Weed
bull thistle
AcheneAchene:
A dry, hard, one-chambered, one-seeded indehiscent fruit, as in buckwheat (Fagopyrum) or sunflower (Helianthus). The fruit wall is not united with the seed coat.
Curved obovateObovate:
Inverted egg shaped with apical end the broadest.
Yellow with lots of black streaking and a yellow collar
Smooth
Strong stylarStylar:
The end of the fruit or seed that contains the style or the apical end.
knob
AchenesAchene:
A dry, hard, one-chambered, one-seeded indehiscent fruit, as in buckwheat (Fagopyrum) or sunflower (Helianthus). The fruit wall is not united with the seed coat. are ovateOvate:
Egg-shaped with basal end the broadest.
to obovateObovate:
Inverted egg shaped with apical end the broadest. and compressed, with one side being more curved than the other. Color yellow with various amounts of brown or black streaking, apicalApical:
The distal end of the fruit or seed away from the point of attachment or attachment scar.
rim clear yellow. StylarStylar:
The end of the fruit or seed that contains the style or the apical end. knob dominant. Scar basalBasal:
The base of the fruit or seed opposite the apical end.
.
State Noxious Weed: Arizona, California, Colorado, Michigan, Minnesota, Pennsylvania, West Virginia
Included
For more information, see ISMA fact sheet.
Asteraceae
Cirsium vulgare (Savi) Ten.
Carduus lanceolatus L.
Carduus vulgaris Savi
Cirsium lanceolatum (L.) Scop., non Hill
Cirsium lanceolatum (L.) Scop. var. hypoleucum DC.
