• Source: Scorzonera humilis

Scorzonera humilis, the viper's-grass, is a species of perennial plant. In Britain it is a rare plant, restricted to moist meadows, in Dorset and Warwick in England, and in South Wales.
One unique class of stilbenoid derivative was first isolated from S. humilis. They were named the tyrolobibenzyls after Tyrol in the eastern Alps, where the plant was collected.




Description


It differs from goat's-beard, Tragopogon pratensis, in that it has short, pale green bracts, whereas in Goats Beard they are long and pointed.
It grows 7 to 50 cm.
The leaves are unbranched, elliptical-lanceolate.
The flower heads are 2.5 cm wide, and deep yellow in colour. Flowers from May until July.
The achenes are smooth ribbed, beakless, with similar pappus to Tragopogon pratensis.
It exudes a milky juice from its stem.




References

Kata Kunci Pencarian:

• Flora Lebanon
• Scorzonera humilis
• Scorzonera
• Viper's grass
• Cassida panzeri
• Tragopogon pratensis
• Dihydrostilbenoid
• List of Asteraceae of Great Britain and Ireland
• Wild Flower Society (UK)
• List of vascular plants of the Karelian Isthmus
• List of plants from the mountains of Romania