Weed
prairie sunflower, showy sunflower
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.
Gray with black mottling
Smooth and pubescentPubescent:
Having hairs.
Small apicalApical:
The distal end of the fruit or seed away from the point of attachment or attachment scar.
collar
Helianthus petiolaris (on the right): 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. is obovateObovate:
Inverted egg shaped with apical end the broadest. and compressed. Markings similar to Helianthus annuus (wild) (center), but the size is somewhat smaller, and the pubescence is longer and conspicuous.
Not listed
Not included
Asteraceae
Helianthus petiolaris Nutt.
