Weed
common crupina
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.
Cylindrical, but tapered at the base
Black with a light colored band at the apexApical:
The distal end of the fruit or seed away from the point of attachment or attachment scar.
Smooth
The scar is lateral to the base; strong ring of black pappusPappus:
Modified calyx in Asteraceae, composed of hairs, bristles, awns, or scales. The pappus-like structure attached to milkweed seeds is termed a coma. 
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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. blunt and obovateObovate:
Inverted egg shaped with apical end the broadest.
, with a very conspicuous ring of black bristles for a pappusPappus:
Modified calyx in Asteraceae, composed of hairs, bristles, awns, or scales. The pappus-like structure attached to milkweed seeds is termed a coma. . The collar and stylarStylar:
The end of the fruit or seed that contains the style or the apical end.
lobe can be seen from above the pappusPappus:
Modified calyx in Asteraceae, composed of hairs, bristles, awns, or scales. The pappus-like structure attached to milkweed seeds is termed a coma. ring.
State Noxious Weed: California, Idaho, Nevada, Oregon, Utah, Wyoming
Federal
Learn more on ITP's Federal Noxious Weed Disseminules tool.
Not included
For more information, see ISMA fact sheet.
Asteraceae
Crupina vulgaris Cass.
