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Yellow Starthistle
(Centaurea solstitialis L.)
| Growth Habit: Annual,
erect, rigid branching stems. |
| Leaves: Basal leaves
deeply lobed, upper leaves not lobed, small, sharply pointed. |
| Stems: Rigid, covered
with a cottony fiber, to 30 inches tall, winged structures. |
| Flower: Yellow,
terminal, flower bracts are tipped with straw-colored, 3/4 inch thorn. |
| Roots: Taproot. |
| Seeds: Smooth,
light-colored, often darker mottled, 1/8 inch long, notched just above the base. |
| Other: Causes
"chewing disease" in horses. |
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