POWDERED DRUGS AND FOODS. 703 



B. In monoclinic prisms. — Continued. 



b. Only non-glandular hairs present. 



Characteristic stone cells 16. Cardamomum (Ceylon) 



Crystal fibers 17. Hamamelidis Folia 



Fragments reddish with alkalies 18. Senna 



Non-glandular hairs few 19. Uva Ursi 



c. Glandular and non-glandular hairs wanting. 



Epidermal cells with papillae 20. Coca 



Few fragments of tissues 21. Guaiacum 



Few crystal fibers and non-glandular hairs. . . .22. Uva Ursi 



C. In crystal fibers. 



Rosette-shaped crystals numerous 23. Granatum 



Crystal fibers few 24. Uva Ursi 



D. In cryptocrystalline crystals. 



a. With hairs. 



Hairs few 25. Belladonnae Folia 



Non-glandular hairs numerous 26. Tabacum 



Starch grains 10 to 35 m 27. Solanum Carolinense 



b. Hairs few or wanting. 



Starch grains 5 to 7 /* 28. Dulcamara 



II. Calcium Oxalate Crystals wanting. 



A. Cystoliths of calcium carbonate present. 



Glandular and non-glandular hairs 29. Cannabis Indica 



Stone cells characteristic ; 30. Ruellia 



B. Calcium carbonate wanting. 



a. Glandular and non-glandular hairs present. 



a Fragments of pappus present. 



Pollen grains 10 to 20 /* 31. Eupatorium 



Pollen grains about 25 1" 32. Grindelia 



/3 Fragments of pappus wanting. 



1. Glandular hairs with i- and 2-celled heads. 



Non-glandular hairs characteristic. .. .33. Digitalis 



2. Glandular hairs with i- to 8-ceIIed head. 



Odor characteristic 34. Hedeoma 



Non-glandular hairs twisted 35. Marrubium 



Non-glandular hairs i- to S-celled. 



36. Mentha Piperita 

 Non-glandular hairs i- to 3-celled. .37. Scutellaria 

 Non-glandular hairs parallel with surface of leaf. 



38. Salvia 



