574 IOWA ACADEMY OF SCIENCE 



TUMION TAXIFOLIUM Green, Torreya. Stinking Cedar. 

 Leaves very broad and flat. V/2 inches long, edges tending down. 



Resin duet 1, large, ventral, central, below vascular bundle but 

 not touching epidermis. Lined by several irregular concentric 

 layers of cells. 



Vascular bundle single, not enclosed in a sheath. Xylem bundle 

 thin and crescent shaped, often a few strengthening fibers 

 present at sides of phloem. 



Hypodermal cells not present. 



Epidermis shallow, heavy walled and lignified, lower epidermal 

 cells slightly mammillated. 



Stomata borne in 2 broad, shallow grooves on ventral side of 

 leaf, one groove each side of midrib. Stomata flanked by long 

 forked pillars, guard cells lignified. 



Palisade parenchyma not very deep, composed of broader shal- 

 lower cells than Tumion californicum. 



Material from Tallahasse, Florida. 



Plate LXV. 



Figure 1. — Section of leaf of Tumion taxifolium. 



Figure 2. — Section through a ventral groove, on leaf of T. 



taxifolium, showing stomata and pillar-like cells. 



Figure 2'. — Section through epidermis of leaf of T. taxi- 

 folium. 



Figure 4. — Section through vascular cylinder and resin duct 

 of leaf of T. taxifolium. 



