Ambrosia acanthicarpa

Hooker

Fl. Bor.-Amer. 1: 309. 1833.

Endemic
Synonyms: Franseria acanthicarpa (Hooker) Coville
Treatment appears in FNA Volume 21. Treatment on page 15. Mentioned on page 11.

Annuals, 10–80+ cm. Stems erect. Leaves opposite (proximal) and alternate; petioles 5–15 (–25+) mm; blades ± deltate, 15–40 (–85+) × 12–35 (–80+) mm, 1–2-pinnately lobed, bases cuneate, ultimate margins entire or toothed, abaxial faces hispid and strigillose to sericeous, adaxial faces strigillose and glanddotted. Pistillate heads clustered, proximal to staminates; florets 1. Staminate heads: peduncles 0.5–2 mm; involucres shallowly cupshaped (usually each with 1–5+ black nerves), 3–5 (–7) mm diam., sparsely hirsute or glabrous; florets 6–12 (–20+). Burs: bodies fusiform to obpyramidal, 3–5 mm, ± hirsutulous or glabrate, spines 8–18+, scattered, stoutly subulate (sometimes basally flattened or navicular), 2–4 (–5) mm, tips straight or uncinate. 2n = 36.


Phenology: Flowering (Apr–)Jul–Nov.
Habitat: Canyons, sandy flats, dunes
Elevation: 10–3000 m

Distribution

V21-15-distribution-map.gif

Alta., Man., Sask., Ariz., Calif., Colo., Idaho, Kans., Minn., Mo., Mont., Nebr., Nev., N.Mex., N.Dak., Okla., Oreg., S.Dak., Tex., Utah, Wash., Wyo.

Discussion

Selected References

None.

Lower Taxa

None.

... more about "Ambrosia acanthicarpa"
strigillose +  and sericeous +
not tailed +, rounded +  and obtuse +
coherent +  and distinct +
connate +  and distinct +
subequal +
scarious +
usually ovate +  and lanceolate +
usually deltate +  and lanceolate +
spiciform +, racemiform +, paniculiform +, glomerate +  and corymbiform +
indeterminate +  and determinate +
John L. Strother +
Hooker +
cuneate +
compound +  and simple +
4 cm40 mm <br />0.04 m <br /> (8.5 cm85 mm <br />0.085 m <br />) +
3.5 cm35 mm <br />0.035 m <br /> (8 cm80 mm <br />0.08 m <br />) +
1.5 cm15 mm <br />0.015 m <br /> (4 cm40 mm <br />0.04 m <br />) +
lobed;deltate +
12mm;35mm +
winged;ribbed;winged;ribbed +
glabrate +  and hirsutulous +
tuberculate +  and rugose +
fusiform;obpyramidal +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
barbellulate +  and barbellate +
purplish +  and whitish +
villous +, strigillose +, hispidulous +, glabrous +  and warty +
tuberculate +
globose +  and obovoid pyramidal pyriform obconic or fusiform +
fertile +  and bisexual +
Alta. +, Man. +, Sask. +, Ariz. +, Calif. +, Colo. +, Idaho +, Kans. +, Minn. +, Mo. +, Mont. +, Nebr. +, Nev. +, N.Mex. +, N.Dak. +, Okla. +, Oreg. +, S.Dak. +, Tex. +, Utah +, Wash. +  and Wyo. +
10–3000 m +
stipitate-glandular +, glabrate +  and hairy +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Canyons, sandy flats, dunes +
staminate +  and pistillate +
in corymbiform , glomerate , paniculiform , racemiform or spiciform , arrays +  and singly +
indeterminate +
homogamous +  and heterogamous +
each +  and sessile +
membranous +  and scarious +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
glabrous +  and hirsute +
cup-shaped +
conspicuous +
petiolate +  and sessile +
alternate +  and opposite +
incurved;erect +
deltate +
dentate to pinnatifid or palmatifid +  and entire +
connate +  and distinct +
2-carpellate +
stipitate-glandular +, hirtellous +  and villous +
spatulate;linear +
membranous +
persistent +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
1.5 cm15 mm <br />0.015 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
Flowering (Apr–)Jul–Nov. +
5 +  and 16 +
unequal +  and subequal +
Fl. Bor.-Amer. +
bearing subulate enations +, hairy +  and bristly +
convex;flat +
exalbuminous +
0.4 cm4 mm <br />0.004 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
8 (?) +  and 18 (?) +
subulate +
0.2 cm2 mm <br />0.002 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
prostrate +  and decumbent +
appendaged +  and truncate +
hirsutulous +  and glabrous +
papillate +
Franseria acanthicarpa +
Ambrosia acanthicarpa +
Ambrosia +
species +
campanulate +  and cylindric +
straight +
uncinate +
toothed +  and entire +
10 cm100 mm <br />0.1 m <br /> (80 cm800 mm <br />0.8 m <br />) +