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A CYTOLOGICAL INVESTIGATION OF SOME SPECIES 
and White Ceram ; Red and Yellow German New Guinea, and Yel- 
low Caledonia. In this group many vigorously growing kinds occur, 
with a strong root-system and little susceptibility to sereh. Besi- 
des a high male and female fertility, entire sterility occurs within 
the group, in extreme cases stamens as well as pistils are even 
absent. 
Fidji. Stems long and thick, first yellow, later dark-red. Internodes 
long, cilindrical, clearly zig-zag. „Leaf crown” fastigiate, someti- 
mes with a wine-red hue. Frequently flowering, with a large inflo- 
rescence. Male and female fertile. Used with great success for cros- 
sing on Java. 
Batjan. Occurs in two forms: one entirely green, the other a green 
and yellow striped budvariation with white stripes on the leaf- 
sheaths which may extend to the leaf-blades. Stem rather thin, 
internodes conical. „Leaferown’” fastigiate with narrow leaves. 
Production of cane and sugar high. Very susceptible to sereh and 
yellow stripe disease. Flowers rather frequently, with small inflo- 
rescences. Pollen-quantity rather small, 50% of which only is nor- 
mal. When striped Batjan is used as the motherplant in a cross, en- 
tirely white seedlings may be formed, which die soon. The cause of 
this is the occasional presence of white sectors without any chloro- 
phyll in the inflorescence. Much used for crossing, because its seed- 
lings also give a large production of cane and sugar. 
Bandjermasin hitam. Stems dark brown-red, with a distinct wax-co- 
vering. Internodes rather short, cylindrical to barrel-shaped. Lea- 
ves broad, drooping. Production of much cane and rather much 
sugar. Susceptible to sereh, yellow stripe-disease and rootrot. Flo- 
wers frequently with large inflorescences. Female fertility good, 
male fertility poor. About one half of the anthers opens and gives 
a small quantity of pollen, 50% of which only is normal. The plant 
can be used without castration as female plant in crossing as self- 
fertilisation then occurs but sporadically. 
Closely related to this kind are, among others: Black Cheribon, 
Black Borneo, Soerat Banteng and Soerat Bali. All these kinds have 
a low male fertility or are entirely sterile in that sex, the anthers 
remaining closed. Of black Cheribon, which had been investigated 
cytologically by FRANCK sub nomine: Red Egyptian cane, and of 
which he determined the diploid chromosomenumber as 28, the 
