Ambrosia chamissonis Greene

Silver bur ragweed (en)

Species

Angiosperms > Asterales > Asteraceae > Ambrosia

Characteristics

Perennials, 50–150(–350+) cm. Stems prostrate or decumbent. Leaves mostly alternate; petioles 15–30(–45+) mm; blades rounded-deltate to ovate or obovate, 20–45(–70+) × 10–25(–50+) mm overall, not lobed or 1–2(–3)-pinnately lobed, bases cuneate, ultimate margins entire or toothed, abaxial and adaxial faces strigillose to sericeous. Pistillate heads clustered, proximal to staminates; florets 1. Staminate heads: peduncles 0.5–2 mm; involucres shallowly cup-shaped, 4–6+ mm diam., strigillose; florets 8–25(–50). Burs: bodies fusiform to ± pyriform, 4–7+ mm, ± strigillose to pilosulous, spines 8–16+, scattered, stoutly conic or flattened-to triquetrous-subulate, 0.5–1.5+ mm, tips straight. 2n = 36.
Life form perennial
Growth form herb
Growth support free-standing
Foliage retention -
Sexuality -
Pollination -
Spread -
Mature width (meter) -
Mature height (meter) 0.5 - 1.5
Root system -
Rooting depth (meter) -
Root diameter (meter) -
Flower color
Blooming months
JanFebMar
AprMayJun
JulAugSep
OctNovDec
Fruit color -
Fruiting months -
Nitrogen fixer -
Photosynthetic pathway -

Environment

Light -
Soil humidity -
Soil texture -
Soil acidity -
Soil nutriment -
Hardiness (USDA) 7-10

Usage

Uses medicinal
Edible -
Therapeutic use Other (unspecified), Strengthener (unspecified)
Human toxicity -
Animal toxicity -

Cultivation

Mode -
Germination duration (days) -
Germination temperacture (C°) -
Germination luminosity -
Germination treatment -
Minimum temperature (C°) -
Optimum temperature (C°) -
Size -
Vigor -
Productivity -

Images

Leaf

Ambrosia chamissonis leaf picture by Adam Fulford (cc-by-sa)
Ambrosia chamissonis leaf picture by Paz Paz (cc-by-sa)
Ambrosia chamissonis leaf picture by Sherrie Davies (cc-by-sa)

Flower

Ambrosia chamissonis flower picture by Luisa Smith (cc-by-sa)

Distribution

Ambrosia chamissonis world distribution map, present in Canada, Chile, Mexico, and United States of America

Identifiers

LSID urn:lsid:ipni.org:names:11045-2
WFO ID wfo-0000000787
COL ID CPNP
BDTFX ID -
INPN ID -
Wikipedia (EN) Link
Wikipedia (FR)

Synonyms

Ambrosia chamissonis f. chamissonis Franseria cuneifolia Franseria chamissonis Gaertneria chamissonis Ambrosia chamissonis Franseria chamissonis f. bipinnatisecta Ambrosia chamissonis f. bipinnatisecta Franseria chamissonis f. chamissonis Franseria bipinnatifida var. bipinnatifida Gaertneria chamissonis var. chamissonis Gaertneria bipinnatifida var. bipinnatifida Ambrosia chamissonis var. bipinnatisecta Franseria chamissonis var. bipinnatisecta Franseria chamissonis subsp. bipinnatisecta Franseria chamissonis var. chamissonis Ambrosia chamissonis var. cuneifolia Franseria chamissonis subsp. chamissonis Ambrosia chamissonis var. chamissonis