Scientific NameTragopogon dubius
Other Common Names:
Synonyms (former Scientific Names):
Tragopogon dubius ssp. major
Reproducing only by seed, seedlings have hairless arched grass-like cotyledons. The hairless 1 m stems arise from a deep fleshy taproot and all parts contain a milky white juice.
Stalkless grass-like leaves are 5-30 cm long and clasp the stem. The fleshy, bluish green leaves are hairless.
7-10 cm diameter globe-like fruiting head, grass-like leaves and milky juice distinguish this plant.
Flower Seed Head
Single flower heads follow the sun through the morning, closing mid-afternoon and on cloudy days. Yellow ray florets surrounded by a single row of 10-14 floral bracts longer than the ray florets make up the flower heads.
Each flower head produces a globe shaped fruiting head measuring 7-10 cm across. Each floret yields a single-seeded achene 25-35 mm long with a pappus of feathery webbed hairs. Dull brown and spindle shaped, the seeds are 2.3-3 cm long.. Each specimen may produce as many as 500 seeds.
Throughout Canada and the United States, goat's-beard is often a concern in fall seed crops due to the basal rosette of leaves produced by its biennial phase of life. Goat's-beard also frequents roadsides and waste areas.
upright and nonwoody
Thorns or Spines
Approximate Flower Diameter
Dominant Flower Color
shorter than leaf
Stem Cross Section
round or oval