familyAsteraceae
tribeAsteraceae tribe Heliantheae
subtribeAsteraceae (tribe Heliantheae) subtribe Ambrosiinae
genusIva
speciesIva annua

Iva annua

Linnaeus

Sp. Pl. 2: 988. 1753.

John L. Strother
Synonyms: Iva annua var. caudata (Small) R. C. Jackson Iva annua var. macrocarpa (S. F. Blake) R. C. Jackson
Treatment appears in FNA Volume 21. Treatment on page 27. Mentioned on page 25.

Annuals, (10–) 50–100 (–150+) cm. Stems erect. Leaves: petioles 5–20 (–30) mm; blades deltate or ovate to elliptic, trullate, or lanceolate, 30–100 (–150) + × 8–45 (–80) mm, margins ± toothed, faces ± scabrellous, glanddotted. Heads in ± spiciform arrays. Peduncles 0–1 mm. Involucres ± hemispheric, 3–4 (–5) mm. Phyllaries: outer 3–5 distinct, ± herbaceous. Paleae linear, 2–2.5 mm. Pistillate florets 3–5; corollas 0.5–1 mm. Functionally staminate florets 8–12+; corollas 2–2.5 mm. Cypselae 2–3 mm. 2n = 34.


Phenology: Flowering Jul–Nov.
Habitat: Disturbed sites, moist soils
Elevation: 10–500 m

Distribution

V21-46-distribution-map.gif

Ala., Ark., Colo., Fla., Ga., Ill., Ind., Iowa, Kans., Ky., La., Maine, Mass., Mich., Miss., Mo., Nebr., N.Mex., N.C., N.Dak., Ohio, Okla., Pa., S.C., S.Dak., Tenn., Tex., Va., W.Va., Wis., Mexico (Tamaulipas)

Discussion

Selected References

None.

Lower Taxa

None.
... more about "Iva annua"
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2n chromosome quantity
34 +
Anther base shape
not tailed +, rounded +  and obtuse +
Anther dehiscence
introrse +
Anther fusion
connate +
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
spiciform +
Array development
indeterminate +  and determinate +
Author
John L. Strother +
Authority
Linnaeus +
Band architecture
continuous +
Band quantity
1 +
Base shape
decurrent +
Blade architecture
compound +  and simple +
Blade atypical length
10 cm100 mm <br />0.1 m <br /> (15 cm150 mm <br />0.15 m <br />) +
Blade atypical width
4.5 cm45 mm <br />0.045 m <br /> (8 cm80 mm <br />0.08 m <br />) +
Blade length
3 cm30 mm <br />0.03 m <br /> (10 cm100 mm <br />0.1 m <br />) +
Blade shape
ovate;elliptic trullate or lanceolate +
Blade width
0.8 cm8 mm <br />0.008 m <br /> (4.5 cm45 mm <br />0.045 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) +
Corolla architecture
zygomorphic +
Corolla coloration
whitish +  and pinkish +
Corolla shape
tubular +
Corolla some measurement
0.2 cm2 mm <br />0.002 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
Cypsela architecture
monomorphic +
Cypsela architecture or pubescence or relief
smooth +
Cypsela architecture or shape
beaked +
Cypsela growth form
dimorphic +
Cypsela pubescence
hispidulous +
Cypsela relief
scabrellous +
Cypsela shape
obcompressed +, plumply obovoid +  and pyriform +
Cypsela some measurement
2mm;3mm +
Disc floret architecture
staminate +
Disc floret quantity
5 (60) +
Disc floret reproduction
fertile +  and bisexual +
Distribution
Ala. +, Ark. +, Colo. +, Fla. +, Ga. +, Ill. +, Ind. +, Iowa +, Kans. +, Ky. +, La. +, Maine +, Mass. +, Mich. +, Miss. +, Mo. +, Nebr. +, N.Mex. +, N.C. +, N.Dak. +, Ohio +, Okla. +, Pa. +, S.C. +, S.Dak. +, Tenn. +, Tex. +, Va. +, W.Va. +, Wis. +  and Mexico (Tamaulipas) +
Elevation
10–500 m +
Embryo course
straight +
Face pubescence
glabrous +
Face relief
scabrellous +
Filament fusion
distinct +
Floret architecture
staminate +  and pistillate +
Floret atypical quantity
5;15 +
Floret position
proximal +
Floret presence
absent +
Floret quantity
8;12 +
Floret reproduction
bisexual +
Fruit architecture
winged +  and beaked +
Fruit condition or texture
dry +
Fruit density
dispersed +
Glomerule arrangement
singly +
Habitat
Disturbed sites, moist soils +
Head architecture or arrangement
radiate +
Head architecture or shape
disciform +  and discoid +
Head arrangement
in corymbiform , glomerate , paniculiform , racemiform or spiciform , arrays +  and singly +
Head development
indeterminate +
Head reproduction
homogamous +  and heterogamous +
Illustration copyright
Flora of North America Association +
Illustrator
Yevonn Wilson-Ramsey +
Individual head architecture
each +  and sessile +
Inner phyllary texture
scarious +  and membranous +
Involucre atypical some measurement
0.4 cm4 mm <br />0.004 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
Involucre diameter
0.2 cm2 mm <br />0.002 m <br /> (1 cm10 mm <br />0.01 m <br />) +
Involucre position relational
surrounding +
Involucre shape
hemispheric +
Involucre some measurement
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
Lamina prominence
conspicuous +
Leaf architecture
sessile +  and petiolate +
Leaf arrangement
opposite +
Leaf position
cauline +
Line quantity
2 +
Lobe atypical quantity
3 (5) +
Lobe orientation
reflexed +
Lobe quantity
5 (?) +
Lobe shape
deltate +
Margin architecture or shape
dentate to pinnatifid or palmatifid +  and entire +
Margin shape
toothed +
Number of lower taxa
0 +
Outer phyllary fusion
distinct +
Outer phyllary growth form or texture
herbaceous +
Outer phyllary quantity
3 +  and 5 +
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 arrangement or course or shape
linear +
Palea quantity
wanting +
Palea shape
spatulate;linear or setiform +
Palea some measurement
0.2 cm2 mm <br />0.002 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
Palea texture
membranous +
Pappus duration
persistent +
Pappus life cycle
falling +
Pappus presence
absent +
Peduncle some measurement
0 cm0 mm <br />0 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
Pericarp fragility
tough +
Pericarp width
thick +
Peripheral floret presence
absent +
Peripheral floret quantity
1 (10) +
Petal fusion
connate +
Petiole atypical some measurement
2 cm20 mm <br />0.02 m <br /> (3 cm30 mm <br />0.03 m <br />) +
Petiole some measurement
0.5 cm5 mm <br />0.005 m <br /> (2 cm20 mm <br />0.02 m <br />) +
Phenology
Flowering Jul–Nov. +
Phyllary atypical quantity
3 (5) +
Phyllary duration
persistent +
Phyllary fusion
connate +  and distinct +
Phyllary growth form or texture
herbaceous +
Phyllary life cycle
falling +
Phyllary quantity
3 +  and 15 +
Phyllary shape
Lanceovate (Linear) +
Phyllary size
unequal +  and subequal +
Phyllary texture
Herbaceous (Chartaceous) +
Publication title
Sp. Pl. +
Publication year
1753 +
Ray-floret architecture
pistillate +
Ray-floret atypical quantity
5 (8) +
Ray-floret presence
absent +
Ray-floret quantity
5 (?) +
Ray-floret reproduction
fertile +
Receptacle architecture
paleate +
Receptacle pubescence
bearing subulate enations +, hairy +  and bristly +
Receptacle shape
convex;hemispheric +
Reference
None +
Root texture
fibrous +
Seed architecture
exalbuminous +
Seed quantity
1 +
Sepal variability
modifed +
Series atypical quantity
8 (12) +
Series quantity
1;3 +
Source xml
https://bibilujan@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/84153f6d59a0a91d69695978a64cee7560374f8e/V19-20-21/V21 46.xml +
Stamen arrangement
alternate +
Stamen atypical quantity
4 (5) +
Stamen quantity
5 +
Stem architecture
branched +
Stem growth form or orientation
decumbent +  and sprawling +
Stem orientation
erect +
Stigmatic papilla presence
absent +
Style-branch architecture
appendaged +  and truncate +
Style architecture
2-branched +
Style pubescence
hirsutulous +  and glabrous +
Style quantity
1 +
Style relief
papillate +
Synonyms
Iva annua var. caudata +  and Iva annua var. macrocarpa +
Taxon family
Asteraceae +
Taxon name
Iva annua +
Taxon parent
Iva +
Taxon rank
species +
Throat shape
campanulate +  and cylindric +
Tube length or size
longer +
Ultimate margin shape
toothed +  and entire +
Volume
Volume 21 +
Whole-organism atypical some measurement
100 cm1,000 mm <br />1 m <br /> (150 cm1,500 mm <br />1.5 m <br />) +
Whole-organism duration
annual +
Whole-organism some measurement
50 cm500 mm <br />0.5 m <br /> (100 cm1,000 mm <br />1 m <br />) +
Whole organism atypical some measurement
150 cm1,500 mm <br />1.5 m <br /> (400 cm4,000 mm <br />4 m <br />) +
Whole organism growth form
shrub +  and subshrub +
Whole organism some measurement
10cm (350cm) +
X chromosome quantity
18 +