158 INTRODUCTION TO BOTANY. 
The colour of the stigma ought also to be observed. 
It is sometimes difficult to distinguish between the style 
and the stigma, especially when the stigma is lateral as in 
colutea. 
GYNOSTEMIUM. 
Column, Columna, Pistillum antheriferum. 4 sexual organ 
formed by the union of those of the two sexes into one co- 
lumnar mass. PI. 12, fig. 2, 3, 4, 6, and 8. 
‘ 
Parts. 
Filaments, Synema. The part that appears to support 
the male organs. 
Stigma, Gynizus. The moist and viscous surface of the 
female organ. PI. 12, fig.2a; 4b; 6c; 8d. 
Rostellum. An elongation of the stigma above the 
gynizus, frequently covering it. Pi. 12, fig. 6 e. 
Caudicle, Caudicula. The pedicell, or solid filament, 
that carries the pollen masses. PI. 12, fig. 1 b3; 5 a. 
Retinacle, Retinaculum. 'The globular, viscous body to 
which the caudicles are attached, and by which the pollen 
masses are connected together. PI. 12, fig.1 a; 5 b. 
Clinandrum. ‘The cavity in the upper part of the gym- 
nostemium above or behind the gynizus, in which the an- 
thers or pollen masses are lodged. PI. 12, fig.2,e; 4 f. 
Locellus. ‘The particular cavity in which each anther or 
pollen mass is lodged. PI. 12, fig. 2 e. 
Pollen mass, Anther Linnzeus, Massa pollinica, Anthera. 
The whole mass of pollen, or naked anther. Pl. 12. 
fig.l c,d; 2e; 4f. 
Massula. ‘The two separate pieces of which each pollen 
mass is composed in some genera. Pl. 12, fig. 9 and 10. 
Septulum. 'The division between the two locelli. Pl. 12, 
fig. 2 f; 4g. { 
Proscolla. The glandular swelling at the top or middle 
of the rostellum, secreting a viscous humour, which enables 
the pollen masses to slide down, when the clinandrium 
opens. PI. 12, fig.2 c; 5b. 
Staminodium. Appendages which appear to be abortive 
anthers. Pl. 12, fig. 2d; 3e; 4e;6f¢g. 
Bursicle, Bursicula. The end of the rostellum forming 
a hollow in which the retinacle nestles. Pl. 12, fig. 2b; 4a. 
As this construction is found only in the orchideze, it 1s 
needless to mention the several variations; the principal 
