| Tragopogon | genus of Old World herbs with linear entire leaves and yellow or purple flower heads |
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| Tragopogon | European perennial naturalized throughout United States having hollow stems with a few long narrow tapered leaves and each bearing a solitary pale yellow flower |
| Tragopogon | Mediterranean biennial herb with long-stemmed heads of purple ray flowers and milky sap and long edible root |
| Tragopogon | weedy European annual with yellow flowers |