THE STRUCTURE OF CERTAIN NEW HYBRIDS. 151 
Occasionally in the hybrid, and in both its parents, the flowers borne 
at two consecutive nodes open simultaneously. 
The bracts of B. (fig. 59, br) are cordate, acute, crenate, 1 to 1} in. 
long. 
In C. (fig. 61) the bracts are large, ovate-cordate, bluntly rounded 
or subacute, entire or very indistinctly crenulate, 1 to 14 in. long and 
~ to 1 in. wide. 
In M.W. (fig. 60) they are large, ovate-cordate, acute, faintly serrate, 
1} to 12 in. long, 1 to 1} in. wide. 
SEPALS. 
The sepals of B. are oblong, 12 to 14 in. long, 1 to 1} in. wide at 
base, the rounded apex extending # to } in. beyond the short or almost 
obsolete dorsal mucro. The two outermost sepals are green on the lower 
surface; the third pink along one margin; the inner two pink on both 
margins; the upper surface of all is reddish-crimson. 
In C. the sepals are oblong, slightly keeled, about 1} in. in length, 
with an arista of ,°, in. tapering from a vertically expanded base, and 
rising ,}, in. from the apex of the sepal. The upper surface is dull 
white, with a very faint bluish tinge; the under surface a general light 
green. 
The sepals of M.W. are 2 in. long, and bear a green arista about } in. 
long, | im. from the end. The upper side of the sepals is a clear lilac 
rose, shading off to nearly white at the centre. The colour of the under 
side is distributed as in B.; the shade, however, is pinkish-purple. 
PETALS. 
The petals of b. are 2 in. long, } to 2 in. wide; pink on the under 
surface and crimson above. The spread of the flower is 44 to 5 in. . 
The petals and sepals in the fully expanded flower may fall back until 
they form an angle with the floral axis a few degrees greater than a 
right angle. 
The petals of C. are slightly longer and narrower than the sepals ; 
white, faintly tinged with blue. The diameter of the flower is 35 to 4 in. 
In strong sunshine, especially when indoors, the perianth bends back a 
very considerable distance. 
In M.W. the petals are also longer and narrower than the sepals, the 
upper side a uniform lilac rose, the under side a lighter shade of the 
Same; more or less pouched at the apex. The diameter of the flower is 
47 in. when measured from a petal to a sepal opposite, or 53 in. when 
from nearly opposite petals. The petals and sepals may spread out until 
at 90° with the axis, but they usually lie at a somewhat less angle. 
CoRONA. 
In the corona of B. the outer faucial rays (fig. 62, a) are in two 
whorls ; the rays of equal length ; the average number ninety-three (fifty 
in outer and forty-three in inner whorl) ; 2} in. long; rigid and slightly 
curved; wavy and delicate at the outer extremity; white at the base, 
and conspicuously coloured by five or six alternating bands of white and 
