9 
lated below the empty glumes, the spikelets falling from 
the pedicels entire, either singly, in groups, or together 
with the joints of an articulate rachis. The first six 
tribes belong to this series. 
This first grand division of the order Graminee is 
based upon two characters in combination, the articu- 
lation of the pedicels just below the spikelets or cluster 
of spikelets and the single perfect flower, which may or 
may not have a staminate or imperfect flower below it. 
There are never more than four glumes in the spikelets, 
the first three being empty or the third with a rudi- 
mentary or staminate flower in its axil; the fourth 
glume subtends the perfect or hermaphrodite flower. 
In a few genera the spikelets are reduced to two or 
even only one glume, but in these cases the articulation 
of the spikelet with the pedicel below the outer glume 
indicates its connection with this series. . 
KEY TO THE TRIBES IN SERIES PANICACEZ. 
I, oe usually much compressed laterally, cpa gre empty 
ne or rudimentary; flowers s nate, pistillate, 
or drenaearsc ns ea eee Tribe VI. oryzex. ” (Bee page 43.) 
1, Spikelets not compressed laterally, somewhat dorsally com- 
presse ne r terete; empty glumes two or three (one only in 
Reimaria) 
2 pada glumes hyaline, empty glumes membranaceous to 
eous, the lowest the largest, its edges embracing the 
others) a ere of the eS usually pecolates: (contin- 
uous in Jmperata and Miscanthus) 3 
2. Flowering glumes membranaceous to coriaceous, usually firmer 
in texture than the empty glumes, axis of the inflorescence 
continuous, not breaking up at maturity 4 
3. Spikelets either staminate or pistillate, each in a separate inflo- 
cence on sy same plant, « or in distinct parts of the same 
inflorescence ...........- . MAYDEE. (See page 10.) 
3. Spikelets ihc all hermaphrodite c or hermaphrodite saat stam- 
inate, regularly arranged and usually in pairs, one sessile the 
other pedicellate in the same inflorescence (both pedicellate 
in Trach: iia .. Tribe Il. anpRopoGoNEx. ase page 15.) 
