familyAsteraceae
tribeAsteraceae tribe Heliantheae
subtribeAsteraceae (tribe Heliantheae) subtribe Ambrosiinae
genusAmbrosia
speciesAmbrosia chenopodiifolia

Ambrosia chenopodiifolia

(Bentham) W. W. Payne

J. Arnold Arbor. 45: 419. 1964.

John L. Strother
Basionym: Franseria chenopodiifolia Bentham Bot. Voy. Sulphur, 26. 1844
Treatment appears in FNA Volume 21. Treatment on page 14. Mentioned on page 11.

Shrubs, 30–80+ cm. Stems erect. Leaves mostly alternate; petioles 5–20 mm; blades ovate to rounded-deltate, 20–35 (–50) × 18–30 (–45) mm, bases broadly cuneate to ± truncate, margins toothed, abaxial faces ± densely tomentulose (between veins), adaxial faces sparsely tomentulose, glabrescent. Pistillate heads clustered, proximal to staminates; florets 2 (–3). Staminate heads: peduncles 0–3 mm; involucres ± cupshaped, 3–5 mm diam., tomentulose; florets 12–20+. Burs: bodies obconic to fusiform, 4–6 mm, tomentulose (little, if at all, stipitate-glandular), spines 15–20+, scattered or on distal 1/2, ± subulate (the proximal basally flattened), 2–3 mm, tips usually uncinate, sometimes straight. 2n = 72.


Phenology: Flowering Mar–Apr.
Habitat: Clays or sandy soils, among lava rocks
Elevation: 50–200 m

Distribution

V21-11-distribution-map.gif

Calif., Mexico (Baja California), Mexico (Baja California Sur)

Discussion

Selected References

None.

Lower Taxa

None.

"tomentulose" is not a number.

... more about "Ambrosia chenopodiifolia"
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2n chromosome quantity
72 +
Abaxial face pubescence
tomentulose +
Adaxial face pubescence
glabrescent +  and tomentulose +
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
(Bentham) W. W. Payne +
Band architecture
continuous +
Band quantity
1 +
Base shape
broadly cuneate +  and more or less truncate +
Basionyms
Franseria chenopodiifolia +
Blade architecture
compound +  and simple +
Blade atypical length
3.5 cm35 mm <br />0.035 m <br /> (5 cm50 mm <br />0.05 m <br />) +
Blade atypical width
3 cm30 mm <br />0.03 m <br /> (4.5 cm45 mm <br />0.045 m <br />) +
Blade length
2 cm20 mm <br />0.02 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
Blade shape
ovate;rounded-deltate +
Blade width
1.8 cm18 mm <br />0.018 m <br /> (3 cm30 mm <br />0.03 m <br />) +
Body architecture
winged;ribbed;winged;ribbed +
Body architecture or pubescence or relief
smooth +
Body relief
tuberculate +  and rugose +
Body shape
obconic;fusiform +
Body some measurement
0.4 cm4 mm <br />0.004 m <br /> (0.6 cm6 mm <br />0.006 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) +
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
Calif. +, Mexico (Baja California) +  and Mexico (Baja California Sur) +
Elevation
50–200 m +
Embryo course
straight +
Face pubescence
stipitate-glandular +, glabrate +  and hairy +
Filament fusion
distinct +
Floret architecture
pistillate +, staminate +  and neuter +
Floret atypical quantity
2;3 +
Floret position
proximal +
Floret quantity
12;20 +
Floret reproduction
bisexual +
Fruit architecture
winged +  and beaked +
Fruit condition or texture
dry +
Fruit density
dispersed +
Glomerule arrangement
singly +
Habitat
Clays or sandy soils, among lava rocks +
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 copyright
Flora of North America Association +
Illustrator
Barbara Alongi +
Individual head architecture
each +  and sessile +
Inner phyllary texture
membranous +  and scarious +
Involucre diameter
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
Involucre position relational
surrounding +
Involucre pubescence
tomentulose +
Involucre shape
cup-shaped +
Lamina prominence
conspicuous +
Leaf architecture
petiolate +  and sessile +
Leaf arrangement
alternate +
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
dentate to pinnatifid or palmatifid +  and 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 cm0 mm <br />0 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 some measurement
0.5 cm5 mm <br />0.005 m <br /> (2 cm20 mm <br />0.02 m <br />) +
Phenology
Flowering Mar–Apr. +
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
J. Arnold Arbor. +
Publication year
1964 +
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 11.xml +
Spine arrangement
on distal 1/2 +  and scattered +
Spine quantity
15 (?) +  and 20 (?) +
Spine shape
subulate +
Spine some measurement
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 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
Franseria +  and Hymenoclea +
Taxon family
Asteraceae +
Taxon name
Ambrosia chenopodiifolia +
Taxon parent
Ambrosia +
Taxon rank
species +
Throat shape
campanulate +  and cylindric +
Tip course
straight +
Tip fusion
free +
Tip shape
uncinate +
Tube length or size
longer +
Ultimate margin shape
toothed +  and entire +
Volume
Volume 21 +
Whole-organism duration
perennial +  and annual +
Whole-organism some measurement
10 cm100 mm <br />0.1 m <br /> (400 cm4,000 mm <br />4 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
30cm (80cm) +
X chromosome quantity
18 +