Page 418 - Applied Pharmacognosy

Types of Chemical markers

Less than 15 μm Starch Rio Ipecac
μm 22 – 17 Starch Cartagena Ipecac

Less than 8 μm Starch Cinnamon bark
Less than 30 μm Width of fibers
Cassia bark
more than 10 μm Starch
μm 40 – 30 Width of fibers Rauwolfia serpentina (gen.)
Rauwolfia vomitoria
Up to 57 μm Width of vessel (African Rauwolfia)
Up to 150 μm Width of vessel