Hamatani, S., Hashimoto. K. (The Hiroshima Botanical Garden)
Karasawa, K. (Orchid Museum Takamori, Nagano Prefecture)

Chromosome counts in subtribe Oncidiinae, the Orchidaceae. 1. Ten species in nine genera

Somatic chromosome at resting stage and metaphase were studied in ten species in the subtribe Oncidinae. Resting chromosome in six species showed the round prochromosome type, those in three species showed the complex chromocenter type and those in one species showed the simple chromocenter type. Eight species had common chromosome number of 2n=56, on species had 2n=44 and one one species had 2n=60. The chromosome numbers of the ten species were recorded here for the first time.