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- Helenium_virginicum abstract "Helenium virginicum is a rare species of flowering plant in the aster family known by the common name Virginia sneezeweed. It occurs in the United States, where it has a disjunct distribution; it is known only from Virginia and Missouri. It is limited to a specific type of habitat and it is threatened by modification of this habitat. It was federally listed as a threatened species of the United States in 1998.At the time the plant received federal protection it was known from 28 populations in two Virginia counties. Soon after, a population of similar plants was found in Missouri and by genetic analysis were confirmed to be of the same species. Searches turned up a total of 44 occurrences in six counties in the Ozark Highlands of Missouri. This disjunct distribution was probably caused by the cleaving of the species' geographical range during Pleistocene glaciation, leaving two relict ranges.Helenium virginicumis similar to and often mistaken for Helenium autumnale, the common sneezeweed. It is a perennial herb generally growing to a maximum height between 70 centimeters and 1.1 meters (28-44 inches), but it is known to reach 1.7 meters (68 inches or 5 2/3 feet) at times. There is a basal rosette of leaves and an erect, winged stem lined with lance-shaped leaves that become smaller toward the top of the stem. The inflorescence has several flower heads, each with a spherical disc covered with disc florets and lined with yellow ray florets just over a centimeter (0.4 inches) long. Blooming occurs in July through October. The plant is self-incompatible.Helenium virginicum only grows near sinkhole ponds in the Ozark Highlands of Missouri and the western margin of the Blue Ridge Mountains in Virginia. These ponds are lined with clay or bedrock and are filled with water from about January to June or July each year. They may take the form of actual holes or they may be more like very wet meadows. The ponds are often actively grazed by cattle and can tolerate disturbance. The hydrology of the sinkholes varies seasonally and year to year, causing a similar fluctuation in the population and recruitment of the sneezeweed.The greatest threat to this species is habitat modification. Destruction of the sinkhole habitat could lead to the extinction of the species.".
- Helenium_virginicum binomialAuthority Sidney_Fay_Blake.
- Helenium_virginicum class Eudicots.
- Helenium_virginicum conservationStatus "G3".
- Helenium_virginicum conservationStatusSystem "TNC".
- Helenium_virginicum division Flowering_plant.
- Helenium_virginicum family Asteraceae.
- Helenium_virginicum genus Helenium.
- Helenium_virginicum kingdom Plant.
- Helenium_virginicum order Asterales.
- Helenium_virginicum order Asterids.
- Helenium_virginicum wikiPageExternalLink profile?symbol=HEVI6.
- Helenium_virginicum wikiPageExternalLink ImageFullView.aspx?imageid=89237.
- Helenium_virginicum wikiPageID "31443932".
- Helenium_virginicum wikiPageLength "5332".
- Helenium_virginicum wikiPageOutDegree "38".
- Helenium_virginicum wikiPageRevisionID "671306392".
- Helenium_virginicum wikiPageWikiLink Angiosperms.
- Helenium_virginicum wikiPageWikiLink Asteraceae.
- Helenium_virginicum wikiPageWikiLink Asterales.
- Helenium_virginicum wikiPageWikiLink Asterids.
- Helenium_virginicum wikiPageWikiLink Bedrock.
- Helenium_virginicum wikiPageWikiLink Blue_Ridge_Mountains.
- Helenium_virginicum wikiPageWikiLink Category:Flora_of_Missouri.
- Helenium_virginicum wikiPageWikiLink Category:Flora_of_Virginia.
- Helenium_virginicum wikiPageWikiLink Category:Helenium.
- Helenium_virginicum wikiPageWikiLink Category:Plants_described_in_1936.
- Helenium_virginicum wikiPageWikiLink Disc_floret.
- Helenium_virginicum wikiPageWikiLink Disjunct_distribution.
- Helenium_virginicum wikiPageWikiLink Eudicots.
- Helenium_virginicum wikiPageWikiLink Extinction.
- Helenium_virginicum wikiPageWikiLink Flowering_plant.
- Helenium_virginicum wikiPageWikiLink Genetic_analysis.
- Helenium_virginicum wikiPageWikiLink Glacial_period.
- Helenium_virginicum wikiPageWikiLink Glaciation.
- Helenium_virginicum wikiPageWikiLink Grazing.
- Helenium_virginicum wikiPageWikiLink Head_(botany).
- Helenium_virginicum wikiPageWikiLink Helenium.
- Helenium_virginicum wikiPageWikiLink Helenium_autumnale.
- Helenium_virginicum wikiPageWikiLink Hydrology.
- Helenium_virginicum wikiPageWikiLink Inflorescence.
- Helenium_virginicum wikiPageWikiLink Meadow.
- Helenium_virginicum wikiPageWikiLink Missouri.
- Helenium_virginicum wikiPageWikiLink Ozark_Highlands.
- Helenium_virginicum wikiPageWikiLink Ozark_Highlands_AVA.
- Helenium_virginicum wikiPageWikiLink Ozarks.
- Helenium_virginicum wikiPageWikiLink Plant.
- Helenium_virginicum wikiPageWikiLink Plantae.
- Helenium_virginicum wikiPageWikiLink Pleistocene.
- Helenium_virginicum wikiPageWikiLink Pseudanthium.
- Helenium_virginicum wikiPageWikiLink Ray_florets.
- Helenium_virginicum wikiPageWikiLink Recruitment_(biology).
- Helenium_virginicum wikiPageWikiLink Relict.
- Helenium_virginicum wikiPageWikiLink Rosette_(botany).
- Helenium_virginicum wikiPageWikiLink Self-incompatibility_in_plants.
- Helenium_virginicum wikiPageWikiLink Sidney_Fay_Blake.
- Helenium_virginicum wikiPageWikiLink Sinkhole.
- Helenium_virginicum wikiPageWikiLink The_Ozarks.
- Helenium_virginicum wikiPageWikiLink Virginia.
- Helenium_virginicum wikiPageWikiLinkText "Helenium virginicum".
- Helenium_virginicum binomial "Helenium virginicum".
- Helenium_virginicum binomialAuthority Sidney_Fay_Blake.
- Helenium_virginicum familia Asteraceae.
- Helenium_virginicum genus "Helenium".
- Helenium_virginicum hasPhotoCollection Helenium_virginicum.
- Helenium_virginicum ordo Asterales.
- Helenium_virginicum regnum Plant.
- Helenium_virginicum regnum Plantae.
- Helenium_virginicum species "H. virginicum".
- Helenium_virginicum status "G3".
- Helenium_virginicum statusSystem "TNC".
- Helenium_virginicum unrankedClassis Eudicots.
- Helenium_virginicum unrankedDivisio Angiosperms.
- Helenium_virginicum unrankedDivisio Flowering_plant.
- Helenium_virginicum unrankedOrdo Asterids.
- Helenium_virginicum wikiPageUsesTemplate Template:Reflist.
- Helenium_virginicum wikiPageUsesTemplate Template:Taxobox.
- Helenium_virginicum subject Category:Flora_of_Missouri.
- Helenium_virginicum subject Category:Flora_of_Virginia.
- Helenium_virginicum subject Category:Helenium.
- Helenium_virginicum subject Category:Plants_described_in_1936.
- Helenium_virginicum hypernym Species.
- Helenium_virginicum type Article.
- Helenium_virginicum type Eukaryote.
- Helenium_virginicum type Plant.
- Helenium_virginicum type Species.
- Helenium_virginicum type Article.
- Helenium_virginicum type Thing.
- Helenium_virginicum type Q19088.
- Helenium_virginicum type Q756.
- Helenium_virginicum comment "Helenium virginicum is a rare species of flowering plant in the aster family known by the common name Virginia sneezeweed. It occurs in the United States, where it has a disjunct distribution; it is known only from Virginia and Missouri. It is limited to a specific type of habitat and it is threatened by modification of this habitat.".
- Helenium_virginicum label "Helenium virginicum".
- Helenium_virginicum sameAs m.0gkyb6p.
- Helenium_virginicum sameAs Helenium_virginicum.
- Helenium_virginicum sameAs Q5703950.
- Helenium_virginicum sameAs Q5703950.
- Helenium_virginicum wasDerivedFrom Helenium_virginicum?oldid=671306392.
- Helenium_virginicum isPrimaryTopicOf Helenium_virginicum.