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Gamochaeta pensylvanica

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Gamochaeta pensylvanica
Scientific classification
Kingdom:
Plantae
(unranked):
Angiosperms
(unranked):
Eudicots
(unranked):
Asterids
Order:
Asterales
Family:
Asteraceae
Tribe:
Gnaphalieae
Genus:
Gamochaeta
Species:
G. pensylvanica
Binomial name
Gamochaeta pensylvanica
Synonyms[1][2]
  • Gnaphalium spathulatum Lam. 1809, illegitimate homonym not Burm.f. 1768
  • Gnaphalium pensylvanicum Willd.
  • Gnaphalium purpureum subsp. pensylvanicum (Willd.) O. Bolòs & Vigo
  • Gnaphalium peregrinum Fernald

Gamochaeta pensylvanica, called Pennsylvania cudweed[2][3] or Pennsylvania everlasting,[4] is a widespread species of flowering plant in the sunflower family. It is native to South America and introduced into Eurasia, Africa, Australia, and North America. The pensylvanica epithet is a misnomer, as the plant is not native to Pennsylvania and only marginally naturalized there.[5][6][7][8][9]

Gamochaeta pensylvanica is an annual herb up to 50 cm (20 in) tall. Leaves are up to 7 cm (2.8 in) long, light green because of woolly hairs on the surfaces (though not as dense as in some related species). The plant forms many small flower heads in elongated arrays. Each head contains 3–4 purple disc flowers but no ray flowers.[2][10]

  • Flower
    Flower
  • Plant with flowers
    Plant with flowers

References

  1. ^ Tropicos, Gnaphalium pensylvanicum Willd.
  2. ^ a b c Flora of North America, Gamochaeta pensylvanica (Willdenow) Cabrera, 1961. Pennsylvania cudweed
  3. ^ Flowers of India, Pennsylvania Cudweed. Gamochaeta pensylvanica
  4. ^ NRCS. "Gamochaeta pensylvanica". PLANTS Database. United States Department of Agriculture (USDA). Retrieved 17 July 2015.
  5. ^ Guy L. Nesom 2004. New distribution records for Gamochaeta (Asteraceae: Gnaphalieae) in the United States. Sida 21(2): 1175–1185.
  6. ^ Biota of North America Program 2014 county distribution map
  7. ^ Cabrera, A. L. 1978. Compositae. 10: 1–726. In A. L. Cabrera (ed.) Flora de la provincia de Jujuy. Instituto Nacional de Tecnología Agropecuaria, Buenos Aires
  8. ^ Jørgensen, P. M., M. H. Nee & S. G. Beck. (eds.) 2014. Catálogo de las plantas vasculares de Bolivia, Monographs in systematic botany from the Missouri Botanical Garden 127(1–2): i–viii, 1–1744.
  9. ^ Luteyn, J. L. 1999. Páramos, a checklist of plant diversity, geographical distribution, and botanical literature. Memoirs of The New York Botanical Garden 84: viii–xv, 1–278.
  10. ^ Flora of China, Gamochaeta pensylvanica (Willdenow) Cabrera, 1961. 匙叶合冠鼠麴草 shi ye he guan shu qu cao


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