Crepis modocensis

Crepis modocensis is a species of flowering plant in the daisy family known by the common name Modoc hawksbeard.

Crepis modocensis
Crepis modocensis in Wenas Wildlife Area
Scientific classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Asterids
Order: Asterales
Family: Asteraceae
Tribe: Cichorieae
Genus: Crepis
Species:
C. modocensis
Binomial name
Crepis modocensis
Synonyms[1]
  • Crepis scopulorum Coville
  • Psilochenia modocensis (Greene) W.A.Weber
  • Crepis glareosa Piper, syn of subsp. glareosa
  • Crepis rostrata Coville, syn of subsp. rostrata
  • Crepis subacaulis (Kellogg) Coville, syn of subsp. rostrata '
The flower heads are large with 10 to 60 ray florets.

It is native to western North America (British Columbia, Washington, Oregon, California, Nevada, Utah, Idaho, Montana, Wyoming, Colorado), where it grows in several types of mountain and plateau habitat, including sagebrush.[2][3]

The species name is from the Modoc Plateau, in the northeast California range.

Description

Crepis modocensis is a perennial herb growing an erect stem up to 45 centimeters (18 inches) tall and often lined with long bristles. The woolly and sometimes bristly leaves are dark-veined and edged with blunt and sharp lobes. The longest leaves at the base of the plant reach about 25 centimeters (10 inches) long.

The inflorescence bears one to ten flower heads with rough or bristly phyllaries and up to 60 yellow ray florets but no disc florets.

The fruit is an achene around a centimeter long which is black, sometimes green or red tinted, and sports a tufty white pappus.[4]

Subspecies[1][4]
  • Crepis modocensis subsp. glareosa (Piper) Babc. & Stebbins – Kittitas County in Washington
  • Crepis modocensis subsp. modocensis – most of species range
  • Crepis modocensis subsp. rostrata (Coville) Babc. & Stebbins – British Columbia, Washington
  • Crepis modocensis subsp. subacaulis (Kellogg) Babc. & Stebbins – California, Montana, Nevada, Oregon

References
  1. The Plant List, Crepis modocensis Greene
  2. Biota of North America Program 2014 county distribution map
  3. Calflora taxon report, University of California, Crepis modocensis E. Greene, Modoc hawksbeard
  4. Flora of North America, Crepis modocensis


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