Mar. 8.1924 Diploid and Polyploid Forms in Raspberries 739 
Table I .—Chromosome number and pollen condition of raspberries 
Number 
Percentage 
of 
Behavior of 
of good 
haploid 
chromosomes 
pollen. 
chromo¬ 
at meiosis. 
somes. 
Plate No. 
Subgenus Idaeobatus:’ 
Section Rosaefolii— 
1. Rubus illicebrosus . 
2. R. thunbergii . 
Section Pungentes— 
3. R. lasiostylus . 
4. R. lasiostylus dizygosXR- 
idaeus horticultural variety 
Superlative. 
Section Idaenthi— 
Series Nivei— 
5. R. co reanus . 
6. R. coreanusXR • strigo- 
sus horticultural va¬ 
riety Newman. 
7. R. phoenicolasius . 
Series Thrysidaei— 
8. R. adenophorus . 
9. R. innominatus . 
10. R. innominatusXR . 
idaeus horticultural 
variety Superlative.. . 
11. R. innominatus X(R- 
idaeus X R- strigosus) 
horticultural variety 
Cuthbert a . 
Series occidentals— 
12. R. occidentalis — 
Horticultural variety 
Cumberland .. 
Horticultural variety 
Farmer. 
Horticultural variety 
Gregg. 
13. R. occidentalis X R- 
idaeus — 
Horticultural variety 
Gregg X Wisbeck.... 
Horticultural variety 
Royal. 
14. (R. occidentalisX R . 
idaeus) X R . strigosus — 
Horticultural variety 
Cardinal. 
Horticultural variety 
Royal X Newman.... 
15. R. occidentalis X R . 
strigosus — 
Horticultural variety 
GreggXKing &. 
Series Eu-Idaea— 
97 
86 
40 
98 
75 
93 
Regular. 
...do. 
...do. 
7 ...do. 
do. 
do. 
do. 
do. 
do. 
...do. 
...do. 
...do. 
...do. 
...do. 
.. .do. 
.. .do. 
.. .do. 
.. .do. 
H 
2 K 
2 I 
2 L 
2 O 
2 P 
2 J 
2 M 
2 N 
2 G 
2 F 
16. R. mesogaeus 
89 
.do.. 
Q 
I 7 - 
R.idaeus — 
Horticultural variety 
Lloyd George. 
Horticultural variety 
Magnum Bonum.... 
99 
do. 
2 B 
® The classification of raspberry varieties used is that of Darrow; see literature cited ( 5 ). 
b The pollen count was made from one of the most fertile forms of this cross. 
