BONNEMAISONIA HAMIFERA HARIOT IN NATURE AND IN CULTURE23

In culture tetraspores of the sporophyte (Trailliella intricata) of Sonnemaisonia hamifera gave rise to male gametophytes only. In the Gulf of St. Lawrence tetrasporangia occur annually during the autumn, but mature gametophytes have not been recorded. However, gametophytes with antheridia were found during the winter on the Atlantic coast of Nova Scotia. Both phases are capable of vegetative propagation, and this is probably the usual method of reproduction in nature.