Flower
garden cornflower
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.
Oblong
Blue-gray with yellow longitudinal lines, collar, and base
Smooth
PappusPappus:
Modified calyx in Asteraceae, composed of hairs, bristles, awns, or scales. The pappus-like structure attached to milkweed seeds is termed a coma. 
with dense bristles; scar slightly oblique and large.
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. oblong, compressed; smooth, glossy, sparsely pubescentPubescent:
Having hairs.
, blue-gray with various amounts of light longitudinal lines, area around scar yellow. ApicalApical:
The distal end of the fruit or seed away from the point of attachment or attachment scar.
rim white to yellow, horizontal. PappusPappus:
Modified calyx in Asteraceae, composed of hairs, bristles, awns, or scales. The pappus-like structure attached to milkweed seeds is termed a coma. of dense narrow scales, brush-like, uneven, erect, tan to reddish-brown, persistent. Scar laterally-oblique, opening one-third the length of the 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..
State Noxious Weed: Arizona, North Carolina
Included
For more information, see ISMA fact sheet.
Asteraceae
Centaurea cyanus L.
Leucacantha cyanus (L.) Nieuwl. & Lunell
