Fritillaria cirrhosa is a perennial herb of Liliaceae, which has many varieties and can be divided into three specifications: pine shell, green shell and furnace shell, and its medicinal properties are different.

Pine shells are ovoid with uniform particle size, and the diameter is generally less than 1 cm. The top is slightly pointed and closed. The bottom is flat and can be placed upright. The two scales on the outer layer are very different in size, and the small scale is wrapped in a heart-shaped large scale, leaving a crescent-shaped part outside, commonly known as "holding the moon in your arms". The appearance is pure white and shiny. The texture is hard and crisp, and the powder is enough.

Green shellfish: oblate, with two scales on the outer layer of similar size. The top is open, and there are several small scales in it. The particles are skewed and cannot be placed upright. The appearance is pale yellow and white, and the texture is loose and powdery.

Furnace shell: mostly prismatic or conical, with large particles and shaped like horse teeth, so it is commonly known as "horse teeth mouth". Crispy and powdery. These three kinds of Fritillaria are slightly gassy and slightly bitter.

Fritillaria thunbergii is the bulb of Fritillaria thunbergii in Liliaceae.

(1) Pinctada is a complete bulb, oblate, with a diameter of 1-2.5cm. The surface is white, and the outer two scales are thick and involuted, with 2-3 small scales and residual stems inside. Strong and brittle, easy to break, white cross section, rich in powder. Slight breath and bitter taste. (2) Yuan Baobei (big shellfish) is a single-petalled, plump, scaly leaf, in the shape of an ingot or a rhomboid, with a length of 2-4cm, a height of 1-2.5cm and a thickness of 0.6-1.5 cm; The outer surface is white to yellowish white with light brown spots, and the inner surface is white to yellowish white. It is better to have thick scales, solid quality, full powder and white cross section.