Pyrus Americana, DC

1877 Botanical Gazette  
81 the plant when growing. I have observed the same phenomena, and apparently from the same cause, in other species, but it sometimes occurs when the plant has not received any injury. I have a specimen of B. Virginianutm with two perfect fertile spikes, the common stalk forking just above the union with the sterile frond. The tendency to fork on the part of our ferns I have found to be quite common. I have noticed and received from correspondents, numerous specimens of the different genera and
more » ... ifferent genera and species. Some curious examples occur in Camptosora~s, some specimens forking directly froml the simply auricled base, making a double frond, and others forking from the longattenuated tips. In Dicksonia I have observed specimens in which not only the frond but the pinnse also were forked.-GEO. E. DAVENPORT.
doi:10.1086/325030 fatcat:s7dhsx4a55gvtaws5vgh2eyhd4