Flower, Weed
Bigelow's tansyaster
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 yellow
Striate and granularGranular:
Resembling or consisting of small grains or particles.
ApexApical:
The distal end of the fruit or seed away from the point of attachment or attachment scar.
has an expanded 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
Diagonal callusCallus:
The hard base of grass florets or spikelets, just above the point of disarticulation.
at base.
Not listed
Not included
Asteraceae
Dieteria bigelovii (A. Gray) D.R. Morgan & R.L. Hartm.
Aster aquifolius (Greene ex Wooton & Standl.) S.F. Blake
Aster bigelovii A. Gray
Aster pattersonii A. Gray
Aster rubrotinctus S.F. Blake
Machaeranthera aquifolia Greene ex Wooton & Standl
Machaeranthera centaureoides Greene ex Wooton & Standl
Machaeranthera pattersonii (A. Gray) Greene
Machaeranthera rubricaulis Rydb.
