Weed
hardheads
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.
OvalOval:
Broadly elliptic.
to obovateObovate:
Inverted egg shaped with apical end the broadest.
, broad and compressed
Ivory and occasionally green or yellow tinged
Smooth
StylarStylar:
The end of the fruit or seed that contains the style or the apical end.
lobe present.
ObovateObovate:
Inverted egg shaped with apical end the broadest., semi-compressed longitudinally. Margin continually curved at both ends 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. with no angular shoulder at the stylarStylar:
The end of the fruit or seed that contains the style or the apical end. end. Immature seeds can be confused with Grindelia squarrosa.
State Noxious Weed: Alaska, Arizona, California, Colorado, Connecticut, Georgia, Hawaii, Idaho, Illinois, Iowa, Kansas, Louisiana, Michigan, Minnesota, Montana, Nebraska, New Mexico, Nevada, North Dakota, Ohio, Oklahoma, Oregon, South Dakota, South Carolina, Texas, Utah, Washington, Wisconsin, Wyoming
Learn more on ITP's Federal Noxious Weed Disseminules tool.
Included
Asteraceae
Rhaponticum repens (L.) Hidalgo
Centaurea repens L.
Acroptilon repens (L.) D.C.
