 |
NOT [plants annual, of marshy or aquatic
habitats, densely villous throughout, tips of the involucral bracts not
bearded or black] (FOA) |
|
perennial plants, usually with
rootstocks; NOT [annual plants with taproots] |
|
plants with an abruptly shortened,
button-like caudex; NOT [plants rhizomatous] (FOA) |
|
plants pubescent, sometimes sparsely; NOT
[plants glabrous (at least by flowering) (FOA) |
|
leaves all or mostly subentire to
dentate; NOT [leaves all or mostly coarsely lobed to pinnately divided]
(BF) |
|
leaves denticulate to entire; NOT [leaves
irregularly toothed] (FOA) |
|
stem leaves different from basal leaves;
NOT [stem leaves and basal leaves equal in size and shape] (BF) |
|
lower leaves usually distinctly
petiolate; NOT [lower leaves not distinctly petiolate] (FOA) |
|
lower leaves mostly lanceolate to ovate
or suborbicular; NOT [lower leaves mostly linear to lanceolate] (FOA) |
|
middle and upper stem leaves much reduced
in size, largest at base; NOT [middle and upper stem leaves as large as
or slightly smaller than lower leaves] (BF), NOT [stem leaves not
reduced in size upwards, largest leaves often about the middle] (FOA) |
|
inflorescence mostly terminal; NOT
[inflorescence mostly axillary] (BF) |
|
flower heads few to many; NOT [flower
heads solitary] (BF), NOT [with a small head at base] (BF) |
|
axillary peduncles short; NOT [axillary
peduncles long] (BF) |
|
involucral bracts black-tipped, sometimes
only the outer; NOT [involucral bracts not black-tipped] (FOA) |
|
heads with rays; NOT [heads rayless or
rays minute, the heads appearing rayless] (FOA) |
