1. Yoshinari Kawada. Ueber die Chromosomenzahl von Zea Mays L. Botanical Magazine Vol. XXIX, 1915, p. 87.
2. It results from a preliminary investigation, thatTeboe Hitam Rokan, which in habit differs somewhat fromSaccharum officinarum, possesses about 30 chromosomes in the haploid phase, whileLoether's cane, which, on selfing, gives types, differing fromS. officinarum, has about 50 chromosomes in the haploid phase.
3. G. Tischler. Untersuchungen ueber die Entwicklung des Bananenpollens I. Archiv f. Zellforschung. Bd. V. p. 649.
4. W. Bally. Die Godronschen Bastarde zwischenAegilops- undTriticum-arten. Zeitschr. f. ind. Abst. u. Vererbungslehre. Bd. XX, 1919.
5. C. A. Barber. The origin of the Sugracane. International Sugar Journal. Vol. XXII. 1920, p. 249.