Abstract
1. The haploid numbers of chromosomes in a number of species and garden varieties of Capsicum, Solanum, Physalis, and other genera in Solanaceae were determined.
2. 49 garden varieties in Capsicum annuum, 37 such in Solanum Melongena, 6 other species in Solanum, 3 species in Physalis and 2 species in Datura were observed to present 12 chromosomes in haploid. Different numbers were also observed in some other plants studied.
3. A form of Physalis pubescenswing n=24 was found, and it was recognized, from its chromosome configulations in the meiosis, to be an autotetraploid.
