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118 BOTANICAL GAZETTE [AUGUST 
with the lobes of the corolla scarcely expanding and the large 
anthers scarcely protruding. Several days later, when the stig- 
mas were beginning to shrivel, the corolla was slightly expanded 
(fig. 21). The anthers are large, but there is marked inequality 
in size of the 2 pairs. The pair next to the insertion of the fila- 
ment is uniformly the larger and overlaps somewhat the smaller 
pair, so that in face view an anther appears as in fig. 22. De- 
hiscence is somewhat irregular and is confined to the apex, so that 
few spores are shed. The anthers persist until all the flowers 
in a spike bloom. In old anthers the microspores are dry and 
shriveled, but in fresh anthers they are mostly of large size and 
appear to be normal; but no germination was obtained in cul- 
tures. 
No. 23 (figs. 23, 24).—A plant with short crinkled filaments 
and extremely narrow and pale green anthers. Most anthers 
dehisce fully. Very few microspores are plump and have gran- 
ular contents. The range of size of grains is quite as for the 
first form, but no germination was obtained in cultures. : 
No. 25 (figs. 25-27).—This plant resembles a second form her- 
maphrodite. The stamens, however, are decidedly shorter, the 
anthers are somewhat of the same shape but dehisce regularly, 
and the microspores range to a larger size quite as for the first 
form. About 20 per cent of the pollen grains tested germinated, 
but in all cases the tubes made only a very feeble growth. ° 
No. 28 (figs. 28, 29).—The stamens produced by this plant 
have short and crinkled filaments with decidedly green anthers. | 
The apical half of the anthers is composed of a sterile green blade, 
and the anther sacs are much reduced in size and are not de- 
hiscent. At least 75 per cent of the pollen grains that are produced 
are of large size and are plump with granular contents. In 3 
cultures of pollen removed from fully developed anthers 6 grains 
germinated and the best developed tube was 0.60 mm. in length. 
No. 30 (figs. 30, 31).—In general appearance the stamens 
produced by this plant resemble those of the second form; the 
anthers are greenish yellow but the filaments are shorter. There 
is a marked peculiarity, however, in the development of anther 
sacs not observed thus far on any other plant. When anthers 
