Xylorhiza confertifolia

Xylorhiza confertifolia, common name Henrieville woody-aster, is a rare species of flowering plant in the family Asteraceae, known only from Garfield and Kane counties in southern Utah. The common name for the species refers to the Town of Henrieville, in Garfield County. It grows on barren alkaline slopes and in open pinyon-juniper woodlands at elevations of 1,400–2,300 m (4,600–7,500 ft).[3]

Henrieville woody-aster
Scientific classification
Kingdom:
Plantae
(unranked):
Angiosperms
(unranked):
Eudicots
(unranked):
Asterids
Order:
Asterales
Family:
Asteraceae
Tribe:
Astereae
Genus:
Xylorhiza
Species:
X. confertifolia
Binomial name
Xylorhiza confertifolia
(Cronquist) T.J. Watson
Synonyms[1][2]
  • Machaeranthera confertifolia (Cronquist) Cronquist
  • Machaeranthera glabriuscula var. confertifolia Cronquist

Xylorhiza confertifolia is a subshrub up to 20 cm (7.9 in) tall. Leaves are very narrow and linear, generally less than 2.5 mm (0.098 in) across. Flower heads are borne singly, with white ray and yellow disc flowers.[4][5][6]

References
  1. Tropicos
  2. The Plant List
  3. Flora of North America v 20 p 408.
  4. Cronquist, Arthur John. 1963. Two new varieties in Machaeranthera. Leaflets of Western Botany 10(1): 11–13..
  5. Watson, Thomas J. Brittonia 29(2): 207. 1977.
  6. Cronquist, Arthur John. Intermountain Flora 5: 274. 1994.
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