Eriophyllum

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Woolly sunflower
Eriophyllum confertiflorum 2003-04-07.jpg
E. confertiflorum
Voorhis Ecological Reserve
California State Polytechnic University, Pomona
Scientific classification
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Eriophyllum

Type species
Eriophyllum staechadifolium
Synonyms[2]
  • Trichophyllum Nutt.
  • Actinolepis DC.
  • Eremonanus I.M.Johnst.

Eriophyllum, commonly known as the woolly sunflower, is a North American genus of plants in the sunflower family. The genus is native to western North America (USA, Canada, northwestern Mexico), with a concentration of narrow endemics in California.[3][4][5]

Eriophyllum species are used as food plants by the larvae of some Lepidoptera species including Phymatopus californicus.

Description[edit]

Eriophyllum is an annual or perennial shrub or subshrub, some species growing to a height of 200 cm (6.7 feet). Leaves present generally alternate and entire to nearly compound, with woolly hairs on some of the species; the inflorescence contains numerous yellow flower heads in flat-topped clusters. The involucre structure is obconic to hemispheric. Phyllaries are either free or more or less fused; the receptacle presents typically flat, but naked; the ray flowers are present in some species but not in others. Fruits are angled in the outer flowers, but are generally club-shaped for the inner flowers; the pappus is somewhat jagged.[6][7]

Selected species

References[edit]

  1. ^ lectotype designated by Constance, Univ. Calif. Publ. Bot. 18: 69. 2 Apr 1937.
  2. ^ Flann, C (ed) 2009+ Global Compositae Checklist
  3. ^ Lagasca y Segura, Mariano. 1816. Genera et species plantarum 28
  4. ^ Tropicos, Eriophyllum Lag.
  5. ^ Biota of North America Program 2013 county distribution maps
  6. ^ Mooring, Madroño 38:213–226, (1991)
  7. ^ Flora of North America Eriophyllum Lagasca