|
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] |