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Cydonia oblonga Mill. - Cydonia vulgaris Pers.; Pyrus cydonia L. - Rosaceae - quince, Quitte

Deciduous shrub or small tree, to 8m high, native to West Asia, Caucasus, naturalized and cultivated elsewhere; branchlets purplish red when young, purplish brown when old; leaves ovate to oblong, densely villous; flowers white or pinkish, 4–5 cm in diam.
http://www.efloras.org/florataxon.aspx?flora_id=2&taxon_id=200010815

62 compounds were identified in the essential oil (steam distillation) of quince fruit, trans-α-farnesene (31.3%), (+)-trans-marmelo lactone (10.3%) and (-)-cis-marmelo lactone (13.0%) were detected as the major components. The marmelo lactones own a sweet and strong aroma and seem to contribute considerable to the main aroma of quince fruit. Some of the furfural (3.4%) probably is derived from the decomposition of precursors such as pentose and ascorbic acid in the process of steam distillation. The four stereoisomers of megastigma-4,6,8-trien-3-one (2.9%), theaspirane (2.9%), theaspirone (1.5%), vitispirane (1.0%), 3,4-dehydro-β-ionone (0.04%) and β-ionone (0.15%) contribute to quince aroma. Only small amounts (2.16%) of fruit esters are present, mostly ethyl caprylate (0.8%), ethyl caproate (0.4%) and cis-3-hexenyl caproate (0.3%).
[Volatile components of quince fruit (Cydonia oblonga Mill.)., Tsuneya, T., Ishihara, M., Shiota, H., Shiga, M., Agricultural and Biological Chemistry, Vol.47(11), 1983, 2495-2502]
http://www.tandfonline.com/doi/pdf/10.1080/00021369.1983.10865983

Thomé, O.W., Flora von Deutschland Österreich und der Schweiz, Tafeln, vol. 3: t. 419 (1885)
http://www.plantillustrations.org/species.php?id_species=304635