Phycomycetes

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	[[{{{domain}}}]] > [[{{{superregnum}}}]] > Plantae > [[{{{subregnum}}}]] > [[{{{superdivisio}}}]] > [[{{{superphylum}}}]] > Thallophyta > [[{{{phylum}}}]] > [[{{{subdivisio}}}]] > [[{{{subphylum}}}]] > [[{{{infraphylum}}}]] > [[{{{microphylum}}}]] > [[{{{nanophylum}}}]] > [[{{{superclassis}}}]] > [[]] > [[{{{subclassis}}}]] > [[{{{infraclassis}}}]] > [[{{{superordo}}}]] > [[]] > [[{{{subordo}}}]] > [[{{{infraordo}}}]] > [[{{{superfamilia}}}]] > [[]] > [[{{{subfamilia}}}]] > [[{{{supertribus}}}]] > [[{{{tribus}}}]] > [[{{{subtribus}}}]] > [[{{{genus}}}]] {{{subgenus}}} {{{sectio}}} {{{series}}} {{{species}}} {{{subspecies}}} var. {{{cultivar}}}

Standard Cyclopedia of Horticulture

PHYCOMYCETES. A large group of parasitic or saprophytic organisms (fungi), without chlorophyll: thallus (mycelium) of much-branched filaments (hyphae); usually without cross-walls (non-septate), as in the algal group Siphoneae: asexual reproduction by motile or non-motile spores which are usually borne in sporangia, and by conidia which are cells abstricted from the tips of specialized hyphae: sexual reproduction diverse, either by the conjugation of similar gametes, or by the conjugation of a specialized antheridial branch (male) and an enlarged oogonial branch (female) which contains the egg; free sperm-cells are rare. The order Oomycetes, with differentiated gametes, contains the following important fungi: Saprolegnia (water-mold), a whitish, aquatic mold growing on decaying plants, insects, or living fishes; Olpidium brassicae, parasitic in cells at the base of the stem of young cabbage plants causing their death; Phytophthora infestans (potato disease); Plasmopara viticola, downy or false mildew of the grape; Albugo candida, white rust of Cruciferae; Pythium de Baryanum, causing damping off of seedlings. Order Zygomycetes, with similar gametes, contains Mucor mucedo, white mold of bread, fruits, etc.; Rhizopus nigricans, a mold on bread, fruit, etc.; Empusa muscae, parasitic on houseflies, causing their death and producing a white halo about them on the surface where they die. The above text is from the Standard Cyclopedia of Horticulture. It may be out of date, but still contains valuable and interesting information which can be incorporated into the remainder of the article. Click on "Collapse" in the header to hide this text.

More information about this class can be found on the division page.

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References

• Standard Cyclopedia of Horticulture, L. H. Bailey, MacMillan Co., 1963

External links

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