Xanthisma paradoxum

Xanthisma paradoxum is a plant species native to the "Four Corners" region where Colorado, Arizona, New Mexico, and Utah meet. It is known only Montezuma County (Colorado), San Juan County (Utah), and Apache County (Arizona). The species is named for the Town of Paradox, Colorado, where the type specimen was collected. It grows in disturbed sites, washes, desert scrub, and open pinyon-juniper woodlands.[2][3]

Xanthisma paradoxum
Scientific classification
Kingdom:
Plantae
(unranked):
Angiosperms
(unranked):
Eudicots
(unranked):
Asterids
Order:
Asterales
Family:
Asteraceae
Tribe:
Astereae
Genus:
Xanthisma
Species:
X. paradoxum
Binomial name
Xanthisma paradoxum
(B.L. Turner & R.L. Hartm.) G.L. Nesom & B.L. Turner
Synonyms[1]
  • Haplopappus spinulosus var. paradoxus (B.L. Turner & R.L. Hartm.) Cronquist
  • Machaeranthera pinnatifida var. paradoxa B.L. Turner & R.L. Hartm.
  • Xanthisma spinulosum var. paradoxum (B.L. Turner & R.L. Hartm.) D.R. Morgan & R.L. Hartm.

Xanthisma paradoxum is a branching herb up to 15 cm (6 inches) high. It has deeply dissected basal leaves which are persistent and dense, plus narrow linear leaves on the lower half of the stems.[2][4]

References
  1. Tropicos
  2. Nesom, G.L. & B.L. Turner. 2007. Taxonomic review of the Xanthisma spinulosum complex (Asteraceae: Astereae). Phytologia 89:(3):371-389.
  3. Flora of North America v 20 p 393.
  4. Turner, Billie Lee, & Hartman, Ronald Lee. 1976. Infraspecific caterogies of Machaeranthera pinnatifida (Compositae). Wrightia 5(8): 308-315.
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