252 jj = EXPLANATION OF THE PLATES. | 
PLATE THE TWELFTH. 
Flowers of the Orchidece and Graminee. 
Fig. 1. Orchis. 
a. Retinacle. 
b. Caudicle. 
¢. Pollen mass. 
d. Pollen mass cut off transversely to show the ‘septu- 
lum, cells, and grains, of which it is composed. 
Fig. 2. Orchis. 
a. Gynizus, 
b. Bursicle. 
ce. Proscolla. 
d. Staminodia, or imperfect anthers. 
e. Clinandra filled with the pollen masses. 
f- Septulum. 
Fig. 3. Cypripedium. 
a. Gynostemium. 
£. Supports of the anthers. 
c. Anthers. * 
d. Gynizus. 
e. Staminodium. 
Fig. 4. Nigritella. 
a. Bursicle and rostella. 
b. Gynizi. 
c. Bursicle cut open. 
d. Retinacles. 
e. Staminodia. 
J Pollen masses in the clinandra. 
g. Septulum. 
Fig. 5. Loroglossum. 
a. Caudicles. 
b. Proscolla seated on the rostellum. 
Fig. 6. Liparis. 
a. Lower lip turned down, and part cut off 
b. Gynostemium. 
c. Gynizus. 
d. Winged edges of the gynostemium. 
e. Clinandrium. 
Jf and g. Staminodia. 
h. Anther. 
2 Pollen masses. 
Fig. 7. Liparis. The solid pollen mass. 
