Xylothamia

Xylothamia, the desert goldenrods,[1] is a genus of flowering plants in the daisy family, Asteraceae.[2][3][4][5] Until 2003, it was held to contain nine species of shrubs native to deserts of Mexico and the southwestern United States.[6] However, it seems to contain at least two groups. Four species are related to Gundlachia and may be moved to that genus. The relationships of the other five species is not quite as clear. All nine species do belong in the subtribe Solidagininae.[6]

Xylothamia
Scientific classification
Kingdom:
Plantae
(unranked):
Angiosperms
(unranked):
Eudicots
(unranked):
Asterids
Order:
Asterales
Family:
Asteraceae
Tribe:
Astereae
Genus:
Xylothamia

Species

The following four species, including the type species Xylothamia triantha, are related to each other and to Gundlachia:[6]

The following three species are related to each other and to Bigelowia and Thurovia:[6]

  • Xylothamia pseudobaccharis
  • Xylothamia parrasana
  • Xylothamia purpusii

The following two species are related to each other:[6]

  • Xylothamia johnstonii
  • Xylothamia palmeri

References
  1. "Xylothamia". Natural Resources Conservation Service PLANTS Database. USDA. Retrieved 7 August 2015.
  2. Botanic Garden and Botanical Museum Berlin-Dahlem. "Details for: Astereae". Euro+Med PlantBase. Freie Universität Berlin. Retrieved 2009-07-18.
  3. UniProt. "Tribe Astereae". Retrieved 2009-07-18.
  4. National Herbarium of New South Wales. "Genus Kippistia". New South Wales FloraOnline. Royal Botanic Gardens, Sydney. Retrieved 2009-07-18.
  5. "Polyarrhena Cass". African Plants Database. South African National Biodiversity Institute, the Conservatoire et Jardin botaniques de la Ville de Genève and Tela Botanica. Retrieved 2009-07-18.
  6. Urbatsch, L. E.; Roberts, R. P.; Karaman, V. (2003). "Phylogenetic evaluation of Xylothamia, Gundlachia, and related genera (Asteraceae, Astereae) based on ETS and ITS nrDNA sequence data". American Journal of Botany. 90 (4): 634–49. doi:10.3732/ajb.90.4.634. PMID 21659159.


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