Urediniomycetes (rust fungi; subdivision Basidiomycotina) A class of fungi that are obligate parasites (see PARASITISM) of a wide variety of plants including angiosperms, gymnosperms, and pteridophytes. Many have complex life cycles that involve the sequential formation of up to 5 different types of spore. Some rusts can complete their life cycle in a single host plant, while others require two different host species.
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heterogynous , heterogynous Applied to species (e.g. many members of the Cynipidae) whose life cycle involves the production of alternating sexual and agamic genera… Heteroecious , heteroecious(heteroxenous) Applied to a parasitic organism (e.g. the rust fungus Puccinia graminis) in which part of the life cycle occurs obligatori… Parasitism , Parasitism describes a relationship between two species, a parasite and its host, in which the parasite benefits, while the host is harmed. Parasitis… Coccidians , Haemosporina (subclass Coccidia, order Eucoccidia) A suborder of protozoa in which gametocytes develop independently, i.e. syzygy does not occur. Mor… Flukes , Trematoda Trematodes and flukes are the common names for the flatworms in the class Trematoda, phylum Platyhelminthes. Trematodes have most of the sa… Hemiparasite , hemiparasite (semiparasite) 1. A parasitic plant that lacks a fully developed root system and forms connections with another plant, from which it obt…
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