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

Ambrosia dumosa

(A. Gray) W. W. Payne

J. Arnold Arbor. 45: 422. 1964.

John L. Strother
Common names: Bursage
Basionym: Franseria dumosa A. Gray in J. C. Frémont, Rep. Exped. Rocky Mts., 316. 1845
Treatment appears in FNA Volume 21. Treatment on page 13. Mentioned on page 10, 12.

Shrubs, 10–40 (–60+) cm. Stems erect. Leaves mostly alternate; petioles 2–8 (–12+) mm; blades (white) ovate to elliptic, 10–25 (–45) × 8–15 (–30) mm, (1–) 2–3-pinnately lobed, abaxial and adaxial faces densely strigillose. Pistillate heads intermixed with staminates (sometimes wanting or staminates sometimes wanting, plants unisexual); florets (1–) 2. Staminate heads: peduncles 0–1 (–2) mm; involucres shallowly cupshaped, 3–5 mm diam., ± strigillose; florets 8–15+. Burs: bodies ± globose, 3–5+ mm, pilosulous and/or glanddotted, spines 12–25+, scattered, ± subulate (± navicular at bases), 2–4 mm, tips straight. 2n = 36, 72, 108, 126.


Phenology: Flowering Mar–May(–Dec).
Habitat: Rocky or sandy washes, benches
Elevation: (-100–)100–1200(–1500) m

Distribution

V21-8-distribution-map.gif

Ariz., Calif., Nev., Utah, Mexico (Baja California), Mexico (Sonora)

Discussion

Selected References

None.

Lower Taxa

None.

"pilosulous" is not a number.

... more about "Ambrosia dumosa"
RDF feed
2n chromosome quantity
126 +, 108 +, 72 +  and 36 +
Abaxial and adaxial face pubescence
Strigillose (?) +
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
(A. Gray) W. W. Payne +
Band architecture
continuous +
Band quantity
1 +
Base shape
decurrent +
Basionyms
Franseria dumosa +
Blade architecture
compound +  and simple +
Blade atypical length
2.5 cm25 mm <br />0.025 m <br /> (4.5 cm45 mm <br />0.045 m <br />) +
Blade atypical width
1.5 cm15 mm <br />0.015 m <br /> (3 cm30 mm <br />0.03 m <br />) +
Blade length
1 cm10 mm <br />0.01 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
Blade shape
lobed;ovate;elliptic +
Blade width
0.8 cm8 mm <br />0.008 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
Body architecture
winged;ribbed;winged;ribbed +
Body architecture or pubescence or relief
smooth +
Body relief
tuberculate +  and rugose +
Body shape
globose +
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
Bursage +
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
Ariz. +, Calif. +, Nev. +, Utah +, Mexico (Baja California) +  and Mexico (Sonora) +
Elevation
(-100–)100–1200(–1500) m +
Embryo course
straight +
Face pubescence
stipitate-glandular +, glabrate +  and hairy +
Filament fusion
distinct +
Floret architecture
pistillate +, staminate +  and neuter +
Floret atypical quantity
1;2 +
Floret position
proximal +
Floret quantity
8;15 +
Floret reproduction
bisexual +
Fruit architecture
winged +  and beaked +
Fruit condition or texture
dry +
Fruit density
dispersed +
Glomerule arrangement
singly +
Habitat
Rocky or sandy washes, benches +
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 development
indeterminate +
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
strigillose +
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 +
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 atypical some measurement
0.1 cm1 mm <br />0.001 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
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
0.8 cm8 mm <br />0.008 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
Petiole some measurement
0.2 cm2 mm <br />0.002 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
Phenology
Flowering Mar–May(–Dec). +
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 8.xml +
Spine arrangement
scattered +
Spine quantity
12 (?) +  and 25 (?) +
Spine shape
subulate +
Spine some measurement
0.2 cm2 mm <br />0.002 m <br /> (0.4 cm4 mm <br />0.004 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 dumosa +
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 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
40 cm400 mm <br />0.4 m <br /> (60 cm600 mm <br />0.6 m <br />) +
Whole organism growth form
shrub +
Whole organism some measurement
10cm (40cm) +
X chromosome quantity
18 +