Anatomy and Histochemistry of the Leaf of Rehmannia glutinosa Libosch.ex Fisch (Scrophulariaceae) Morphology and Histochemistry of the Glandular Trichomes of Isodon rubescens (Hemsley) H. Hara [Lamiaceae] Peltate glandular trichomes of Colquhounia seguinii harbor new defensive clerodane diterpenoids Correlation between histochemical location and content of artemisinin Microstructure of Glandular Trichomes on Leaf Surface of Sesame and Changes of Trichome Secretions under Drought Condition Isolation and Analysis of Differential Expressed ESTs from Stem Trichomes of Lycopersicon esculentum (Solanaceae)