PLATE 2 



1. Thelymitra venosa R. Br. Flowers delicate blue. From Introduction 

 to the Study of S. Australian Orchids, by Dr R. S. Rogers, M.A. 



2. Ophrys arachnitiformis Grenier and Phillippe. Single flower en- 

 larged, typical form. Hyeres, France, March 3rd, 1920. 



3. Ophrys arachnitiformis. Peloric form. Hyeres, April 4th, 1926. 



4. Column of a species of Isochilus (enlarged), with five anthers and 

 a filament {]ourn. Linn. Soc. 'Rot. vol. viir, 1865, PL IX, %. 18). 



5. Ophrys arachnitiformis. Column with three anthers and three 

 rostellar pouches (enlarged). Hyeres, March 21st, 1920. 



6. Apostasia nuda R. Br. Forcibly opened bud (x 10). 



7. The same, sepals and petals removed, and one anther pulled back, 

 showing style with three stigmas at tip, in groove of opposite 

 anther (x 20). A, A, anthers; S, style; St., stigmas. Both from 

 Bauer's Illustrations of Orchidaceous Plants, Table XV. 



8. Cephalanthera grandiflora (L.) Bab., with three perfect anthers 

 {A, A, A). Table XX, fig. 19 of the same work ( x 6). 



