ORCHIDACE.E 



Plate 107 : Isotria affinis 

 1, 2, 11 and 12, plant and root system, drawn 

 natural size from material collected by Earle 

 Jerome Grimes, near Williamsburg, Virginia, in 

 May 1921. 3, lateral sepal ( X 3). 4, upper sepal 

 ( X 3). 5, petal ( x 3). 6, lip, one half removed, 

 drawn to show calli ( X 4). 7, lip spread out, 

 drawn to show lateral lobes and calli ( x 4). 8, 

 summit of column showing stigma, anther 

 turned back, pollen removed. 9, column with 

 anther in normal position. 10, pollen tetrad 

 highly magnified. 



[36] 



