Bui. 824, U. S. Dept. of Agriculture. 





Plate I. 



■/-•->- 





f U-cr-^, HV 



«^^--#' /., 





Fig. I.-"Puckered" Papill/e, Ray Fig. 2.-Marginal Papill/e, Ray Floret. 

 Floret. (x290.) (x2I0.) 



rji 



Fig. 3.— Stone Cells, Achene. 



Fig. 5.— Bract Tissues. (xl20.) 



Fig. 4.— Achene Tissues. 





Fig. 6.— Stem Tissues. (x84.) 



