familyAsteraceae
tribeAsteraceae tribe Heliantheae
subtribeAsteraceae (tribe Heliantheae) subtribe Helianthinae
genusHelianthus
speciesHelianthus argophyllus

Helianthus argophyllus

Torrey & A. Gray

Fl. N. Amer. 2: 318. 1842.

Edward E. Schilling
Common names: Silverleaf sunflower
Endemic
Treatment appears in FNA Volume 21. Treatment on page 149. Mentioned on page 142.

Annuals, 100–300 cm. Stems (silvery white) erect, usually tomentose or floccose. Leaves mostly cauline; mostly alternate; petioles 2–10 cm; blades ovate to lanceovate, 15–25 × 10–20 cm, bases truncate to subcordate, margins entire or serrulate, abaxial faces usually floccose, sericeous, or tomentose, glanddotted. Heads 1–5. Peduncles 2–8 cm. Involucres hemispheric, 20–30 mm diam. Phyllaries 20–35, ovate to lanceovate, 15–18 × (2–) 5–8 mm, apices long-attenuate, abaxial faces usually densely white-villous, glanddotted. Paleae 10–11 mm, 3-toothed (apices glabrous or sparsely villous). Ray-florets 15–20; laminae 20–30 mm. Disc-florets 150+; corollas 6.5–7.5 mm, lobes reddish; anthers dark, appendages dark (style-branches reddish). Cypselae 4–6 mm, glabrate; pappi of 2 aristate scales 2–2.7 mm. 2n = 34.


Phenology: Flowering late summer–fall.
Habitat: Open areas, sandy soils
Elevation: 0–30+ m

Distribution

V21-346-distribution-map.gif

Fla., N.C., Tex., in South America (Argentina), Africa, Australia

Discussion

Helianthus argophyllus hybridizes naturally with H. annuus.

Selected References

None.

Lower Taxa

None.
... more about "Helianthus argophyllus"
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2n chromosome quantity
34 +
Abaxial face pubescence
white-villous +, tomentose +, sericeous +  and floccose +
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
long-attenuate +
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
Torrey & A. Gray +
Band architecture
continuous +
Band quantity
1 +
Base shape
truncate +  and subcordate +
Blade architecture
3-nerved +
Blade length
15 cm150 mm <br />0.15 m <br /> (25 cm250 mm <br />0.25 m <br />) +
Blade shape
ovate;lanceovate +
Blade width
10 cm100 mm <br />0.1 m <br /> (20 cm200 mm <br />0.2 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
Silverleaf sunflower +
Corolla architecture
zygomorphic +
Corolla coloration
reddish +  and yellow +
Corolla some measurement
0.65 cm6.5 mm <br />0.0065 m <br /> (0.75 cm7.5 mm <br />0.0075 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
4mm;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
Fla. +, N.C. +, Tex. +, in South America (Argentina) +, Africa +  and Australia +
Elevation
0–30+ 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
Open areas, sandy soils +
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;5 +
Head reproduction
homogamous +  and heterogamous +
Illustration copyright
Flora of North America Association +
Illustrator
Marjorie C. Leggitt +
Individual head architecture
each +  and sessile +
Involucre diameter
2 cm20 mm <br />0.02 m <br /> (3 cm30 mm <br />0.03 m <br />) +
Involucre position relational
surrounding +
Involucre shape
hemispheric +
Lamina some measurement
2 cm20 mm <br />0.02 m <br /> (3 cm30 mm <br />0.03 m <br />) +
Leaf architecture
sessile +  and petiolate +
Leaf arrangement
alternate +
Leaf position
cauline +
Line quantity
2 +
Lobe atypical quantity
3 (5) +
Lobe coloration
reddish +
Lobe quantity
5 (?) +
Lobe shape
triangular +
Margin architecture or shape
serrulate +  and entire +
Margin shape
lobed +
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
3-toothed +
Palea some measurement
1 cm10 mm <br />0.01 m <br /> (1.1 cm11 mm <br />0.011 m <br />) +
Pappus duration
persistent +
Pappus life cycle
falling +
Pappus presence
absent +
Pappus shape
coroniform +
Peduncle some measurement
2 cm20 mm <br />0.02 m <br /> (8 cm80 mm <br />0.08 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
2 cm20 mm <br />0.02 m <br /> (10 cm100 mm <br />0.1 m <br />) +
Phenology
Flowering late summer–fall. +
Phyllary atypical quantity
45 (100) +
Phyllary atypical width
0.2 cm2 mm <br />0.002 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
Phyllary duration
persistent +
Phyllary fusion
distinct +
Phyllary length
1.5 cm15 mm <br />0.015 m <br /> (1.8 cm18 mm <br />0.018 m <br />) +
Phyllary life cycle
falling +
Phyllary quantity
20 +  and 35 +
Phyllary shape
Ovate (Lanceovate) +
Phyllary size
unequal +
Phyllary texture
Herbaceous (Chartaceous) +
Phyllary width
0.5 cm5 mm <br />0.005 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
Publication title
Fl. N. Amer. +
Publication year
1842 +
Ray-floret architecture
neuter +
Ray-floret atypical quantity
30 (100) +
Ray-floret presence
absent +
Ray-floret quantity
15 (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
0.2 cm2 mm <br />0.002 m <br /> (0.27 cm2.7 mm <br />0.0027 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 346.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
floccose +  and tomentose +
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
Undefined (tribe Undefined) subtribe Lagasceinae +
Taxon family
Asteraceae +
Taxon name
Helianthus argophyllus +
Taxon parent
Helianthus +
Taxon rank
species +
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
annual +
Whole-organism some measurement
100 cm1,000 mm <br />1 m <br /> (300 cm3,000 mm <br />3 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
shrub +  and subshrub +
Whole organism some measurement
20cm (500cm) +
X chromosome quantity
17 +