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2n chromosome quantity
48 +  and 24 +
Abaxial and adaxial face relief
scabrellous +
Anther base shape
not tailed +, rounded +  and obtuse +
Anther dehiscence
introrse +
Anther fusion
coherent +  and distinct +
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 +, racemiform +, paniculiform +, glomerate +  and corymbiform +
Array development
indeterminate +  and determinate +
Author
John L. Strother +
Authority
Linnaeus +
Band architecture
continuous +
Band quantity
1 +
Base shape
truncate +  and cuneate +
Blade architecture
compound +  and simple +
Blade atypical length
15 cm150 mm <br />0.15 m <br /> (25 cm250 mm <br />0.25 m <br />) +
Blade atypical width
7 cm70 mm <br />0.07 m <br /> (20 cm200 mm <br />0.2 m <br />) +
Blade length
4 cm40 mm <br />0.04 m <br /> (15 cm150 mm <br />0.15 m <br />) +
Blade shape
3(-5)-lobed;rounded-deltate;ovate or elliptic +
Blade width
3 cm30 mm <br />0.03 m <br /> (7 cm70 mm <br />0.07 m <br />) +
Body architecture
winged;ribbed;winged;ribbed +
Body architecture or pubescence or relief
smooth +
Body atypical some measurement
0.5 cm5 mm <br />0.005 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
Body relief
tuberculate +  and rugose +
Body shape
pyramidal +
Body some measurement
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
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
Giant ragweed +  and grande herbe à poux +
Corolla architecture
zygomorphic +
Corolla coloration
purplish +  and whitish +
Corolla presence
absent +
Corolla shape
tubular +  and more or less filiform +
Cypsela architecture
winged +
Cypsela architecture or pubescence or relief
smooth +
Cypsela architecture or shape
spiny +
Cypsela growth form
dimorphic +
Cypsela position
enclosed +
Cypsela pubescence
villous +, strigillose +, hispidulous +, glabrous +  and warty +
Cypsela relief
tuberculate +
Cypsela shape
globose +  and obovoid pyramidal pyriform obconic or fusiform +
Cypsela texture
hard +
Disc floret architecture
staminate +
Disc floret quantity
5 (60) +
Disc floret reproduction
fertile +  and bisexual +
Distribution
Alta. +, B.C. +, Man. +, N.B. +, N.S. +, Ont. +, P.E.I. +, Que. +, Sask. +, Ala. +, Alaska +, Ariz. +, Ark. +, Calif. +, Colo. +, Conn. +, Del. +, D.C. +, Fla. +, Ga. +, Idaho +, Ill. +, Ind. +, Iowa +, Kans. +, Ky. +, La. +, Maine +, Md. +, Mass. +, Mich. +, Minn. +, Miss. +, Mo. +, Mont. +, Nebr. +, N.H. +, N.J. +, N.Mex. +, N.Y. +, N.C. +, N.Dak. +, Ohio +, Okla. +, Oreg. +, Pa. +, R.I. +, S.C. +, S.Dak. +, Tenn. +, Tex. +, Utah +, Vt. +, Va. +, Wash. +, W.Va. +, Wis. +, Wyo. +  and Mexico (Chihuahua) +
Elevation
0–1600 m +
Embryo course
straight +
Face pubescence
stipitate-glandular +, glabrate +  and hairy +
Filament fusion
distinct +
Floret architecture
pistillate +, staminate +  and neuter +
Floret atypical quantity
1;5 +
Floret position
proximal +
Floret quantity
3;25 +
Floret reproduction
bisexual +
Fruit architecture
winged +  and beaked +
Fruit condition or texture
dry +
Fruit density
dispersed +
Glomerule arrangement
singly +
Habitat
Disturbed sites, waste places, damp soils +
Head architecture
staminate +  and pistillate +
Head architecture or arrangement
radiate +
Head architecture or shape
discoid +
Head arrangement
in corymbiform , glomerate , paniculiform , racemiform or spiciform , arrays +  and singly +
Head arrangement or growth form
clustered +
Head development
indeterminate +
Head position
proximal +
Head reproduction
homogamous +  and heterogamous +
Illustration
Present +
Illustration copyright
Flora of North America Association +
Illustrator
Barbara Alongi +
Individual head architecture
each +  and sessile +
Inner phyllary texture
membranous +  and scarious +
Involucre diameter
0.2 cm2 mm <br />0.002 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
Involucre position relational
surrounding +
Involucre relief
scabrellous +
Involucre shape
saucer--shaped +
Lamina prominence
conspicuous +
Leaf architecture
petiolate +  and sessile +
Leaf arrangement
opposite +
Leaf position
cauline +
Line quantity
2 +
Lobe atypical quantity
3 (5) +
Lobe orientation
incurved;erect +
Lobe quantity
5 (?) +
Lobe shape
deltate +
Margin architecture or shape
entire +
Margin shape
toothed +
Number of lower taxa
0 +
Outer phyllary atypical quantity
1 (5) +
Outer phyllary fusion
connate +  and distinct +
Outer phyllary growth form or texture
herbaceous +
Outer phyllary quantity
5 +  and 8 +
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 pubescence
stipitate-glandular +, hirtellous +  and villous +
Palea quantity
0 +
Palea shape
spatulate;linear +
Palea texture
membranous +
Pappus duration
persistent +
Pappus life cycle
falling +
Pappus presence
absent +
Peduncle some measurement
0.1 cm1 mm <br />0.001 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
Pericarp fragility
tough +
Pericarp width
thick +
Peripheral floret presence
absent +
Peripheral floret quantity
1 (10) +
Petal fusion
connate +
Petiole atypical some measurement
3 cm30 mm <br />0.03 m <br /> (7 cm70 mm <br />0.07 m <br />) +
Petiole some measurement
1 cm10 mm <br />0.01 m <br /> (3 cm30 mm <br />0.03 m <br />) +
Phenology
Flowering Jul–Nov. +
Phyllary atypical quantity
30 (80) +
Phyllary duration
persistent +
Phyllary fusion
connate +
Phyllary life cycle
falling +
Phyllary quantity
5 +  and 16 +
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;flat +
Reference
None +
Root texture
fibrous +
Seed architecture
exalbuminous +
Seed quantity
1 +
Sepal variability
modifed +
Series atypical quantity
8 (12) +
Series quantity
1;1;8 +
Source xml
https://bibilujan@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/84153f6d59a0a91d69695978a64cee7560374f8e/V19-20-21/V21 13.xml +
Special status
Illustrated +
Spine position or shape
distal +
Spine quantity
4 (?) +  and 5 (?) +
Spine shape
acerose +
Spine some measurement
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
Stamen arrangement
alternate +
Stamen atypical quantity
4 (5) +
Stamen quantity
5 +
Staminal filament fusion
connate +
Stem architecture
branched +
Stem growth form or orientation
prostrate +  and decumbent +
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
Ambrosia aptera +, Ambrosia trifida var. integrifolia +  and Ambrosia trifida var. texana +
Taxon family
Asteraceae +
Taxon name
Ambrosia trifida +
Taxon parent
Ambrosia +
Taxon rank
species +
Throat shape
campanulate +  and cylindric +
Tip course
straight +
Tip fusion
free +
Tube length or size
longer +
Ultimate margin shape
toothed +  and entire +
Volume
Volume 21 +
Whole-organism atypical some measurement
150 cm1,500 mm <br />1.5 m <br /> (400 cm4,000 mm <br />4 m <br />) +
Whole-organism duration
annual +
Whole-organism some measurement
30 cm300 mm <br />0.3 m <br /> (150 cm1,500 mm <br />1.5 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 +
Whole organism some measurement
3cm (150cm) +
X chromosome quantity
18 +