Pinus × neilreichiana, as described in 1876 by Heinrich Wilhelm Reichardt (1874-1883), in Verh. K. K. Zool.-Bot. Ges. Wien 26, is commonly called Neilreich pine. This conifer is named in honor of Austrian lawyer and botanist, August Neilreich (1803-1871).
Description. Neilreich pine is the designation for natural and artificial hybrids of Austrian pine (Pinus nigra) and Scots pine (Pinus sylvestris). The hybrids are intermediate between the parents in some features, such as needle length at 2.8 to 4 inches (7 - 10 cm), but also bring together other characteristics of each parent. A casual observer interpreting a specimen may simply conclude that the hybrid is no more than a strange-looking specimen of either species.
Distribution. This hybrid occurs spontaneously in plantations outside of the natural range of one or bother parent species, but occurs naturally in the northwestern Balkan peninsula or in Turkey where that natural ranges of P. nigra and P. sylvestris most extensively overlap. Scientists have had mixed success with artificially creating this hybrid with some being successful only using Austrian pine as the seed parent, while others were successful only with Scots pine.
Hardy to Zone 5 - cold hardiness limit between -20° and -10°F (-28.8°C and -23.3°C).