76 MICROSCOPICAL RESEARCH 



PLATE III. 



STEM STETJOTUEE. 



Fig. 7. Transverse section through young Stem of Bean. 'Vicia 

 f aba ' X 35 dia. Stained with Borax Carmine and Malachite 

 Green. Fixed in the Chromo-Acetic solution. 1. Primary- 

 ground tissue. 2. Cambiform tissue. 3. Phloem. 4. Xylem 

 elements. 5. Pith. 6. Traces to first leaf. The line of cut 

 being immediately below the first leaves. 



Fig. 8. Transverse section. Stem of Buttercup. 'Eanunculus 

 acris ' x 18 dia. Fixed in 92% Alcohol. Stained with Borax 

 Carmine and Malachite Green. 1. Cortical tissue. 2. phloem 

 elements. 3. Xylem elements. 4. Central hollow cavity of 

 stem. 5. Primary ground tissue. 6. Primary vascular 

 bundles. 7. Leaf trace bundle. 8. Cambium. 



Fig. 9. Transverse section. Stem of Wound-wort. ' Stachys 

 sylvatica ' x 20 dia. Fixed in 92% Alcohol. Stained with 

 Picro-carminate of Ammonia. 1. Cortical tissue. 2. Cam- 

 bium. 3. Xylem elements. 4. Primary xylem bundles. 

 5. Primary ground tissue. 



Fig. 10. Transverse section. Stem of Tamus. 'Tamus communis' 

 X 25 dia. Fixed in 92% alcohol. Stained with Borax 

 Carmine and Malachite.Green. 1. Cortical tissue. 2. Scleren- 

 chymatous ring. 3. Xylem elements. 4. Primary ground 

 tissue. 5. Central cavity of stem. 



