“A 
me” PROCEEDINGS OF THE NATLONAL MUSEUM. 403 
Fig. 4, Proliferous spikelet from the base of the inflorescence, showing the two 
empty glumes, the two flowering glumes of the neutral flowers, which are 
here separated from each other and situated on an elongated rhachis. The 
apex of the rhachis bears a very rudimentary spikelet; the perfect flower 
is here represented by two small scales (flowering glume and palet) and a 
very rudimentary pistil with two stigmas. c¢. 4 natural size. 
Fig. 5. Branch with four spikelets fiom another inflorescence. c¢. 4 X natural size. 
Fig. 6. Spikelet b of the preceding figure, showing the empty glumes, tre flowering 
glumes of two neutral flowers, and a strongly clongated rhachis, which 
bears, a little below its apex, a rudimentary flower. c. 4 * natural size. 
Fig. 7. The upper part of the rhachis of the preceding spikelet, showing the dis- 
tinct, pointed apex of the rhachis, and a lateral flower, consisting of one 
stamen and one stigma; the palet is absent, but the flower is supported by 
a flowering glume with long awn. ¢.15 X natural size. 
Fig. 8. Spikelet ¢ from the inflorescence, shown in Fig. 5. The empty glumes have 
been removed to show the other parts more distinctly. There are here 
three distinet flowering glumes of about the same size and shape; the two 
lowest belong to the two neutral flowers, but of which the one at the right 
side in the figure encloses a palet. The rhachis is slightly elongated, and 
bears a third flowering glime, which also includes a palet and a rudi- 
mentary pistil, but no stamens. The rhachis is extended a little above 
the base of the uppermost flowering glume and is sharply pointed. This 
figure shows the lateral position of the perfect flower. c.4 X natural size. 
Fig. 9. Spikelet d of the inflorescence in Fig. 5. There is here, besides the two 
empty glumes, only one flowering glume of the neutral flowers; the other 
one is entirely wanting. The perfect flower has the flowering glume and 
the palet of the same shape as in normal spikelets, but only one stamen 
and no pistil. ¢.4 x natural size. Fi 
Fig. 10. Spikelet from another inflorescence with but one flowering glume inside 
the pair of empty glhimes. c.4 x natural size. 
Fig. 11. An abnormally developed flowering glume of a neutral flower, showing at 
its apex a long, bent awn and two glumaceous, awned appendages. c¢. 4 X 
natural size. 
Fig. 12. A truly viviparous spikelet with normal empty glumes, while the other 
glumes have been transformed into green leaves. c. 4 X natural size. 
