136 
The calyx expands before the seed is quite ripe, (vide Davies 
Welsh Bot. contra.) Davies is correct in saying, “ that the 
upper floret ripens first, and the next in succession, and that 
the seed falls along with the surrounding corolla,” whose ex- 
ternal glume is much the larger, very abrupt, so as to be 
truncate and fringed at the extremity. Stigmas much shorter 
than the filaments. No nectary discoverable. oe 
Several stems arise from the same root; sometimes they 
form a rather dense tuft. 
27. Holcus lanatus and mollis.—' The acute calyx-glumes, 
and the downy joints of the stem readily distinguish the latter 
species, without attending to the awn of the upper floret, 
which is apt to ale: if the plants be examined in the 
flowering state. 
28. Melica uniflora.—Cheshire, May 16, 1827.—' The nec- 
tary is peculiar, consisting of a thick, laterally inflexed, blunt, 
undivided scale. Filaments much thickened at the base. 
Styles horizontally spreading. Stigmas with many-branched 
divisions. The inner valve of the corolla has its edges 
strongly inflexed. Sheaths of the stem angular, the lower - 
one rough. Stems bent at the base. The thickened bases 
of the filaments are permanent, and may have been mistaken for 
nectaries. "Chis peculiarity I believe is observable also in the 
M. nutans, but am uncertain whether it exists in M. ewrulea. 
.99. Glyceria rigida.— Beamaris, Anglesea, June 2, 1828, 
(Walls.)—' This grass much resembles Triticum loliaceum, 
which is found with it. The germen, stigmas, and mectaries 
are alike in both. Outer valve of corolla more obtuse in 
Triticum loliaceum than in this, which has a slight rough keel 
at the top: leaves not much different in the two, but in GIy- 
ceria rigida the stipule is rather longer, the spikelet narrower» 
and more decidedly stalked, the calyz-glumes shorter, and the 
florets less crowded. , - 
30. Poa glauca.—Twll dá, N. Wales, July, MT j 
taries deeply and vider notched, or rather cloven into tWO - 
qua. segments. Stigmas not very large or. evidently 
branched : the edge of the inner valve of the corolla scarcely 
