familyAsteraceae
tribeAsteraceae tribe Heliantheae
subtribeAsteraceae (tribe Heliantheae) subtribe Helianthinae
genusHelianthus
speciesHelianthus pauciflorus
subspeciesHelianthus pauciflorus subsp. pauciflorus

Helianthus pauciflorus subsp. pauciflorus

Edward E. Schilling
Common names: Stiff sunflower hélianthe rigide
Endemic
Synonyms: Helianthus laetiflorus var. rigidus (Cassini) Fernald Helianthus rigidus (Cassini) Desfontaines
Treatment appears in FNA Volume 21. Treatment on page 161. Mentioned on page 156, 160.

Plants 80–200 cm. Leaves usually alternate distally; blades oblong-lanceolate to lanceovate, 8–27 cm, apices acuminate.


Phenology: Flowering late summer–fall.
Habitat: Dry to moderately wet prairies, open places
Elevation: 50–600+ m

Distribution

V21-386-distribution-map.gif

Alta., B.C., Man., Ont., P.E.I., Que., Sask., Ark., Conn., Ga., Ill., Ind., Iowa, Kans., Ky., Maine, Mass., Mich., Minn., Mo., Mont., Nebr., N.H., N.J., N.Dak., Okla., R.I., S.Dak., Tex., Vt., Va., Wis.

Discussion

Subspecies pauciflorus is introduced in Ontario, and probably in all eastern Canada.

Selected References

None.

Lower Taxa

None.
... more about "Helianthus pauciflorus subsp. pauciflorus"
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2n chromosome quantity
102 +
Abaxial face pubescence
glabrate +  and hispid +
Anther base shape
not tailed +, rounded +  and obtuse +
Anther coloration
dark +
Anther dehiscence
introrse +
Anther fusion
connate +
Anther theca coloration
pale +  and dark +
Apex fusion
connate +  and distinct +
Apex growth form or texture
herbaceous +
Apex shape
acuminate +
Apex size
subequal +
Apex texture
scarious +
Apical appendage presence
absent +
Apical appendage shape
usually ovate +  and lanceolate +
Appendage coloration
dark +
Appendage pubescence
hirsute +
Appendage relief
papillate +
Appendage shape
usually deltate +  and lanceolate +
Array architecture
spiciform +, paniculiform +  and corymbiform +
Array development
indeterminate +  and determinate +
Author
Edward E. Schilling +
Authority
Nuttall +
Band architecture
continuous +
Band quantity
1 +
Base shape
cuneate +
Blade architecture
3-nerved +
Blade length
5 cm50 mm <br />0.05 m <br /> (27 cm270 mm <br />0.27 m <br />) +
Blade shape
oblong-lanceolate;lanceovate +
Blade some measurement
8 cm80 mm <br />0.08 m <br /> (27 cm270 mm <br />0.27 m <br />) +
Blade width
2 cm20 mm <br />0.02 m <br /> (6 cm60 mm <br />0.06 m <br />) +
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) +
Common name
Stiff sunflower +  and hélianthe rigide +
Corolla architecture
zygomorphic +
Corolla coloration
reddish +  and yellow +
Corolla some measurement
0.65 cm6.5 mm <br />0.0065 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
Cypsela architecture
monomorphic +
Cypsela architecture or shape
beaked +
Cypsela growth form
dimorphic +
Cypsela pubescence
glabrate +
Cypsela shape
compressed +  and obpyramidal +
Cypsela some measurement
5mm;6mm +
Disc-floret atypical quantity
15 (30) +
Disc-floret quantity
30 (150) +
Disc-floret reproduction
fertile +  and bisexual +
Disc floret architecture
staminate +
Disc floret reproduction
fertile +  and bisexual +
Distribution
Alta. +, B.C. +, Man. +, Ont. +, P.E.I. +, Que. +, Sask. +, Ark. +, Conn. +, Ga. +, Ill. +, Ind. +, Iowa +, Kans. +, Ky. +, Maine +, Mass. +, Mich. +, Minn. +, Mo. +, Mont. +, Nebr. +, N.H. +, N.J. +, N.Dak. +, Okla. +, R.I. +, S.Dak. +, Tex. +, Vt. +, Va. +  and Wis. +
Elevation
50–600+ m +
Embryo course
straight +
Face pubescence
hairy +  and glabrous +
Filament fusion
distinct +
Floret architecture
pistillate +, staminate +  and neuter +
Floret atypical quantity
5;15 +
Floret position
proximal +
Floret quantity
1;5 +
Floret reproduction
bisexual +
Fruit architecture
winged +  and beaked +
Fruit condition or texture
dry +
Fruit density
dispersed +
Glomerule arrangement
singly +
Habitat
Dry to moderately wet prairies, open places +
Head architecture or arrangement
radiate +
Head architecture or shape
discoid +
Head arrangement
in more or less corymbiform , paniculiform or spiciform , arrays +  and singly +
Head development
indeterminate +
Head quantity
1;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
1.5 cm15 mm <br />0.015 m <br /> (2.3 cm23 mm <br />0.023 m <br />) +
Involucre position relational
surrounding +
Involucre shape
hemispheric +
Lamina some measurement
2 cm20 mm <br />0.02 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
Leaf architecture
sessile +  and petiolate +
Leaf arrangement
alternate +
Leaf position
basal +
Line quantity
2 +
Lobe atypical quantity
3 (5) +
Lobe coloration
yellow;reddish +
Lobe quantity
5 (?) +
Lobe shape
triangular +
Margin architecture or shape
serrate +  and entire +
Margin shape
serrate +  and subentire +
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 +
Palea shape
shallowly 3-toothed;subentire +
Palea some measurement
0.9 cm9 mm <br />0.009 m <br /> (1 cm10 mm <br />0.01 m <br />) +
Pappus duration
persistent +
Pappus life cycle
falling +
Pappus presence
absent +
Pappus quantity
1 +  and 4 +
Pappus shape
coroniform +
Peduncle some measurement
3 cm30 mm <br />0.03 m <br /> (12 cm120 mm <br />0.12 m <br />) +
Pericarp fragility
tough +
Pericarp width
thick +
Peripheral floret presence
absent +
Peripheral floret quantity
In 1 (3+ series) +
Petal fusion
connate +
Petiole some measurement
0 cm0 mm <br />0 m <br /> (1 cm10 mm <br />0.01 m <br />) +
Phenology
Flowering late summer–fall. +
Phyllary atypical quantity
45 (100) +
Phyllary duration
persistent +
Phyllary fusion
distinct +
Phyllary length
0.6 cm6 mm <br />0.006 m <br /> (1 cm10 mm <br />0.01 m <br />) +
Phyllary life cycle
falling +
Phyllary quantity
25 +  and 35 +
Phyllary shape
Ovate (?) +
Phyllary size
unequal +
Phyllary texture
Herbaceous (Chartaceous) +
Phyllary width
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
Publication title
Gen. N. Amer. Pl. +
Publication year
1818 +
Ray-floret architecture
neuter +
Ray-floret atypical quantity
30 (100) +
Ray-floret presence
absent +
Ray-floret quantity
10 (20) +
Ray-floret reproduction
sterile +
Receptacle architecture
paleate +
Receptacle pubescence
bearing subulate enations +, hairy +  and bristly +
Receptacle shape
flat;slightly convex +
Reference
None +
Root texture
fibrous +
Scale architecture or relief
erose +
Scale atypical quantity
2 (3) +
Scale height or length or size
shorter +
Scale quantity
2 +
Scale shape
aristate +
Scale some measurement
0.45 cm4.5 mm <br />0.0045 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
Seed architecture
exalbuminous +
Seed quantity
1 +
Sepal variability
modifed +
Series atypical quantity
1 (2) +
Series quantity
2;3 +
Smaller scale shape
aristate +
Smaller scale some measurement
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
Source xml
https://bibilujan@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/84153f6d59a0a91d69695978a64cee7560374f8e/V19-20-21/V21 386.xml +
Special status
Endemic +
Stamen arrangement
alternate +
Stamen atypical quantity
4 (5) +
Stamen quantity
5 +
Stem architecture
branched +
Stem growth form
procumbent +  and decumbent +
Stem orientation
erect +
Stem pubescence
scabro-hispid +
Stigmatic papilla architecture
continuous +
Style-branch architecture
appendaged +  and truncate +
Style architecture
2-branched +
Style pubescence
hirsutulous +  and glabrous +
Style quantity
1 +
Style relief
papillate +
Synonyms
Helianthus laetiflorus var. rigidus +  and Helianthus rigidus +
Taxon family
Asteraceae +
Taxon name
Helianthus pauciflorus subsp. pauciflorus +
Taxon parent
Helianthus pauciflorus +
Taxon rank
subspecies +
Throat shape
campanulate +
Throat variability
equaling +
Tube height or length or size
shorter +
Ultimate margin shape
toothed +  and entire +
Volume
Volume 21 +
Whole-organism atypical some measurement
300 cm3,000 mm <br />3 m <br /> (500 cm5,000 mm <br />5 m <br />) +
Whole-organism duration
perennial +
Whole-organism some measurement
50 cm500 mm <br />0.5 m <br /> (200 cm2,000 mm <br />2 m <br />) +
Whole organism atypical some measurement
2 cm20 mm <br />0.02 m <br /> (20 cm200 mm <br />0.2 m <br />) +
Whole organism growth form
plant +
Whole organism some measurement
80cm (200cm) +
X chromosome quantity
17 +