Helenium amarum var. amarum
Treatment appears in FNA Volume 21. Treatment on page 428.
Plants (10–) 20–60 (–100) cm. Leaves: basal and proximal cauline usually withered by flowering; basal blades linear to ovate, usually entire or pinnately toothed sometimes pinnatifid; proximal blades usually linear, usually entire, sometimes pinnately toothed. Ray corollas 6.5–14 × 4–10 mm. Disc-florets 75–150+; corollas yellow to yellowbrown distally, 2–2.7 mm. Cypselae 0.9–1.3 mm; pappi of 6–8 scales 1.2–1.8 mm. 2n = 30.
Phenology: Flowering (Feb–)Jul–Oct(–Dec)
Habitat: Roadsides and fields
Elevation: 20–400 m
Distribution
Ala., Ark., Calif., D.C., Fla., Ga., Ind., Kans., La., Mich., Miss., Mo., N.C., Okla., Pa., S.C., Tenn., Tex., Va.
Discussion
Variety amarum is introduced in California.
Selected References
None.
Lower Taxa
None.
... more about "Helenium amarum var. amarum"
introrse +
connate +
herbaceous +
scarious +
absent +
hirsute +
papillate +
paniculiform +
continuous +
decurrent +
pinnatifid;lobed;spatulate;ovate;spatulate;ovate;oblong;oblanceolate;linear;lanceolate;elliptic +
winged;ribbed;winged;ribbed +
1;15 +
stigmatic +
35;150 +
absent +
zygomorphic +
monomorphic +
dimorphic +
hairy +
0.9mm;1.3mm +
staminate +
staminate +
straight +
gland-dotted +
distinct +
proximal +
1;5 +
bisexual +
dispersed +
corymbiform +
singly +
singly +
indeterminate +
10;150 +
surrounding +
globoid;hemispheric;globose +
alternate +
withered +
deltate +
2-carpellate +
inferior +
attached +
anatropous +
persistent +
falling +
hairy +
tough +
thick +
absent +
connate +
persistent +
distinct +
falling +
hairy +
unequal +
toothed +
Rhodora +
1957 +
pistillate +
absent +
fertile +
epaleate +
pitted +
ovoid;hemispheric;ovoid;hemispheric;globose;conic +
fibrous +
entire +
absent +
aristate +
exalbuminous +
modifed +
alternate +
erect +
2-branched +
papillate +
Helenium amarum var. amarum +
Helenium amarum +
variety +
shorter +
dilated +
equaling +
annual +