Ambrosia dumosa

(A. Gray) W. W. Payne

J. Arnold Arbor. 45: 422. 1964

Common names: Bursage
Basionyms: 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 cup-shaped, 3–5 mm diam., ± strigillose; florets 8–15+. Burs: bodies ± globose, 3–5+ mm, pilosulous and/or gland-dotted, 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, Sonora).

Discussion

References

None.

Lower Taxa

No lower taxa listed.

Facts about "Ambrosia dumosa"
AuthorJohn L. Strother +
Authority(A. Gray) W. W. Payne +
BasionymsFranseria dumosa +
Common nameBursage +
DistributionAriz. +, Calif. +, Nev. +, Utah +, Mexico (Baja California + and Sonora). +
Elevation(-100–)100–1200(–1500) m +
HabitatRocky or sandy washes, benches +
IllustratorBarbara Alongi +
PhenologyFlowering Mar–May(–Dec). +
Publication titleJ. Arnold Arbor. +
Publication year1964 +
ReferenceNone +
Source xmlhttps://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f6b125a955440c0872999024f038d74684f65921/coarse grained fna xml/V19-20-21/V21 8.xml +
SynonymsFranseria + and Hymenoclea +
Taxon familyAsteraceae +
Taxon nameAmbrosia dumosa +
Taxon parentAmbrosia +
Taxon rankspecies +
VolumeVolume 21 +