[PENHALLOW] N. AMERICAN TAXACEiK AND CONIFERS 57 



Plate IV. ^ 



Fig. l.—Taxus hrevifoUa. Transverse section, showing the small, rounded trach- 



eids and the rather dense structure, x 55. 

 Fig. 2.—Torreya taxifolia. Transverse section, showing the rather squarish trach- 



eids and the rather open structure, x 55. 



Plate V, 



Fig. \.—Cupressxis macrocarpa. Transverse section, showing the open structure, 



the thin summer wood and the scattering resin-cells on the inner face of 



the spring wood, x 55. 

 Fig. 2.—Junipe7-)is californica utahensis. Transverse section, showing the very 



thin summer wood and the resin-cells in open bands near the summer 



wood. X 55. 



Plate YI. 



Fig. l.—Taxodium distichum. Transverse section, showing tlie large tracheids, 

 the double summer wood and the very prominent resin-cells forming a 

 tangential band through the inner zone of the summer wood, x 55. 



Fig. 2. — Sequoia sempcrvirens. Transverse section, showing the large, squarish 

 tracheids, the prominent resin-cells scattering through the spring wood, 

 and a somewhat compact row of poorly formed resin-passages along the 

 outer face of the summer wood, x .55. 



