melanconiales, n. pl. [NL., fr. Melanconium, name of the typical genus, fr. Gr. me`las black + dust, in allusion to the dark spores.].
The smallest of the three orders of Fungi Imperfecti, including those with no asci nor pycnidia, but as a rule having the spores in cavities without special walls. They cause many of the plant diseases known as anthracnose. [Webster 1913 Suppl.]