AND SPECIES-HYBRIDS WITHIN THE GENUS SACCHARUM 293 
pa) found for Saccharum officinarum do not tally with the haploid 
number 40 found by me. 
FRANCK found diploid 28, haploid 14. He investigated the somatic 
number in the case of Red Egyptian cane, which, both according to 
MOoQUETTE’s, as to JESWIET’s judgement, is identical with Black Cheri- 
bon-cane. In the case of both these canes, I found in the somatic cells 
about 80 chromosomes. The haploid chromosomenumber was determi- 
ned by FRANCK in the case of the seedling 234 of the Experimentsta- 
tion Oost-Java at Pasoeroean. This seedling is a species-hybrid between 
Black Cheribon and Chunnee. KoBus, who imported the British Indian 
variety Chunnee, was already of opinion, that Chunnee could not be- 
long to Saccharum officinarum, KUWADA gives about 68 as the diploid 
chromosome-number of both Saccharum officinarum and S. sponta- 
neum. He pictures a nuclear plate of a somatic cell of S. officinarum. 
This drawing gives a tolerably good picture of such a nuclear plate. 
That KuwADA, in the case of S. officinarum, concluded to a somewhat 
lower chromosomenumber than 80 may have been caused by the fact, 
that counts are extremely difficult. To me it is not so easily explained 
why he came to the same number of 68 in the case of S. spontaneum. 
The chief-results of my investigation are: 
1°. that different forms of the species Saccharum spontaneum have 
the same chromosome-number. 
2°. that five very different forms of the species Saccharum officina- 
yum have the same chromosomenumber, which number differs from 
that of S. spontaneum. 
3°. that two British Indian Saccharum-varieties, which, according 
to JESWIET, probably belong to a species of Saccharum growing spon- 
taneously in British-India, have a corresponding chromosomenumber, 
differing from the numbers of S. spontaneum and S. officinarum. 
So far then, those forms have a corresponding chromosomenumber, 
which also correspond in certain morphological characters, so that the 
subdivision of Saccharum based on the different chromosomenumbers 
runs parallel to its subdivision, based on morphological characters. 
In the case of Saccharum-forms, which, on account of certain more 
or less deviating habit-characters, can but doubtfully be referred to 
1) YOSHINARI Kawapa. Ueber die Chromosomenzahl von Zea Mays L. Bota- 
nical Magazine Vol. XXIX, 1915, p. 87. 
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