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Old-growth hemlock, Huntingdon County, within the Alan Seeger Natural Area of Rothrock State Forest. The natural area protects a tract of old-growth forest (hemlocks, white pines, and mixed hardwoods) in a broad stream valley. The Detweiler Run Natural Area, another old-growth site, is nearby. Although the original forest of the area was largely logged off by the 1840s, many trees were spared—possibly because of property-boundary disputes or surveying errors. The researchers Nowacki and Abrams cored hemlocks at the site that are now more than 500 years old, as well as hardwoods that are nearly as old. Their research is published in the Bulletin of the Torrey Botanical Club (1994).

La foto ad alta risoluzione gratis albero, natura, foresta, ramo, pianta, escursioni a piedi, pista, foglia, fiore, tronco, giungla, autunno, botanica, flora, alberi, Creative Commons, conifero, abete rosso, foresta pluviale, midstatetrail, deciduo, tsugacanadensis, sottobosco, Pennsylvania, rododendro, oldgrowthforest, cicuta, easternhemlock, relictforest, huntingdoncounty, greenwoodspur, rothrockstateforest, alanseegernaturalarea, bosco, habitat, ecosistema, pianta fiorita, bioma, vecchia foresta di crescita, ambiente naturale, pianta legnosa, foresta temperata, temperata foresta di conifere, impianto di terra

, prese con un X500 01/30 2017 La foto scattata con 8.0mm, f/7.3s, 10/40s, ISO 80