110 DEVELOPMENT OF THE FLOWER. 
and which passes completely round the cell, then up into 
the style, in which it becomes the centre of 3, the compound 
placental vessels use divided?? P]. 28.—Fig. 2. d, d, 
d, etc. 
The iieii to this is the fact of the trasa vessels 
being given off from the main vessel below the lowest points 
of the placentæ. 
But Ochnaceæ, List Boragineze must sgain be exa- 
mined. | 
Swertia. Pl. 32.—Fig. 1. 
The corolla of this is nearly polypetalous, indeed the 
stamina appear to be the chief bond of union, rather than 
the adhesion of the lacinie themselves, the sinuses are 
evascular, e. e. normal carpella, f. f. additional ditto, its op- 
posite one removed, g. solid substance serving as a base for 
the additional carpella. 
Fig. a. c. normal carpella, b. two additional ones of outer 
series, both empty! d. d. four additional ones of inner series, 
ovuliferous. 
The above sketches shew a great tendency both to the 
production of several carpella, as well as to their being 
arranged in a double series, of this c. is an instance. The 
ovule even of the most imperfect are a good deal developed 
as shewn, c. a. 
The additional carpella are variable in situation, and very 
frequently they are not on the same plane. 
[? Orchideæ. Pl. 32.—Figs. 2 and 3. 
The order of development is as follows :— 
Sepals. 
Petals. 
Fertile stamina. 
Barren stamina, (2). 
Stigmata of which the posticeous appears first. 
Fig. III. The labellum is quite simple up to a late period, 
and parts hypogynous. The barren stamina belong to another 
series, because developed at a different period. The largest 
stigma is developed first, a. Fig. 2 anther ; b. barren stimina ; 
c. largest stigma, or disc of the three. 
