Marshallia grandiflora was an herb up to 90 cm (3 feet) tall. Most of the leaves were clustered around the base of the stem. One plant would produce one or two heads, each head containing pink disc flowers but no ray flowers.[5]
It was formerly considered conspecific with M. pulchra, the beautiful Barbara's buttons or Monongahela Barbara's buttons, which is endemic to the central Appalachia region from southwestern Pennsylvania to eastern Tennessee, with the largest population occurs along the Gauley River in West Virginia.[6][7] A 2020 study found the two populations to represent distinct species, and thus only the North Carolina population was kept in M. grandiflora, with the Central Appalachian populations being reclassified into the new species M. pulchra. Both species are closely related to one another and to M. legrandii.[3]M. pulchra is also threatened by changes to its habitat.[4]
ReferencesEdit
^Britton, N.L., and A. Brown. 1913. An illustrated flora of the northern United States, Canada and the British Possessions. Vol. 3: 503.
^ abKnapp, Wesley M.; Poindexter, Derick B.; Weakley, Alan S. (2020-06-04). "The true identity of Marshallia grandiflora , an extinct species, and the description of Marshallia pulchra (Asteraceae, Helenieae, Marshalliinae)". Phytotaxa. 447 (1): 1–15. doi:10.11646/phytotaxa.447.1.1. ISSN 1179-3163.
^ ab"Newly Discovered Wetland Flower in North Carolina Already Extinct". Center for Biological Diversity. Retrieved 2020-06-28.
^Flora of North America, Marshallia grandiflora Beadle & F. E. Boynton, 1901.
^United States Department of Agriculture plants profile map, accessed 12.1.2011
^Biota of North America Program 2014 county distribution map
External linksEdit
USDA Plants Profile for Marshallia grandiflora (Monongahela Barbara's buttons) photo
This Helenieae article is a stub. You can help Wikipedia by expanding it.
marshallia, grandiflora, appalachian, barbara, buttons, extinct, species, flowering, plant, genus, marshallia, within, sunflower, family, endemic, blue, ridge, mountains, north, carolina, eastern, united, states, henderson, polk, counties, found, primarily, al. Marshallia grandiflora the Appalachian Barbara s buttons is an extinct species of flowering plant in the genus Marshallia within the sunflower family It was endemic to the Blue Ridge Mountains of North Carolina in the Eastern United States in Henderson and Polk counties It was found primarily along gravelly and sandy bars along high gradient rivers and was presumably wiped out due to changes in this restricted habitat It was last sighted in 1919 3 4 Marshallia grandiflora1913 illustration 1 Conservation statusPresumed Extinct NatureServe 2 Scientific classificationKingdom PlantaeClade TracheophytesClade AngiospermsClade EudicotsClade AsteridsOrder AsteralesFamily AsteraceaeGenus MarshalliaSpecies M grandifloraBinomial nameMarshallia grandifloraBeadle amp F E Boynton 1901Marshallia grandiflora was an herb up to 90 cm 3 feet tall Most of the leaves were clustered around the base of the stem One plant would produce one or two heads each head containing pink disc flowers but no ray flowers 5 It was formerly considered conspecific with M pulchra the beautiful Barbara s buttons or Monongahela Barbara s buttons which is endemic to the central Appalachia region from southwestern Pennsylvania to eastern Tennessee with the largest population occurs along the Gauley River in West Virginia 6 7 A 2020 study found the two populations to represent distinct species and thus only the North Carolina population was kept in M grandiflora with the Central Appalachian populations being reclassified into the new species M pulchra Both species are closely related to one another and to M legrandii 3 M pulchra is also threatened by changes to its habitat 4 References Edit Britton N L and A Brown 1913 An illustrated flora of the northern United States Canada and the British Possessions Vol 3 503 Marshallia grandiflora NatureServe a b Knapp Wesley M Poindexter Derick B Weakley Alan S 2020 06 04 The true identity of Marshallia grandiflora an extinct species and the description of Marshallia pulchra Asteraceae Helenieae Marshalliinae Phytotaxa 447 1 1 15 doi 10 11646 phytotaxa 447 1 1 ISSN 1179 3163 a b Newly Discovered Wetland Flower in North Carolina Already Extinct Center for Biological Diversity Retrieved 2020 06 28 Flora of North America Marshallia grandiflora Beadle amp F E Boynton 1901 United States Department of Agriculture plants profile map accessed 12 1 2011 Biota of North America Program 2014 county distribution mapExternal links EditUSDA Plants Profile for Marshallia grandiflora Monongahela Barbara s buttons photo nbsp This Helenieae article is a stub You can help Wikipedia by expanding it vte Retrieved from https en wikipedia org w index php title Marshallia grandiflora amp oldid 1126153415, wikipedia, wiki, book, books, library,
