GB/T 38581-2020Oak mushroom (English PDF)

3.1 oak mushroom

a class of large fungus belonging to Fungi, Basidiomycota, Agaricales, Omphalotaceae and Lentinula

Note 1: Common names are fragrant fungus, Shiitake and Lentinus edodes.

Note 2: In trade, it is customary to call oak mushrooms with natural cracks on the surface of the cap as shiitake mushroom, and the oak mushrooms are classified into thick mushrooms and thin mushrooms according to the thickness of the cap, and are classified into spring mushrooms and autumn mushrooms according to the cultivation season.

3.2 lamellae; gill

flake structures arranged radially perpendicular to the underside of the cap, on which basidiums are formed to generate basidiospores

[GB/T 12728-2006, Definition 2.2.35]

3.3 inner veil

pellicle formed by the connection of the cap and stipe of some agarics to cover the lamellae

[GB/T 12728-2006, Definition 2.2.43]

3.4 diameter of the cap

Phimax length of the maximum cross section of the cap

3.5 fresh Lentinula edodes

oak mushroom sold directly after harvest

3.6 dry Lentinula edodes

dried oak mushroom

Note: The dry Lentinula edodes in this standard include whole oak mushrooms, oak mushroom stipe, oak mushroom powder, oak mushroom granule (diced), oak mushroom shred and oak mushroom slice.

3.7 extraneous matter

foreign bodies other than oak mushroom

4.1 Sensory requirements

4.1.1 Basic requirements

The oak mushrooms shall meet the following basic requirements:

- - No hair, metal, glass, sand and stone or animal excrement;

- - No mildew mushroom;

- - Have the odor that is specific to oak mushroom, without peculiar smell.

4.1.2 Fresh Lentinula edodes

The fresh Lentinula edodes shall be fresh and are classified into three grades according to form, and each grade is classified into five specifications; and they shall meet the requirements of Table 1 in other aspects. Those which can not be classified as Grade I, Grade II or Grade III but have not lost their edible value are classified as off grade. For those marked as Shiitake mushroom, there shall be obvious natural cracks on the surface of the cap, and the cracks are white, milky white and brown.