 |
plants with fibrous roots; NOT with a
taproot |
 |
juice watery; NOT milky |
 |
leaves alternate or basal; NOT opposite |
 |
leaves simple; NOT pinnatifid, NOT
divided |
 |
leaves never spinescent |
 |
heads small and numerous, in terminal
or axillary clusters; NOT [usually solitary at ends of branches] |
 |
involucral bracts in 2 or more series;
NOT [in one series, sometimes with a few much shorter outer ones at the
base] |
 |
involucral bracts well imbricated; NOT
scarcely imbricated |
 |
receptacle naked |
 |
flower heads with both tubular and ray
florets |
 |
ligulate flowers pistillate or neuter;
NOT perfect |
 |
ray florets yellow; NOT [pink, blue,
purple, or white] |
 |
stamens united to form a tube around
the pistil |
 |
pappus composed of hairs; NOT scales,
NOT bristles, NOT firm awns, NOT a crown, NOT absent, pappus NOT chaffy |
 |
pappus single, hairs sometimes unequal
but not distinctly divided into an inner and outer series of two
lengths; NOT [pappus double, hairs of the outer series inconspicuous,
distinctly shorter than the inner] |