viper's grass

Từ điển WordNet v3.1 - WordNet Dictionary

noun

perennial south European herb having narrow entire leaves and solitary yellow flower heads and long black edible roots shaped like carrots
• Syn:
black salsify, scorzonera, Scorzonera hispanica
• Hypernyms:
herb, herbaceous plant
• Member Holonyms:
genus Scorzonera
• Part Meronyms:
scorzonera, black salsify