in the Bromes and their Brown Rust . 249 
species, all sown at the same time on moist filter-paper in 
glass dishes, and kept side by side, also very little difference 
can be seen between them except in minute points, as is 
evident on comparing the ripe ‘ seed ’ and the seedlings on 
the fourth day. 
Seedlings in pots, also treated exactly alike, gave the 
following points, which, as before, I append to notes on the 
species as here understood. 
B. arvensis , L. 
Is common in Europe, the Orient, and North Asia, and 
has spread to the Cape and elsewhere. It often gives the 
impression of being a diminutive or starved form on arid 
lands, and frequently occurs on sea-coasts. It is, however, not 
often found wild in this country and is probably not native — 
the view taken by the London Catalogue, 9th ed., 1895, 
p. 44. There is room for suspicion that B. arvensis is some- 
times confused with other species. The c seed ’ of B. arvensis 
is the smallest of all I have experimented with, except 
perhaps the one called B. pratensis , and averages 7 mm. by 
1 mm., the awn being about as long, viz. 7 mm. The papery 
margin of the palea is much infolded and the nerves not very 
distinct. In the mass the ‘ seed ’ is grey-yellow with touches 
of purple. 
B. arvensis , a week old, had a leaf 1*5 cm. long by about 
1 mm. broad, bronzed, and rolled, with stiff spreading hairs. 
Forced in the intermediate pit, the spears averaged 1 cm. 
high. Seedlings a fortnight old showed a single blade 6*5 cm. 
long by 1 mm., with two ridges each side the midrib, and 
ciliated as were also the margins. Sheath almost devoid 
of hairs. ‘ Seed ’ small. 
It is smaller than B. racemosus but similarly flat, with thin 
membranous edges to the outer palea. The plumule is also 
perhaps a trifle longer and pinkish above. The whole out- 
line narrower and the awn longer. 
In seedlings grown in the open ground and having three 
or four green leaves, the lamina of the first developed leaf 
S 
