L 
356 
some cases there appears to be a tendency for the upper flowers 
of the spike to be male only. Much further work is required 
in the examination of living specimens. ; 
The lobes or teeth of the perianth have been described by 
cr 
Qu 
z 
® 
ct 
o 
e 
of the testa in the rough-seeded species seems to be f 
shortening and contraction of the cells towards the back o 
he seed. 
membranous to thick and spon y he pericarp varies still 
hardened rhachis (Pachycornia). In Arthrocnemum and 
Salicornia both perianth and ricarp usually open at the 
base before they fall from the spike, and the seed escapes 12 
this manner. In Tecticornia the perianth splits into 2 
base of the delicate pericarp. In Pachycornia the spike doubt- 
__ les falls to the ground, and sun and moisture in time split 
pr open the bony axis and release the seed. 
