Plate 1. — This plate, prepared by Edouard Prillieux and 

 published in 1856, is one of the earliest illustrations of mycotro- 

 phic infection. It shows the habit of the orchid, Neottia, and 

 its fungal infection in figures 7-10. In fig. 7, the outer cortical 

 cells are shown filled with a mycotrophic content ; in fig. 8, a 

 septate mycelium ; in fig. 9, a mass of yellowish matter sur- 

 rounded by hyphae; in fig. 10, young cellular tissue containing 

 pelote and intact nucleus. Further stages, and development of 

 coralloid mycorrhizome, were illustrated in Plate 18. {Repro- 

 duced from Ann. d. sci. nat. : Bot., 4 me. ser. vol. 5, pi. 17, 1856) 



