Abstract
Karyomorphological studies of Amorphophallus campanulatus Blume (Araceae) were pursued at pachytene and at root tip and pollen mitotic metaphases. The haploid complement (n = 14) at root and pollen mitoses could be categorized under six types including two nucleolar chromosomes. The karyotypes at these two stages were in agreement except for the relative lengths of one of the nucleolar chromosomes. The chromosomes at prophase of pollen mitosis and pachytene were characterized by differential staining. The two nucleolar chromosomes at pollen mitosis and pachytene were similar in general morphology and length relationships. Adopting suitable morphological criteria, the haploid chromosomal complement is identified. Based on this data and other considerations, a polyploid origin for this species was suggested and the urgent need for a comprehensive cytological survey of this genus is stressed.
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