Coprinus Urticaecola on Stems of Marquis Wheat

SUMMARY

1.	Coprinus urticaecola (Berk. & Br.) Buller was found at Winnipeg in 1934 on Marquis wheat. The fruit-bodies were attached near the ground level to leaf sheaths of green plants. In 1937 the species was collected again on decaying nettle stems. It is considered to be identical with C. Brassicae Peck, and C. phaeosporus Karst, sensu Lange.
2.	Spore germination and growth of the mycelium occurred readily on potato-dextrose agar. The species fruited on a number of sterile media, but fruit-bodies failed to appear when wheat plants growing in the greenhouse were inoculated with pure cultures of the mycelium.
3.	C. urticaecola is heterothallic and bisexual. The diploid mycelium bears clamp connections. Small sclerotia were formed on one of the diploid cultures growing on potato-dextrose agar. The species is described and illustrated.