TABL1 
Dimensions of leaf. The black lines in coli 
Species of 
Bromus. 
( 1 ) 
Width of 
leaf : 
direct 
measure- 
ment. 
( 2 ) 
No. 
of 
ribs. 
( 3 ) 
Distances between the ribs measured from axis to axis 
direct (low power). 
Margin 
to No. 1 
1-2 
2-3 
3-4 
4-5 
5-6 
6-7 
No. 7 to 
margin. 
Total /x. 
Me 
to 1 
B. mollis 
1-2 mm. 
3 
192 
39 ° 
402 
210 
11 94 
I 
B. tectorum 
i -7 
5 
162 
35 8 
35 8 
312 
325 
143 
^57 
2 
B. ciliatus 
1.8 
5 
169 
357 
390 
325 
325 
143 
I 7°9 
2 ! 
B. brizaeformis 
2.0 
5 
162 
325 
33 8 
345 
338 
175 
1683 
1 
B. secalinus 
2.4 
5 
260 
455 
455 
455 
455 
260 
2340 
2; 
B. macrostachys 
1.9 
5 
221 
357 
39 ° 
390 
325 
T 95 
CO 
00 
I( 
B. pratensis 
B. inermis 
1-2 
5 
143 
293 
292 
292 
293 
98 
141 1 
I( 
B. velutinus 
2-0 
$ 
227 
390 
39 ° 
39 1 
390 
227 
2015 
B. sterilis 
2*0 
5 
228 
377 
35 T 
325 
364 
i 95 
1840 
2 1 
B. maximus 
3.O 
7 
195 
325 
520 
520 
520 
520 
39 ° 
169 
3159 
19 
B. madritensis 
i -7 
5 
182 
33 S 
325 
325 
351 
169 
1690 
19 
B. Schraderi 
2*1 
7 
130 
292 
325 
325 
325 
325 
260 
130 
2112 
n 
B. unioloides 
2-5 
7 
162 
293 
338 
332 
326 
39 ° 
299 
163 
2303 
ig 
B. racemosus 
i -75 
5 
196 
365 
330 
330 
360 
220 
1801 
3 c 
B. commutatus 
i-i 
3 
160 
416 
420 
190 
Il86 
18 
B. interruptus 
1-0 
3 
160 
37 i 
352 
160 
IO43 
20 
B. arvensis 
1-2 
3 
192 
360 
384 
172 
II08 
19 
B. canadensis 
i -7 
5 
195 
325 
325 
325 
325 
162 
1657 
20 
Ann. Bot., Vol. XVI. To face p. 307.] 
