510 MR. SPENCER LE M. MOORE—PHANEROGAMIC BOTANY 
view, according to which Diplachne and Leptochloa should be closely associated, seems 
to me to be the correct one. 
The simply spicate inflorescence of Diplachne, with its bilobed lower valvule (flowering 
glume), not to mention other points, at once distinguishes it from Pogochloa, while 
Leptochloa, along with much the same type of inflorescence, has much smaller spikelets, 
l-nerved glumes, and the lower valvule at most aristulate, and never ending, as does 
that of Pogochloa, in an awn longer than itself. Uralepis scarcely differs from Leptochloa, 
except that the lateral veins of its lower valvule run each into a mucro or small tooth. 
Some years ago Grisebach (Pl. Lorentz. p. 211) described an Argentine grass under 
the name of Tricuspis latifolia, making for it a new section of ZTricuspis ($ Neuro- 
blepharum), but this, although with many points of resemblance to Leptochloa in respect 
of the structure of its spikelets, differs from it in possessing a truly Festucaceous 
inflorescence. 
The peculiar points about Pogochloa are :— 
1. The spikelets much larger than those of Diplachne and Leptochloa. 
ii. The several-nerved glumes, the lower glume having up to five, the upper often 
as many as nine strong nerves. 
ii. The long awns of the flowering glumes. 
In the structure of its leaf (Tab. XX XIX. fig. 14) Pogochloa conforms to that type which 
is known by the presence of chlorophyll in all, or at least almost all, of its parenchyme- 
cells. As seen in transverse section, the structure varies considerably, but all the larger 
bundles of sections examined by me agree in this,—that a row of sclerenchyme is 
interposed between the xylem and the phloém, while the smaller bundles are without 
this. The vessels have not the V-shaped arrangement. Immediately surrounding the 
sclerenchyme is a bundle-sheath consisting of a few large chlorophyll-cells, outside which 
lies a mass of small chlorophyll parenchyme elements. Midway between the vascular 
bundles on the upper side of the leaf is a shallow depression, beneath which is a group 
of large cells without chlorophyll. The arrangement of these cells varies according to 
the section; frequently three cells are to be seen, one central, with another on each 
flank ; more rarely the arrangement is as shown in the figure. The shaded cells in this 
figure, it should be added, represent the chlorophyll parenchyme. 
Along the broader side of the caryopsis there is a narrow chamber, not seen, however, 
until removal of the outer portion of the testa by which it is overlain (fig. 15 a.). The 
wall of the fruit is made up of five layers of small cells, beneath which is a single layer 
of large cells containing a red fluid; these large cells form the bounding-walls of the 
above-named chamber (fig. 15 5). The gluten-layer (g/.) is of a single row of very small 
cells, and beneath it lies the starch parenchyme. : 
ERAGROSTIS ARTICULATA, Nees, Agrost. Bras. p. 502. 
Hab. Reperi ad Santa Cruz mens. Dec. (N. 759.) [Bras. Or., Goyaz.] 
ERAGROSTIS REPTANS, Nees, Agrost. Bras. p. 514. 
. Hab. Crescit ad Santa Cruz, ubi mens. Nov. floret. (N. 602.) [Per Americam late 
