Orchidacecz 



i8i 



Taking a flower which has but recently expanded, push 

 gently a sharpened pencil into the spur. It is found that on 

 touching the rostellum its pouch-like membrane is pushed down, 



III. 



Fig. 3I4-— I. Aceras anthrofophora (Man Orchis), whole plant. II. Flower of an 

 Orchid loolced at in front, the ovary being concealed ; l, p, anther lobes, each contain- 

 ing a pollinium : sT, stigma; R, rostellum. III. Gynoste^ium of Cy/w^^rfzVw;/, seen- 

 laterally ; above to the right the anther, to the left the stigma. IV. Pollinia of an 

 Orchid, with their pedicels united by the rostellum. V. Burst capsule. VI. Trans- 

 verse section of an ovary. 



