TESTS OF BARLEY VARIETIES IX AMERICA 
205 
In Table 94 the terms relating to the fertility of lateral florets 
must necessarily be definite. The central floret is always fully 
fertile. In the 6-rowed barleys the lateral florets also are fertile. 
In the 2-rowed varieties they are present but sterile. Besides these 
two classes, which include all our common varieties, there are two 
other groups, the homozygous intermediate and the deficient. In 
the intermediate barleys the lateral florets are fertile, but the resulting 
kernels are usually smaller than in the 6-rowed varieties, and the 
percentage of fertility is lower. The most conspicuous characteristic 
of the intermediate barley is in the lack of appendages on the lateral 
floret. These florets are characterized by rounded lemmas, while the 
central ones may bear long awns or hoods. 
The fourth variation, the deficient barleys, concerns a stiU further 
reduction of the lateral florets than is found in the common 2-rowed 
varieties. These barleys are 2-rowed, of course, but the lateral 
spikelets are reduced to the outer glumes and lemma. The palet is 
sometimes present, but sexual organs are never found. 
BOTANICAL COMPARISON OF PROMINENT VARIETIES 
It is quite obvious that the abridged description given in Table 
94 affords only a general conception of the nature of the varieties. 
The separation of similar strains from the same parent stock is very 
difficult. It is the opinion of the WTiters that the nomenclature used 
in taxonomic work should not be carried beyond the major groups. 
The variations of barley are so numerous that the varieties can be 
arranged in a great number of ways. 
If an attempt is made to gather these under named taxonomic 
groups, it is impossible to avoid placing forms of totally different and 
unrelated adaptation in a group where the type variety is ecologically 
unrelated to them. Thus, if the Svalof characters of minor variation, 
such as the toothing of the nerves and the nature of the basal bristle, 
are appended to the usual classifications it is perfectly possible, even 
in the ultimate divisions of morphological groupings, to find a winter 
variety suited to the arid conditions of North Africa occurring as a 
variation of a spring variety from Manchuria suited to humid 
conditions. 
Table 95. — Botanical comparison of prominent varieties of barley 
[Many of these characters are not comparable unless grown under identical conditions. Explanation. — 
In column 3: D = deficient, I = intermediate, 2 = 2-rowed, 6=6-rowed. In column 4: H = hulled, N = 
naked. In column 5: A = awned, Al = awnless, H=hooded, Sa=smooth awned. In column 6:* = 1 
head only, t = variable. In column 7: L=long, S=short, L3 = mixed (both long and short). In col- 
umn 8: B=blue, Bk=blaek, BW=blue and white, V = violet, W=white. In column 10: A = Aber- 
deen, Idaho; Ag=Arlin?ton Farm, Va. (greenhouse); Ak = Akron, Colo.; C = Chico, Calif.; D = 
Davis, Calif.; Di=Dickinson, N. Dak.; S = St. Paul, Minn.; W = Madison, Vris. 
C.I. 
No. 
Fer- 
tility 
Cary- 
opsis 
Lem- 
ma 
Spike 
den- 
sity 
(mm.) 
Ra- 
chilla 
Color 
Seed 
length 
(mm.) 
Place 
and 
year 
grown 
At Aberdeen, 
Idaho, in 1921 
Variety and station No. 
Awns 
emerged 
Culm 
length 
(cm.) 
1 
•2 
3 
4 
5 

7 
8 
9 
10 
11 
1-2 
Charlottetown 80 
Chevalier 11 
2732 
200 
175 
926 
2 
2 
2 
II 
11 
11 
11 
A 
A 
A 
A 
3.5 
3.0 
3.5 
3.6 
s 
s 
s 
W 
W 
9.1 
9.2 
7.9 
9.0 
A 1921 
A 1921 
Agl923 
A 1921 
July 30 
...do 
94 
86 
Horn 
s w 
July 28 
101 
