402 BOTANICAL GAZETTE [MAY 
strictly comparable instances for comparison with the figures just 
given and found 4.514 cm., that is, a little broader and shorter 
than ovata. The spike is destitute of red color, or almost so, in all 
its parts, and this is often the most striking mark. The flower buds 
are pale and stand off at wide angles from the axis. The flowers 
are large and the petals have usually a broad base, as in O. La- 
marckiana. The stems are not as stout nor as richly branched as 
in ovata, but this is probably due to the less amount of chlorophyll. . 
The fruits are like those of the other type. 
O. hybr. brunnea is a very striking form, especially when culti- 
vated in large numbers of the second generation, which is uniform. 
It is as high as ovata, but less stout; its branches are more erect, 
its flowers and fruits erect and almost pressed against the stem. 
The leaves are smooth and narrow, measuring approximately 
1.58.5 cm. (as compared with 4X17 and 4.5 X14 in the two 
others) and the stem and foliage are brownish, contrasting sharply 
with the two other types. Even in early youth the differences are 
sharp enough, although some individuals may remain doubtful, | 
especially when the space at their disposition is not sufficient, but 
the flowering spikes make all doubts disappear. 
O. hybr. mut. contraria resembles the brunnea, but has larger 
leaves, measuring approximately 2.5 X10 cm., and the color is less 
brown. The flower buds are thinner and yellowish. It looks like 
a different combination of the marks of the triple hybrids. Perhaps 
it is related to O. Lamarckiana mut. oblonga. 
O. hybr. mut. gigas.—This occurred in the first generation of a 
cross between O. lorea and O. Lamarckiana, and in another between 
O. grandiflora and O. nanella. Both were recognized by their broad 
flower buds, resembling those of O. Lamarckiana gigas. The first 
was a stout plant 1.5 m. high, but little branched, with broad and 
thick leaves, a short and thick calyx tube, and short and thick 
fruits. In its other marks it belonged to the type ovata. Its pollen 
consisted almost entirely of quadrangular grains, which were almost 
completely fertile. Moreover, it was fertile after self-fertilization. 
Its seeds contained 89 germs in 100 grains. Evidently it was 4 
gigas and not a semigigas. The other mutant was a /utea with 
thick flower buds. It produced with its own pollen only one fertile 
