PLATE 25 



A. Gymnadenia albida Rich. Les Plans, Switzerland, July 51st, 19 12. 



I, 2. Front and side views of flower (enlarged). 



3. A flower from Yorkshire, June 15 th, 191 8 (enlarged). 



B. Platanthera bifolia Rchb. StrensaU, Yorks., July 4th, 1909. 



