312 THE VEGETABLE WORLD. 
is continued by a sort of greenish appendage, with six longitudinal 
ribs, much twisted when the flower is about to expand. This is the 
Fig. 361.—Floral Envelope. 
ovarium, which, as we see, is 
inferior. This ovarium pre- 
sents one single cell, and en- 
closes a great number of very 
small ovules inserted upon 
three placenta attached to the 
internal walls of the ovary. 
The fruit is capsular, and opens 
by three valves, which bear the 
_placente in their axis, whilst 
the midribs remain in their 
place, united at the base as well 
as at the summit. Let us now 
examine the organs of vegeta- 
tion in the sameplant. The 
which are under cm ground consist of two unequal tubers (Fig. 362), 
Fig. 362.—Tubers and Rootlets, 
oe In some other indigenous species— Orchis latifolia, for instance—* 
one of which is 
of sap, whilst the other is 
whiter, larger, and much 
firmer. The substance of 
the first, in short, has bee 
‘exhausted in the develop- 
ment of ‘the aerial stem» 
which now bears its bunches 
of flowers; whilst the other 
is reserved for the develop- 
ment of the ydung leafy = 
branch in the followingye 
These two tubers, which are ee 
ovoid or egg-shaped, are the — 
nutritive roots, APO? 
these roots is another ies 
shoot,which will not be uNy — 
developed till tvoyurslate . 
soft, and apparently develd a 
