446 Annals of the Carnegie Museum. 



Explanation of Plate XXXIII. 



Fig. a. Rosette-leaves of Lactuca spicata var. aurea. One-fourth natural 

 size. 

 . Fig. B. Stem and leaves of L. spicata var. aurea. One-fourth natural size. 



Fig. C. Branch of inflorescence of same, plant. One-fourth natural size. 



Fig. D. Stem-leaves from lower part of stem of a smaller plant than was 

 drawn in fig. B. One-fourth natural size. 



Fig. E. Head of L. spicata var. aurea with ripe achenes. Three and one- 

 half times natural size. 



Fig. F. Ripe achene from head in fig. E, drawn at same scale. 



Figs. G and H. Stem-leaves from plants of L. spicata var. aurea forma 

 integrifolia. One-fourth natural size. 



(All figures were drawn from specimens collected in Pittsburgh, Pennsylvania, 

 Oct. 2, 1905, by O. E. Jennings and Grace E. Kinzer.) 



