1895.] Anatomical Characters of N. Am. Graminee. 365 
L. hexandra. 
Only one small bundle above the midrib < LZ. Virginica. 
L. lenticularis. 
Sometimes no small bundle above the 
midrib . L. monandra. 
Pirchchivnaaheath chlorophyll-bearing in in 
all the mestome-bundles etd the 
= oh -ones ; L. lenticularts. 
L. oryzotdes. 
Mestome-sheath thin-walled L. Virgintca. 
L. hexandra. 
Mesophyll. 
Separated in ik by ae uncolored 
parenchyma is she Atwanare 
Colorless sisal 
Forming groups which connect the bulli- 
form cells of the ieee and inferior 
ee . L. hexandra. 
U. S. Dep't s Apricaiiive Weikicpnk aL. 
EXPLANATION OF PLATE XXVI. 
pone. of leaves of Leersia hexandra, L. lenticularis, L. Virginica 
2 
and Z. m 
Fi die xandra (North Carolina). Transverse section se the 
middle re the blade. The — part represents the mesophyll. x 75. 
. Same species Seer. . Transverse section, showing the bull 
form. See eae one ae cde gee gee dae etween two mestome- 
bundles. erior face ig. 3. ; depau- 
perata of z fetandra Hise Parke be of a hair from the inferior 
face of the blade. 
Figs. 4-6. pret atioual 
Fig. 4. Transverse section of the middle of the blade. x 75.—Fig.- 
5. Bulliform and thick-walled epidermal-cells; the last from under- 
neath a mestome-bundle. x 320.—Fig. 6. Colorless pagetzires 
from the midrib, bordering on the mestome-sheath 
bl nt ns 7: Leersia Virginica. ‘Transverse section of the middle of Oke 
ade, 
Figs. co Leersia monandra 
Fig. 8. Specimen from Te xas. Transverse section of the middle of 
the blade. Xx 75.—Fig. 9. The a mestome-bundle; /. /., the in 
ferior face, /.S., the mestome-sheath. x 320.—Fig. 10. Specimen 
from Florida. A small mestome-bundle above the midrib, surrounded 
bya mestome-sheath (AZ. S.), but only containing leptome. X 320. 
