ORCHIDACEvE 



Plate 104: Pogon'ia ophioglossoides 

 1, plant natural size, rooting base shown by 

 f. 10, drawn from a specimen collected in North 

 Easton, Massachusetts, in June 1921. 2, flower, 

 natural size, from plant shown in f. 1, viewed 

 from the side. 3, section taken from lip and col- 

 umn, made longitudinally through the centre, 

 to show the structure of the median keel, and the 

 position of the anther in relation to the clinan- 

 drium (the projection above at base of column 

 represents the base of the upper sepal) ( X 2J). 

 4, base of lip, drawn to show glands, one on 

 each side, at the base of the lip( X 5^). 5, column 

 with anther in normal position ( x 3f ). 6, up- 

 per part of column, anther turned back ( x 6f ). 

 7, ten pollen grains highly magnified. 8, seed 

 highly magnified. 9, capsule, drawn natural 

 size. 10, base of stem, showing vertical rhi- 

 zome, roots and a root-shoot at the end of 

 which may be seen a bud from which a new 

 plant is about to develop (natural size). 



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