WorldFloraDB - Ambrosia acanthicarpa

Characteristics

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 gland-dotted. Pistillate heads clustered, proximal to staminates; florets 1. Staminate heads: peduncles 0.5–2 mm; involucres shallowly cup-shaped (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.

More

Branching annual 1–8 dm, coarsely strigose to scabrous-hispid or both; lvs petioled, opposite below, alternate above, bipinnatifid (or the upper sessile and once pinnatifid), the blade 2–8 cm; heads numerous in terminal-racemiform clusters, sometimes chiefly staminate or chiefly pistillate; fruiting invols solitary or clustered in the upper axils, 5–10 mm, 1-fld and 1-beaked, with several series of flattened, divergent spines, these sometimes reduced in the chiefly staminate plants; 2n=36. Open places, especially in sandy soil; Wash. to Calif., e. to Sask. and Tex., and occasionally intr. eastward, as in Minn. and Mo. July–Oct. (Franseria a.; Gaertneria a.)

Life form

annual

Growth form

herb

Growth support

free-standing

Foliage retention

deciduous

Sexuality

-

Pollination

-

Spread

-

Mature width (meter)

-

Mature height (meter)

0.1 - 0.8

Root system

-

Rooting depth (meter)

1.7

Root diameter (meter)

-

Flower color

Blooming months

Jan	Feb	Mar
Apr	May	Jun
Jul	Aug	Sep
Oct	Nov	Dec

Fruit color

-

Fruiting months

-

Nitrogen fixer

-

Photosynthetic pathway

-

Environment

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

Usage

Uses	animal food medicinal poison
Edible	-
Therapeutic use	Toothache (root), Abortifacient (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

Ambrosia acanthicarpa unspecified picture

Distribution

Identifiers

LSID	urn:lsid:ipni.org:names:176051-1
WFO ID	wfo-0000039838
COL ID	CPN9
BDTFX ID	-
INPN ID	-
Wikipedia (EN)	Link
Wikipedia (FR)

Synonyms

Gaertneria hookeriana Gaertneria acanthicarpa Franseria acanthicarpa Franseria montana Franseria hookeriana Hemixanthidium montanum Ambrosia acanthicarpa

WorldFloraDB 2024

Ambrosia acanthicarpa Hook.

Flatspine bur ragweed (en)

Species

Angiosperms > Asterales > Asteraceae > Ambrosia