ENGELMANN—DICCIOUS GRASSES. 435 
len grains of the dry anther, oes in water, globular, 
smoothish, 0.017 line in diamete 
The stalk of the female a is much shorter than the 
leaves, usually 1;—2 and very rarely 3—4 inches high; it is 
to the top, the pha ventricose, many-nerved sheaths 
= the 2 or 3 upperm t leaves serv ing as involucres for the 
wer-heads. These Thea 3—3} lines long, are usually 2 
in Lab one almost sessile between both top leaves and 
on the side of the iit itis the other on a flattened pedicel 
on the side of the upper leaf; sometimes a third head is no- 
tied still higher, and on the side of the lowest one. The 
pedicels of these heads are nothing but the common pedun- 
cle or rhachis terminating the stem, and the heads themselves 
correspond to as many lateral spikes of the male a in po- 
sition as well as in structure ; they are only more contracted, 
consist - fewer, 0 one-flowered, spikelets, and turn “obliquely 
pistillate spikelets are like the staminate ones ——y so that 
or scatte red hairs; at maturity they var entire 
fom the ‘comm — at the insertion of whieky a tuft 
dis te ot acuminate, 1 merved, carinate sae comp — 
rest spikelet only is larger with 2Qor8 re gam he 
back, epalf outside and with its lower edge united to the 
umes much lane r, the la est organ of the spike- 
rx owl concave insite, aly ovate, narrowed 
herbaceous, nerv: 
eos pods and 2 2 smaller “lateral . 
se course, 0 vosite the upper glume and 
eden Bp ple of cous opps —— catoh ama 
eth, ee two further latralme m 
