Flower, Weed
Riddell's goldenrod
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.
Oblanceolate
Light brown
Smooth with longitudinal lines
Indentation below pappusPappus:
Modified calyx in Asteraceae, composed of hairs, bristles, awns, or scales. The pappus-like structure attached to milkweed seeds is termed a coma. 
crown present.
BasalBasal:
The base of the fruit or seed opposite the apical end.
end with an elongate attachment. Some pappusPappus:
Modified calyx in Asteraceae, composed of hairs, bristles, awns, or scales. The pappus-like structure attached to milkweed seeds is termed a coma. may be attached.
Not listed
Not included
Asteraceae
Oligoneuron riddellii (Frank ex Riddell) Rydb.
Solidago riddellii Frank ex Riddell
