are in mixed pairs and threes (mostly pairs), slender, 3-5 cm long, and dull gray-green, with stomata on both inner and outer surfaces. The cones are squat globose, 3-5 cm long and broad when closed, green at first, ripening yellow-buff when 18–20 months old, with only a small number of thin scales, with typically 5-12 fertile scales.
The cones open to 4-6 cm broad when mature, holding the seeds on the scales after opening. The seeds are 10-12 mm long, with a very thin shell, a white endosperm, and a vestigial 1-2 mm wing; they are dispersed by the western scrub jay, which plucks the seeds out of the open cones. The jay, which uses the seeds as a food resource, stores many of the seeds for later use, and some of these stored seeds are not used and 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）』
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