Download PDF

158 INTRODUCTION TO BOTANY.
The colour of the stis;ma ouoht 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. A sexual organ
formed hy the union of those of the two sexes into one columnar
mass. PI. 12, fig. 2, S, 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. PL 12, fig. 2 a; 4- b ; 6 c; 8 d.
Rosiellum. An elongation of the stigma above the
gynizus, frequently covering it. PJ. 12, fig. 6 e.
Caudicle, Caudicula. The pedicell, or solid filament,
that carries the pollen masses. PI. 12, fig. 1 b ; 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. la; 5 b.
Clmandrum. The cavity in the upper part of the gymnostemium
above or behind the gynizus, in which the anthers
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 Linnaeus, Massa pollinica, Anthera,
The whole mass of pollen, or naked anther. PI. 12.
fig. 1 c, d ; 2 e ; 4 f.
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 ; 4 g.
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. PL 12, fig. 2 c; 5 b.
Staminodium. Appendages which appear to be abortive
anthers. PI. 12, fig.2 d; 3 e; 4 e; 6 f g.
Bursicle, Bursiada. The end of the rostellum forming
a hollow in which the retinacle nestles. PL 12, fig. 2b; 4 a.
As this construction is found only in the orchideas, it is
needless to mention the several variations ; the principal
.