Cronartium Stalactiforme
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''Cronartium'' is a
genus Genus (; : genera ) is a taxonomic rank above species and below family (taxonomy), family as used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In bino ...
of
rust fungi Rusts are fungal plant pathogens of the order Pucciniales (previously known as Uredinales) causing plant fungal diseases. An estimated 168 rust genera and approximately 7,000 species, more than half of which belong to the genus ''Puccinia'', are ...
in the family
Cronartiaceae The Cronartiaceae are a family of rust fungi in the order Uredinales. They are heteroecious rusts with two alternating hosts, typically a pine and a flowering plant, and up to five spore stages. Many of the species are plant disease A ...
. They are
heteroecious A heteroecious parasite is one that requires at least two hosts. The ''primary host'' is the host in which the parasite spends its adult life; the other is the ''secondary host''. Both hosts are required for the parasite to complete its life cy ...
rusts with two alternating hosts, typically a
pine A pine is any conifer tree or shrub in the genus ''Pinus'' () of the family Pinaceae. ''Pinus'' is the sole genus in the subfamily Pinoideae. ''World Flora Online'' accepts 134 species-rank taxa (119 species and 15 nothospecies) of pines as cu ...
and a
flowering plant Flowering plants are plants that bear flowers and fruits, and form the clade Angiospermae (). The term angiosperm is derived from the Ancient Greek, Greek words (; 'container, vessel') and (; 'seed'), meaning that the seeds are enclosed with ...
, and up to five spore stages. Many of the species are plant
disease A disease is a particular abnormal condition that adversely affects the structure or function (biology), function of all or part of an organism and is not immediately due to any external injury. Diseases are often known to be medical condi ...
s of major economic importance, causing significant damage. ;Species, hosts and natural distribution *''
Cronartium appalachianum ''Cronartium'' is a genus of rust fungi in the family Cronartiaceae. They are heteroecious rusts with two alternating hosts, typically a pine and a flowering plant, and up to five spore stages. Many of the species are plant diseases of major ec ...
'': ''
Pinus virginiana ''Pinus virginiana'', the Virginia pine, scrub pine, Jersey pine, possum pine, is a medium-sized tree, often found on poorer soils from Long Island in southern New York south through the Appalachian Mountains to western Tennessee and Alabama. Th ...
'',
Santalaceae The Santalaceae, sandalwoods, are a widely distributed family of flowering plants (including small trees, shrubs, perennial plants, perennial herbs, and epiphyte, epiphytic climbersHewson & George t al.'Santalaceae'' taxonomy, 1984, pp. 191-1 ...
. Eastern
North America North America is a continent in the Northern Hemisphere, Northern and Western Hemisphere, Western hemispheres. North America is bordered to the north by the Arctic Ocean, to the east by the Atlantic Ocean, to the southeast by South Ameri ...
. *''
Cronartium arizonicum ''Cronartium'' is a genus of rust fungi in the family Cronartiaceae. They are heteroecious rusts with two alternating hosts, typically a pine and a flowering plant, and up to five spore stages. Many of the species are plant diseases of major ec ...
'': ''
Pinus ponderosa ''Pinus ponderosa'', commonly known as the ponderosa pine, bull pine, blackjack pine, western yellow-pine, or filipinus pine, is a very large pine tree species of variable habitat native to mountainous regions of western North America. It is th ...
'' and related pines,
Scrophulariaceae The Scrophulariaceae are a family of flowering plants, commonly known as the figwort family. The plants are annual and perennial herbs, as well as shrubs. Flowers have bilateral (zygomorphic) or rarely radial (actinomorphic) symmetry. The Scr ...
. Western North America. *''
Cronartium comandrae ''Cronartium'' is a genus of rust fungi in the family Cronartiaceae. They are heteroecious rusts with two alternating hosts, typically a pine and a flowering plant, and up to five spore stages. Many of the species are plant diseases of major ec ...
'': ''Pinus'' subgenus ''Pinus'', Santalaceae. North America. *''
Cronartium comptoniae ''Cronartium'' is a genus of rust fungi in the family Cronartiaceae. They are heteroecious rusts with two alternating hosts, typically a pine and a flowering plant, and up to five spore stages. Many of the species are plant diseases of major ec ...
'': ''Pinus'' subgenus ''Pinus'',
Myricaceae Myricaceae is a small family of dicotyledonous shrubs and small trees in the order Fagales with its type genus ''Myrica'', the sweet gales. There are three genera in the family, although some botanists separate many species from Myrica into a fo ...
. North America. *''
Cronartium conigenum ''Cronartium'' is a genus of rust fungi in the family Cronartiaceae. They are heteroecious rusts with two alternating hosts, typically a pine and a flowering plant, and up to five spore stages. Many of the species are plant diseases of major ec ...
'': ''Pinus'' subgenus ''Pinus'',
Fagaceae The Fagaceae (; ) are a family of flowering plants that includes beeches, chestnuts and oaks, and comprises eight genera with around 1,000 or more species. Fagaceae in temperate regions are mostly deciduous, whereas in the tropics, many species ...
. Southwestern North America. *''
Cronartium flaccidum ''Cronartium'' is a genus of rust fungi in the family Cronartiaceae. They are heteroecious rusts with two alternating hosts, typically a pine and a flowering plant, and up to five spore stages. Many of the species are plant diseases of major ec ...
'': ''Pinus'' subgenus ''Pinus'', several families.
Europe Europe is a continent located entirely in the Northern Hemisphere and mostly in the Eastern Hemisphere. It is bordered by the Arctic Ocean to the north, the Atlantic Ocean to the west, the Mediterranean Sea to the south, and Asia to the east ...
,
Asia Asia ( , ) is the largest continent in the world by both land area and population. It covers an area of more than 44 million square kilometres, about 30% of Earth's total land area and 8% of Earth's total surface area. The continent, which ...
. *''
Cronartium occidentale ''Cronartium'' is a genus of rust fungi in the family Cronartiaceae. They are heteroecious rusts with two alternating hosts, typically a pine and a flowering plant, and up to five spore stages. Many of the species are plant diseases of major ec ...
'': ''Strobus'' subgenus ''Strobus'',
Saxifragaceae Saxifragaceae is a family of Herbaceous plant, herbaceous Perennial plant, perennial flowering plants, within the core eudicot Order (biology), order Saxifragales. The Taxonomy (biology), taxonomy of the family has been greatly revised and the ...
. Southwestern North America. *''
Cronartium orientale ''Cronartium'' is a genus of rust fungi in the family Cronartiaceae. They are heteroecious rusts with two alternating hosts, typically a pine and a flowering plant, and up to five spore stages. Many of the species are plant diseases of major ec ...
'': ''Pinus'' subgenus ''Pinus''
Quercus An oak is a hardwood tree or shrub in the genus ''Quercus'' of the beech family. They have spirally arranged leaves, often with lobed edges, and a nut called an acorn, borne within a cup. The genus is widely distributed in the Northern Hemisp ...
. Japan. *''
Cronartium quercuum ''Cronartium quercuum'', also known as pine-oak gall rust is a fungal disease of pine (''Pinus'' spp.) and oak (''Quercus'' spp.) trees. Similar to pine-pine gall rust, this disease is found on pine trees but its second host is an oak tree rath ...
'': ''Pinus'' subgenus ''Pinus'',
Fagaceae The Fagaceae (; ) are a family of flowering plants that includes beeches, chestnuts and oaks, and comprises eight genera with around 1,000 or more species. Fagaceae in temperate regions are mostly deciduous, whereas in the tropics, many species ...
. North America, Asia. *''
Cronartium ribicola ''Cronartium ribicola'' is a species of rust (fungus), rust fungus in the family Cronartiaceae that causes the disease white pine blister rust. Other names include: (French), (German), (Spanish). Origin ''Cronartium ribicola'' is native to C ...
'': ''Pinus'' subgenus ''Strobus'',
Grossulariaceae ''Ribes'' () is a genus of about 200 known species of flowering plants, most of them native to the temperate regions of the Northern Hemisphere. The species may be known as various kinds of currants, such as redcurrants, blackcurrants, and whi ...
. Europe, Asia. *'' Cronartium stalactiforme'': ''Pinus'' subgenus ''Pinus'', Scrophulariaceae. North America. *''
Cronartium strobilinum ''Cronartium'' is a genus of rust fungi in the family Cronartiaceae. They are heteroecious rusts with two alternating hosts, typically a pine and a flowering plant, and up to five spore stages. Many of the species are plant diseases of major eco ...
'': ''Pinus'' subgenus ''Pinus'', Fagaceae. Southeastern North America. Some of the species have been introduced accidentally outside of their natural ranges, notably ''C. ribicola'' into North America, where it is an
invasive species An invasive species is an introduced species that harms its new environment. Invasive species adversely affect habitats and bioregions, causing ecological, environmental, and/or economic damage. The term can also be used for native spec ...
causing heavy mortality in several pines which have little or no resistance to it.


References and external links

* Millar, C. I. & Kinloch, B. B. (1991). Taxonomy, phylogeny, and coevolution of pines and their stem rusts. pp. 1–38 in: Hiratsuka, Y. et al. (1991). ''Rusts of pine. Proceedings of the IUFRO Rusts of Pine Working Party Conference''. Forestry Canada Information Report NOR-X-317.
Forestry Images: photos of some ''Cronartium'' rusts
Pucciniales Taxa named by Elias Magnus Fries Basidiomycota genera {{Teliomycotina-stub