1914] DE VRIES— OENOTHERA LAMARCKIANA 361 



Plate XIX 



Oenothera Lamarckiana Ser. in the "Herbier de I'Amerique septentrionale'' 

 of Andre Michaux, collected about 1800 in the eastern parts of the United 

 States: A, top of spike photographed and reproduced about natural size; 

 B and C, the whole specimen of Michaux, consisting of two parts, reduced 

 about one-half; all three figures photographed for me by Dr. L. Blaringhem; 

 in the reproduction the narrow bands of paper used to fix the specimen to its 

 sheet and seen on the photographs have been omitted. 



