Weed
Tyrol knapweed, meadow knapweed
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.
ObovateObovate:
Inverted egg shaped with apical end the broadest.
Brown
Smooth with longitudinal lines
HilumHilum:
The scar on the seed coat at the place of its detachment from the seed stalk (funiculus).
lateral to the base
ApicalApical:
The distal end of the fruit or seed away from the point of attachment or attachment scar.
crown is approximately 1.0 mm wide.
State Noxious Weed: Arizona, Washington
Not included
Asteraceae
Centaurea nigrescens Willd.
Centaurea debeauxii Gren. & Godr. ssp. thuillieri Dostál
Centaurea dubia Suter ssp. vochinensis (Bernh. ex Rchb.) Hayek
Centaurea pratensis Thuill., non Salisb., nom. illeg.
Centaurea vochinensis Bernh. ex Rchb.
