Tragopogon dubius
Tragopogon dubius, commonly known as yellow salsify, is a species of salsify with yellow flower heads. It is native to Eurasia and has been introduced to North America.
Description
Like most salsifies, Tragopogon dubius grows as an annual or occasionally biennial forb, reaching a height of. The leaves are up to long.The buds are blue-green, tall, and tapered. On display from late spring to late summer, the yellow flower head is wide. The inflorescence opens early in the morning and often closes up by late afternoon. Later, the plant forms a seed head resembling that of dandelions, but distinctly larger.
The seeds are 2–4 cm long but featherweight, weighing about 8 mg each on average. There is some natural variation between the central and peripheral achenes in the seedhead, with the peripheral ones being generally darker and heavier, and having a higher concentration of phenolic compounds; this may enhance their survival potential.
Similar species
Similar species include the widespread T. pratensis, the bracts of which are shorter than the rays.Taxonomy
Although not particularly closely related to T. porrifolius or T. pratensis, T. dubius hybridises readily with both, and in North America its hybrids have given rise to the new alloploid hybrid species T. mirus and T. miscellus.Names
It has a synonym, Tragopogon major.Its common names include yellow salsify, western salsify, western goat's-beard, wild oysterplant, yellow goat's beard, meadow goat's beard, goat's beard, common salsify, and salsify. Some of these are also, perhaps more commonly, used for other species.
Distribution and habitat
It is native to southern and central Europe and western Asia and found as far north and west as northern France. Although it has been reported from Kashmir and India, recent evidence suggests that specimens from these areas may be a different species.It has been introduced into North America where it has become widespread, being reported from all the continental United States except for a few in the far southeast, and all provinces of Canada except Newfoundland and the northern territories.
It grows typically in fields and disturbed areas.
Uses
The edibility of wild western salsify is disputed. In The Medicinal and Poisonous Plants of Southern and Eastern Africa by Watt and Breyer-Brandwijk it is reported to be inedible. However, Stephen Facciola wrote in his book Cornucopia that the flowering stems, buds, leaves, shoots, and roots are all edible.Though purple salsify is also called oyster root, both western salsify and meadow salsify have roots that are much more strongly flavored, but that are both fibrous and bitter. Garden grown roots of all species are more easily eaten than wild harvested roots.