Flower, Weed
winged plumeless thistle
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.
Light brown with dark brown longitudinal lines
Smooth, glossy, transverseTransverse:
Set crosswise, crossing or at right angles.
wavy lines
Large style surrounded by brown collar.
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. are oblong to ellipticElliptic:
Outline of an ellipse; greatest width midway sloping to an equally pointed apex and base.
, compressed; outer 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. dull, grayish-brown; inner 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. glossy, tan to light brown with numerous brown longitudinal lines, surface appearing pebbled. ApicalApical:
The distal end of the fruit or seed away from the point of attachment or attachment scar.
rim brown, horizontal. Style base broad, cylindrical. Attachment scar basalBasal:
The base of the fruit or seed opposite the apical end.
or slightly oblique. PappusPappus:
Modified calyx in Asteraceae, composed of hairs, bristles, awns, or scales. The pappus-like structure attached to milkweed seeds is termed a coma. 
deciduous.
The 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. of the Carduus species are quite similar and difficult to identify.
State Noxious Weed: California, Delaware, Hawaii, Maryland, Tennessee, Oregon, West Virginia, Virginia
Not included
Asteraceae
Carduus tenuiflorus W. Curtis
