Acer L. (Acer campestre L., Acer platanoides L., Acer pseudoplatanus L.)
The fruits of Acer species, known as samaras, ripen in the mid-autumn (October), when they turn brown, indicating that they are ready for collection (Bacchetta, 2006; Navarro Cerrillo and Herrero Sierra, 2012). Fruit production varies significantly between years. Although most seeds fall easily, some can remain on the tree until the next reproductive season (Bonner and Karrfalt, 2008; Navarro Cerrillo and Herrero Sierra, 2012). Fruits are usually collected manually, using methods such as raking, sweeping, specialized vacuum cleaners, or by shaking or cutting branches (Božić et al., 2021). After collection, fruits of Acer with orthodox seeds (see below) should be dried on a nonhumidity absorbing surface, such as wood, in a well-ventilated place, with regular turning to ensure uniform drying (Burdekin and Rowe, 1982). Removing the wings from the samaras with machines, like bending-type devices, is uncommon as it can reduce the fruit quality (Gordon, 1992; Piotto and Di Noi, 2003; Navarro Cerrillo and Herrero Sierra, 2012).
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2025
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