PLATE 2 
Pollen-mother-cells of rubi at diakenisis:® 
A. —Rubus strigosus. 
B. —Rubus idaeus. Horticultural variety Lloyd George (early heterptypic meta¬ 
phase). 
C. — Rubus occidental™ . Horticultural variety Cumberland, showing the two, long, 
slender chromosomes. 
D. —Rubus idaeusXstrigosus. Horticultural variety Cuthbert (early prophase). 
E. — Rubus occidentalisXidaeus . Horticultural variety GreggXWisbeck. 
F. — Rubus occidentalisXstrigosus . Horticultural variety GreggXKing. 
G. — Rubus (occidentalisX idaeus) X strigosus . Horticultural variety RoyalX Newman 
No. 23. 
H. — Rubus lasiostylus. 
I. —Rubus coreanus. 
T .—Rubus innominatus. 
K. —Rubus lasiostylus variety dizygosXidaeus horticultural variety Superlative. 
L. —Rubus coreanusXstrigosus horticultural variety Newman. 
M. —Rubus innominatusXidaeus horticultural variety Superlative. 
N. —Rubus innominatusX(idaeusXstrigosus) horticultural variety Cuthbert. 
O. —Rubus phoenicolasius. 
P. —Rubus adenophorus. 
O .—Rubus mesogaeus. 
a Drawings reduced one-half. 
