Asplenium X Clermontae Sim from Clifton Gorge, Greene County, Ohio - A Second North American Record

Abstract

The Ohio Asplenium X clermontae, like the earlier collections from Vermont, seems to differ slightly from the european examples of the same hybrid combination in the structure of the basal pinnae. We examined the mciotic chromosomes in spore mother cells taken from the greenhouse-grown plants. The parents at this locality arc both tetraploids, each with n = 72, 2» = 144. We can conclude we have at least an approximate estimate of pairing behavior in the hybrid.