1892.] Anatomical Characters of Gramineae. 361 
of the carene, it is seen (fig. 11) that some of them are not 
surrounded by any parenchyma or mestome sheath, and that 
the leptome is well developed, the hadrome, on the contrary, 
being less differentiated. 
In regard to the parenchyma sheath, which surrounds all 
the other mestome bundles in the blade, it is seen, in trans- 
verse section, to be composed of roundish and thin-walled 
the groups of stereome. 
Mention has been made of the presence of a mestome- 
sheath in the bundles of the leaf of this species of Leersia. 
This fact has also been recorded by Schwendener * who enu- 
Merates the species of Graminez containing the sheath, 
from Distichlis, these two plants seem to have true mestome 
sheaths. That this character was not attributed to them in 
that the small mestome bundles showed a distinct interrup- 
tion of this sheath. Prof. Schwendener (#7 litteris)has aed 
eath, 
eveloped in Leersia ory- 
it he ste e€ i i tron ] d ome 
reome 1s m 
quite ) $ y he est 
Z0ides, and forms groups above and below all t 
2 
: = Mest = blaetter, p. 
TANICAL GazeTTe, August and October 1891. 
