176 REV. PROF. G. HENSLOW ON THE 
the honey-tube appears, three cords are seen isolated from the 
remaining groups. The one beyond the cavity is for the posterior 
sepal (3,s.). A little higher the circle of cords at the other end of 
the axis increases to about twenty in number (3); and while a 
certain number travel outwards for the sepals and petals, and 
stamens in part (3), the rest close up and soon form a perfect 
circle in the middle (4. Two petaline (posterior) cords now 
divide (4); one half remains petaline, the other being transferred 
to a sepal (cf. 4 and 5). Comparing figures 3, 4, and 5, it will be 
seen that when the posterior sepal was provided for, the cord had 
increased in size (2) and gave rise to three separate cords, which 
now appear on the inner side of the cavity (4). These are for 
the cords of two petaline and one sepaline stamen. The ring 
now provides for four more perfect stamens; the three filaments, 
which bear no anthers, having only an extremely minute cord or 
none, indicated by dots in fig. 5. They are the three anterior 
and petaline stamens. 
The relative positions of the anthers on maturity is in strict 
adaptation to insect fertilization. The two posterior and petaline 
face each other, 7. e. right and left of a median line, while the 
filament of the posterior and sepaline stamen is declinate, bending 
forwards and downwards so as to bring the anther into an up- 
turned position. The two pairs of sepaline stamens face each 
other in the same manner as the first pair; so that while six are 
introrse, one, the posterior sepaline, is really extorse. 
In preparing for the pistil the innermost circle consists of five 
cords (6). These become trilobed (7) and are situated opposite 
the petals (5). The central cord becomes the dorsal carpellary 
(7, 8, and 9, d.c.). Of the other two, each bifurcates (7-9); the 
innermost branches coalesce to form a somewhat crescent-shaped 
placental cord (10). The others travel outwards and coalesce 
with the corresponding branches of the neighbouring systems, 
just as already described in the other genera of this order (8, 9. 
10). The first described pairs uniting have thus formed five 
cords of double origin in front of the ovary-cells (9, 10), alter- 
nating with five others intermediate in position. These are often 
largely composed of phloém with the tracliez ultimately obscure 
(10). 
Above the ovary-cells, at the base and thicker portion of the 
style, a section shows five solid circular buttresses, the tissue of 
which is continuous with the central parenchyma, in the middle of 
