Мексикалық қарағай (Pinus cembroides) сипаттамасы

Species of conifer

Pinus cembroides, also known as pinyon pine, Mexican pinyon, It lives in areas with little rainfall, which fluctuates between to , the subspecies orizabensis (Pinus orizabensis) is found farther south in the state of Veracruz. There is also a disjunct population in the Sierra de la Laguna of southern Baja California Sur. It occurs at moderate altitudes, mostly from to .

Pinus cembroides is a small to medium size tree, reaching to tall and with a trunk diameter of up to The bark is dark brown, thick and deeply fissured at the base of the trunk. The leaves ('needles') are in mixed pairs and threes, slender, to long, and dull yellowish green, with stomata on both inner and outer surfaces. The cones are globose, to long and broad when closed, green at first, ripening yellow brown when 18–20 months old, with only a small number of thick scales, with typically 5 12 fertile scales. The cones open to to broad when mature, holding the seeds on the scales after opening. The seeds are to long, with a thick shell, a pink endosperm, and a vestigial 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. Abert's squirrel also feeds on the seeds in preference to those of the ponderosa pine.

Mexican pinyon was the first pinyon pine described, named by Zuccarini in 1832. Many of the other pinyon pines have been treated as varieties or subspecies of it at one time or another in the past, but research in the last 10–50 years has shown that most are distinct species. Some botanists still include Johann's pinyon and Orizaba pinyon in Mexican pinyon; the former accounts for records of "Mexican pinyon" in southern Arizona and New Mexico. Mexican pinyon is a relatively non variable species, with constant morphology over the entire range except for the disjunct population in the Sierra de la Laguna pine oak forests of Baja California Sur; this is generally treated as a subspecies, Pinus cembroides subsp. lagunae, although some botanists treat it as a separate species, P. lagunae. This subspecies differs from the type in having slightly longer leaves, between and and longer, narrower cones, up to long. The seeds are widely collected in Mexico, being the main edible pine nut in the region. While palatable when raw, their flavor is considered to be improved when roasted.