familyAsteraceae
tribeAsteraceae tribe Heliantheae
subtribeAsteraceae (tribe Heliantheae) subtribe Hymenopappinae
genusHymenopappus
speciesHymenopappus filifolius
varietyHymenopappus filifolius var. megacephalus

Hymenopappus filifolius var. megacephalus

B. L. Turner

Rhodora 58: 227, fig. 36. 1956.

John L. Strother
Endemic
Treatment appears in FNA Volume 21. Treatment on page 313. Mentioned on page 312.

Stems 30–70 cm. Leaves: basal axils ± densely tomentose, terminal lobes 5–30 mm; cauline (1–) 2–6. Heads 3–10 (–14). Peduncles 2–10 cm. Phyllaries 8–12 (–14) mm. Florets 25–60; corollas yellowish, 4–7 mm, throats 2–5 mm, lengths 2–5+ times lobes; anthers 3–4 mm. Cypselae 5–7 mm, hairs 1–2 mm; pappi (1–) 1.5–3 mm. 2n = 34.


Phenology: Flowering May–Nov.
Habitat: Sands, gravels
Elevation: 300–1700 m

Distribution

V21-763-distribution-map.gif

Ariz., Calif., Colo., Nev., Utah.

Discussion

Selected References

None.

Lower Taxa

None.
... more about "Hymenopappus filifolius var. megacephalus"
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2n chromosome quantity
34 +
Anther base shape
not tailed +, rounded +  and obtuse +
Anther dehiscence
introrse +
Anther fusion
connate +
Anther some measurement
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
Anther theca coloration
pale +
Apex fusion
connate +  and distinct +
Apex growth form or texture
herbaceous +
Apex size
subequal +
Apex texture
scarious +
Apical appendage presence
absent +
Apical appendage shape
usually ovate +  and lanceolate +
Appendage pubescence
hirsute +
Appendage relief
papillate +
Appendage shape
usually deltate +  and lanceolate +
Array architecture
corymbiform +
Array development
indeterminate +  and determinate +
Author
John L. Strother +
Authority
B. L. Turner +
Band architecture
continuous +
Band quantity
1 +
Basal axil pubescence
tomentose +
Basal leaf architecture or shape
2-pinnate +
Basal leaf some measurement
3 cm30 mm <br />0.03 m <br /> (20 cm200 mm <br />0.2 m <br />) +
Base shape
decurrent +
Blade architecture
compound +  and simple +
Blade shape
toothed +
Blade size or quantity
1-2+ times pinnately lobed ultimate margins usually entire +
Body architecture
winged;ribbed;winged;ribbed +
Body architecture or pubescence or relief
smooth +
Body relief
tuberculate +  and rugose +
Bractlet quantity
1;15 +
Branch arrangement or course or shape
linear +
Branch structure in adjective form
stigmatic +
Bristle architecture
barbellulate +  and barbellate +
Bristle shape
Plumose (?) +
Calyculus presence
absent +
Calyculus quantity
Of 1 (15+ bractlets) +
Cauline leaf atypical quantity
1 (2) +
Cauline leaf quantity
2 (?) +  and 6 (?) +
Corolla architecture
zygomorphic +
Corolla coloration
yellowish +
Corolla some measurement
0.4 cm4 mm <br />0.004 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
Cypsela architecture
monomorphic +
Cypsela architecture or shape
12-16-ribbed +
Cypsela growth form
dimorphic +
Cypsela pubescence
less hirtellous +  and villous +
Cypsela shape
obpyramidal +
Cypsela some measurement
5mm;7mm +
Disc-floret quantity
10 (80) +
Disc-floret reproduction
fertile +  and bisexual +
Disc floret architecture
staminate +
Disc floret reproduction
fertile +  and bisexual +
Distribution
Ariz. +, Calif. +, Colo. +, Nev. +  and Utah. +
Elevation
300–1700 m +
Embryo course
straight +
Face pubescence
tomentose +, hairy +  and glabrous +
Filament fusion
distinct +
Floret architecture
pistillate +, staminate +  and neuter +
Floret atypical quantity
5;15 +
Floret position
proximal +
Floret quantity
25;60 +
Floret reproduction
bisexual +
Fruit architecture
winged +  and beaked +
Fruit condition or texture
dry +
Fruit density
dispersed +
Glomerule arrangement
singly +
Habitat
Sands, gravels +
Hair some measurement
0.1 cm1 mm <br />0.001 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
Head architecture
discoid +  and radiate +
Head architecture or arrangement
radiate +
Head architecture or shape
discoid +
Head arrangement
aggregated +
Head atypical quantity
10 (14) +
Head development
indeterminate +
Head quantity
3;10 +
Head reproduction
homogamous +  and heterogamous +
Illustration copyright
Flora of North America Association +
Illustrator
Marjorie C. Leggitt +
Individual head architecture
each +  and sessile +
Involucre diameter
0.4 cm4 mm <br />0.004 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
Involucre position relational
surrounding +
Involucre shape
obconic;hemispheric +
Leaf architecture
petiolate +
Leaf arrangement
alternate +
Leaf position
cauline +  and basal +
Line quantity
2 +
Lobe atypical quantity
3 (5) +
Lobe atypical width
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
Lobe length
2mm (50mm) +
Lobe quantity
5 (?) +
Lobe shape
deltate +  and filiform +
Lobe width
0.05 cm0.5 mm <br />5.0e-4 m <br /> (?) +  and 0.2 cm2 mm <br />0.002 m <br /> (?) +
Margin architecture or shape
dentate to pinnatifid or palmatifid +  and entire +
Number of lower taxa
0 +
Ovary architecture
2-carpellate +
Ovary architecture or structure in adjective form
1-locular +
Ovary position
inferior +
Ovule fixation
attached +
Ovule orientation
anatropous +
Ovule quantity
1 +
Pappus atypical some measurement
0.1 cm1 mm <br />0.001 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
Pappus duration
persistent +
Pappus life cycle
falling +
Pappus presence
absent +
Pappus quantity
of 12 +  and 22 orbiculate to spatulate scales +
Pappus some measurement
0.15 cm1.5 mm <br />0.0015 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
Peduncle some measurement
2 cm20 mm <br />0.02 m <br /> (10 cm100 mm <br />0.1 m <br />) +
Pericarp fragility
tough +
Pericarp width
thick +
Peripheral floret presence
absent +
Peripheral floret quantity
In 1 (3+ series) +
Petal fusion
connate +
Phenology
Flowering May–Nov. +
Phyllary architecture
scarious-margined +
Phyllary atypical some measurement
1.2 cm12 mm <br />0.012 m <br /> (1.4 cm14 mm <br />0.014 m <br />) +
Phyllary coloration
Whitish (Yellowish) +
Phyllary duration
persistent +
Phyllary fusion
distinct +
Phyllary length
0.3 cm3 mm <br />0.003 m <br /> (1.4 cm14 mm <br />0.014 m <br />) +
Phyllary life cycle
falling +
Phyllary quantity
5 +  and 13 +
Phyllary size
subequal +
Phyllary some measurement
0.8 cm8 mm <br />0.008 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
Phyllary texture
Membranous (?) +
Phyllary width
0.2 cm2 mm <br />0.002 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
Publication title
Rhodora +
Publication year
1956 +
Ray-floret architecture
pistillate +
Ray-floret presence
absent +
Ray-floret quantity
8 (?) +
Ray-floret reproduction
fertile +
Receptacle architecture
epaleate +
Receptacle pubescence
bearing subulate enations +, hairy +  and bristly +
Receptacle shape
convex;flat +
Reference
None +
Root texture
fibrous +
Scale quantity
12 +  and 22 +
Scale shape
orbiculate +  and spatulate +
Scale some measurement
0.01 cm0.1 mm <br />1.0e-4 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
Seed architecture
exalbuminous +
Seed quantity
1 +
Sepal variability
modifed +
Series atypical quantity
1 (2) +
Series quantity
2;3 +
Source xml
https://bibilujan@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/84153f6d59a0a91d69695978a64cee7560374f8e/V19-20-21/V21 763.xml +
Special status
Endemic +
Stamen arrangement
alternate +
Stamen atypical quantity
4 (5) +
Stamen quantity
5 +
Stem orientation
erect +
Stem shape
scapiform +
Stem some measurement
30 cm300 mm <br />0.3 m <br /> (70 cm700 mm <br />0.7 m <br />) +
Style-branch architecture
appendaged +  and truncate +
Style architecture
2-branched +
Style pubescence
hirsutulous +  and glabrous +
Style quantity
1 +
Style relief
papillate +
Synonyms
Compositae +
Taxon family
Asteraceae +
Taxon name
Hymenopappus filifolius var. megacephalus +
Taxon parent
Hymenopappus filifolius +
Taxon rank
variety +
Terminal lobe some measurement
0.5 cm5 mm <br />0.005 m <br /> (3 cm30 mm <br />0.03 m <br />) +
Throat length
2-5+ times lobes +
Throat shape
campanulate +
Throat some measurement
0.2 cm2 mm <br />0.002 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
Throat variability
equaling +
Tube length or size
longer +
Tube some measurement
0.1 cm1 mm <br />0.001 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
Ultimate margin shape
toothed +  and entire +
Volume
Volume 21 +
Whole-organism atypical some measurement
5 cm50 mm <br />0.05 m <br /> (20 cm200 mm <br />0.2 m <br />) +
Whole-organism duration
perennial +
Whole-organism some measurement
5 cm50 mm <br />0.05 m <br /> (10 cm100 mm <br />0.1 m <br />) +
Whole organism growth form
tree +, shrub +  and subshrub +
X chromosome quantity
17 +