What are the characteristics of common edible mushroom spawn?

I. Characteristics of normal mother spawn:

1. Uniform, vigorous growth, with smooth, plump edges.

2. Consistent, even coloration, with normal pigment secretion.

3. Good growth vigor, with normal speed.

4. Vigorous, robust mycelium, with no antagonism.

II. Characteristics of main varieties:

1. Enoki mushroom (Flammulina velutipes): Mycelium pure white, tufted, but the hairs are relatively short like cotton fluff, with white or pale spore powder.

2. Shaggy ink cap mushroom (Coprinus comatus): Mycelium white or slightly pale yellow, tufted, aerial-type mycelium, semi-reclining, mycelial tips clearly visible, mycelium fine and dense, fast-growing, secreting grayish-brown pigment in the later stage, appearing distinctly black or pale black when viewed from behind the test tube.

3. Buna-shimeji (Hypsizygus marmoreus): Mycelium pure white, dense, with vigorous aerial mycelium.

4. Himematsutake (Agaricus blazei): Mycelium pale white, mainly slightly earthy yellow, slender, growing uniformly and evenly, with little aerial mycelium, and a small amount of coarse mycelial substance may appear in the later growth stage; the growth time is 2 times that of oyster mushroom. Generally subcultured onto manure-straw juice + PDA medium.

5. Poplar mushroom (Agrocybe aegerita): Mycelium white, tufted, relatively fine, growing vigorously, uniform, with little aerial mycelium, and a small amount of brown secretion in the later stage.

6. White Lingzhi mushroom (Pleurotus nebrodensis), also called Ferula mushroom: Mycelium white, dense, thick and sturdy, tightly packed, with relatively little aerial mycelium.

7. King oyster mushroom (Pleurotus eryngii): Mycelium white, dense and sturdy, with neat edges, growing vigorously, aerial mycelium, similar to oyster mushroom. The mycelium has especially strong vitality.

8. Abalone mushroom (Pleurotus cystidiosus): Mycelium dense, white, relatively fine, growing vigorously, with pale black powder spores in the later stage.

9. Wine-cap stropharia (Stropharia rugosoannulata): Mycelium white or pale earthy yellow, relatively fine and sparse, with little aerial mycelium, growing relatively slowly.

10. Poria (Wolfiporia cocos): Mycelium pale white, sparse, with little aerial mycelium, mycelium loose, with brown exudate in the later stage, growing relatively slowly.

11. Armillaria (Armillaria mellea): A symbiotic fungus of Gastrodia elata. Mycelium white, growing and extending into the medium to form rhizomorphs, with edges either black or white; the upper part of the test tube gradually turns pale black, and when the rhizomorphs are left for too long, fluorescence may be visible. If not well prepared, it may contain contaminating microorganisms.

12. Button mushroom (Agaricus bisporus): Mycelium white with a pale earthy yellow tinge, generally semi-aerial and semi-reclining, with relatively thick rhizomorphs, distinct tips, and relatively slow growth.

13. Lion's mane mushroom (Hericium erinaceus): Mycelium white, sparse, distributed in star-like spots; after secondary spawn, the mycelium appears dense and white.