Cattle small intestine 
Bovine small intestine, obtained from the slaughterhouse and cleaned.
Characteristics
- In biodynamics it is the casing of preparation 503 (chamomile).
- It is stuffed like a sausage with dried, moistened chamomile flowers.
- The 'sausages' are buried in autumn and dug up in spring.
Role in the preparation: It serves as a natural casing while the preparation matures in the soil.
Caution: In the EU part of the bovine intestine is classed as specified risk material (Regulation (EC) 999/2001): check before sourcing it and follow animal-health rules.
Sources: Biodynamic agriculture - Wikipedia · Small intestine - Wikipedia · Regulation (EC) 999/2001 - EUR-Lex
Documentary information: this is neither a recommendation for use nor a plant-protection or veterinary claim. Check your country's regulations before any use.