116 Harris AND AVERY: MORPHOLOGICAL VARIATIONS 
around the modal classes 3,6 and 9. The results in TaBLe VIII 
show essentially the same relationships as those given in TABLES 
VI-VII. First, the higher leaflet numbers are more extensively 
represented in the abnormal plants of each of the four types than 
they are in the controls. Second, the tricotyledonous plants show 
a far greater increase in the number of leaflets inserted at the third 
node than do those abnormal only in the position at which the 
two cotyledons are inserted. 
TABLE VIII 
PERCENTAGE FREQUENCIES OF NUMBERS OF LEAFLETS IN SEEDLINGS OF VARIOUS 
TYPES 
a 
Number of leaflets 
Class of abnormality 
I-4 5-7 8-11 
T. ty a 1 gl y Dp 4 4 primord al 
IOAVOR hs a a Si es wey Pee eh se pee cles 94.32 5.62 .05 
AOE oe Se ae ees tes es os 95.66 4.34 ape 
Dieter ie as i pe eee — 1.34] + 1.28| +.05 
ia PE OT ree | wa & A 1 
sinh sia Y t a 
VEE are WN See ee oe bees See eee ee 92.37 4.63 
MRTG ene te se Ce wee ee Hew Ca ne ee ale ba 95.23 77 
Dilerette is ee a ee eS ae — 2.8 + 2.86 
Th tyled dtwop Hal leaves... oe. oss 72.57 27.18 24 
Comirat. Soe a ee ee 95-64 4. 
EBiif cross pier Were Carma eae | eter er Venera —23.07 | +22.82 +.24 
Th tyled d ti Pp dial leaves. 2:..... 67.72 32.03 25 
COOUIOR Se ea ees ee ee a ees 90.23 9.77 slay 
Differenee oso oo re Po oe i et ee —22.51 | +22.26 +.25 
In substantiation of these conclusions the reader will note that 
in the class with slightly separated cotyledons 5.68 per cent. of the 
plants have from five to ten leaflets as compared with 4.34 per 
cent. with five and six leaflets in the control series. In seedlings 
with more widely separated cotyledons but no other abnormality 
there are 7.63 per cent. of the plants with five to seven leaflets as 
compared with 4.77 per cent. of the normal controls with five or 
six leaflets. Seedlings with three cotyledons but the normal number 
of primordial leaves have 27.43 per cent. of the individuals with 
from five to nine leaflets as compared with 4.36 per cent. with five 
or six leaflets in the normal controls. 
Plants with a trimerous cotyledonary and primordial whorl 
have 32.28 per cent. of the seedlings with from five to eleven leaflets 
