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Pinus strobiformis, also known as Chihuahua white pine, is a medium-sized white pine tree endemic to western Mexico in the Sierra Madre Occidental mountain range. It is typically a high-elevation pine growing mixed with other conifers in montane forest .
Mature Pinus pinea (stone pine); note umbrella-shaped canopy: Pollen cones of Pinus pinea (stone pine): A red pine (Pinus resinosa) with exposed rootsYoung spring growth ("candles") on a loblolly pine
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Pinus, the pines, is a genus of approximately 111 extant tree and shrub species. The genus is currently split into two subgenera: subgenus Pinus (hard pines), and subgenus Strobus (soft pines). Each of the subgenera have been further divided into sections based on chloroplast DNA sequencing [1] and whole plastid genomic analysis. [2]
Members of the modern genera Pinus (pines), Picea (spruce) and Cedrus (cedar) first appear during the Early Cretaceous. [19] [20] [21] The extinct Cretaceous genera Pseudoaraucaria and Obirastrobus appear to be members of Abietoideae, while Pityostrobus appears to be non-monophyletic, containing many disparately related members of Pinaceae. [18]
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This ecoregion is one of the rare areas of pine forest in the tropics with the dominant species Sumatran pine (Pinus merkusii), which has become established in areas where rainforest has been disturbed throughout history by events including landslides and forest fires, as well as human clearance. Forest fire is an ongoing and continuous feature ...
Pinus stylesii is a species of pine in the family Pinaceae, native to the northern Sierra Madre Oriental mountains of northeastern Mexico. [1] A tree reaching 25 m (82 ft), it is a member of Pinus subsection Strobus. [2] It was split off from Pinus strobiformis, which is found in the Sierra Madre Occidental. [2]