1438 
the stigma protrudes. In _Jouvea pilosa this glume is grown to the 
rachis or rachilla for nearly its entire length, the free portion be- 
ing a short narrow tube as illustrated on page 228, Bull. Torr. 
Club, Vol. 17: and in fig. 2, pl. 106. This glume is very firm and 
rigid, the texture of the dorsal portion being like that of the axis 
which bears it. It immediately subtends the pistil, which in 
Jouvea pilosa has no palea, but which in /Jouvea straminea has a 
very delicate, hyaline, 2-keeled palea between it and the main 
axis. In many of the specimens examined there was above this 
palea a second pistil, imperfectly developed, enclosed within a sac 
of delicate texture, but otherwise formed like the sac which en- 
closes the perfectly developed flower. This second and imper- 
fectly formed pistil is raised above the other on a very short stalk, 
and the details of the structure here described are shown in fg. ¢, 
pl. 266. The presente and position of the second pistil in the 
cavity containing the female flower certainly suggests the idea 
that the organ here designated as a spikelet is really a branch 
bearing two or four I to 2-flowered female spikelets, which are 
subtended by and enclosed within a single glume, or entire and 
leafless blade-sheath. 
JOUVEA sTRAMINEA Fourn. Bull. Soc. Bot. Belg. 15: 475. Not 
Scribner. Liebmann, no. 738. 
Found ‘by Dr. Palmer (no. 443) in February, 1895, growing in 
large masses at the edge of a low damp place ina garden near 
the river bank at Acapulco. The plant produces long runners. 
There is a little uncertainty as to the staminate plants of the true 
Jouvea straminea. Dr. Palmer assures me, however, that the stami- 
nate specimens which he gathered were collected in the same 
locality as the female plants and were found growing with them. 
The staminate plants are more slender, with rather longer and less 
rigid leaves than those which are undoubtedly the male plants of 
Jouvea pilosa. There is little difference, however, to be noted be- 
tween the spikelets of the two. 
JOUVEA PILOSA n. n. ao 
Jouvea straminea Scribn. not Fourn. Rachidospermum Mexi- oe 
canum Vasey. Bot. Gaz. 15: 110. Uniola pungens Rupr. in Bull. oe | 
Acad. Roy. Brux. g: excluding the eynony at. eas, city pee 
