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The leaves ('needles') are, uniquely for a pine, usually single (not two or more in a fascicle, though trees with needles in pairs are found occasionally), stout, 4–6 cm (1 + 1 ⁄ 2 – 2 + 1 ⁄ 4 in) long, and grey-green to strongly glaucous blue-green, with stomata over the whole needle surface (and on both inner and outer surfaces of ...
Several features are used to distinguish the subgenera, sections, and subsections of pines: the number of leaves (needles) per fascicle, whether the fascicle sheaths are deciduous or persistent, the number of fibrovascular bundles per needle (2 in Pinus or 1 in Strobus), the position of the resin ducts in the needles (internal or external), the ...
Penstemon pinifolius, the pine-leaved penstemon or pine-needle beardtongue, [1] is a species of flowering plant in the plantain family Plantaginaceae, native to the southwestern USA. Growing to 20 cm (7.9 in) tall and broad, it is a small evergreen shrub with arching stems of narrow needle-like leaves and bright scarlet tubular flowers in summer.
A pine is any conifer tree or shrub in the genus Pinus (/ ˈ p aɪ n ə s /) [2] of the family Pinaceae. Pinus is the sole genus in the subfamily Pinoideae.. World Flora Online accepts 134 species-rank taxa (119 species and 15 nothospecies) of pines as current, with additional synonyms, [3] and Plants of the World Online 126 species-rank taxa (113 species and 13 nothospecies), [4] making it ...
Pinus albicaulis leaves are in fascicles (bundles) of five, and the cone is dark purple when immature (Mount Rainier National Park). Whitebark pine is a member of the white pine group, the Pinus subgenus Strobus, and the section Strobus; like all members of this group, the leaves (needles) are in fascicles (bundles) of five [5] with a deciduous sheath.
A forest of two-needle piñons in Grand Canyon National Park, Arizona. Genetic differentiation in the pinyon pine has been observed associated to insect herbivory and environmental stress. [5] [6] There are eight species of true pinyon (Pinus subsection Cembroides): [7] Pinus cembroides – Mexican pinyon; Pinus orizabensis – Orizaba pinyon
The bristlecone pine's root system is mostly composed of highly branched, shallow roots, while a few large, branching roots provide structural support. The bristlecone pine is extremely drought tolerant due to its branched shallow root system, its waxy needles, and thick needle cuticles that aid in water retention. [8] Gnarled bristlecone pine wood
The Albany Pine Bush Discovery Center is a nature center in Albany, New York with exhibits and activities about the Albany Pine Bush Preserve's natural history, geologic and cultural significance. The center offers public programs such as teaching programs for school groups, guided hikes, lectures and after school programs, all of which are led ...