Gamochaeta

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Gamochaeta
Gamochaeta calviceps
Scientific classification
Kingdom: Plantae
(unranked): Angiosperms
(unranked): Eudicots
(unranked): Asterids
Order: Asterales
Family: Asteraceae
Subfamily: Asteroideae
Tribe: Gnaphalieae
Genus: Gamochaeta
Wedd.
Species

Many, see text.

Gamochaeta is a genus of flowering plants in the aster family. There has not always been agreement among botanists regarding its status as a valid genus, but it has become more accepted in recent years.[1][2] It currently includes many plants that previously belonged in genus Gnaphalium. Like many species of Gnaphalium, many Gamochaeta are called cudweeds or everlastings.

Gamochaeta are native to the Americas,[2] especially South America.[3] Some species are found practically worldwide as introduced species outside of their native ranges, and sometimes as invasive noxious weeds.[2]

Plants of this genus have "relatively small heads in spiciform (spikelike) arrays, concave post-fruiting receptacles, truncate collecting appendages of style branches in bisexual florets, relatively small cypselae (fruits) with minute, mucilage-producing papilliform hairs on the faces, and pappus bristles basally connate (joined) in smooth rings and released as single units."[2]

There are 50 to 80 species.[3]

Species include:[2][4][5][6][7]

  • Gamochaeta americana - lechuguilla, palomita, American everlasting
  • Gamochaeta antarctica - Antarctic cudweed
  • Gamochaeta antillana - delicate everlasting
  • Gamochaeta argyrinea - silvery cudweed
  • Gamochaeta beckii[8]
  • Gamochaeta calviceps
  • Gamochaeta chionesthes - white-cloaked cudweed
  • Gamochaeta coarctata - elegant cudweed, gray everlasting
  • Gamochaeta falcata - narrowleaf purple everlasting
  • Gamochaeta nanchuanensis
  • Gamochaeta norvegica
  • Gamochaeta pensylvanica - Pennsylvania cudweed
  • Gamochaeta purpurea - spoon-leaf cudweed, purple cudweed
  • Gamochaeta simplicicaulis - simple-stem cudweed
  • Gamochaeta sphacelata or G. sphacilata - owl's crown
  • Gamochaeta stachydifolia
  • Gamochaeta stagnalis - desert cudweed
  • Gamochaeta sylvatica
  • Gamochaeta ustulata - featherweed, Pacific cudweed

References

  1. ↑ Nesom, G. L. 1990. The taxonomic status of Gamochaeta (Asteraceae: Inuleae) and the species of the United States. Phytologia 68: 186–198.
  2. ↑ 2.0 2.1 2.2 2.3 2.4 Gamochaeta. Flora of North America.
  3. ↑ 3.0 3.1 Evenhuis, N. L. and L. G. Eldredge, Eds. (2012). Records of the Hawaii Biological Survey for 2011. Part II: Plants. Bishop Museum Occasional Papers No. 113.
  4. ↑ Gamochaeta. The Plant List.
  5. ↑ Gamochaeta. Germplasm Resources Information Network.
  6. ↑ Gamochaeta. Integrated Taxonomic Information System (ITIS).
  7. ↑ Gamochaeta. Flora of China.
  8. ↑ Freire, S. E. and E. Urtubey. (2013). Gamochaeta beckii (Gnaphalieae, Asteraceae): A new species from Bolivia. Systematic Botany 38(1):259-265.
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