bur ragweed

Names and Synonyms

Common Names

• bur ragweed
• Weakleaf Burr Ragweed
• slimleaf bursage

Scientific Names

Accepted name

Synonyms

• Franseria caudata
• Franseria hispidissima
• Franseria incana
• Ambrosia caudata
• Franseria pringlei
• Franseria confertiflora
• Franseria tenuifolia var. tripinnatifida
• Franseria strigulosa

Regional and Traditional Names

Sources: Wikidata, Catalogue of Life

Taxonomical Classification

This plant belongs to the kingdom Plantae within the phylum Streptophyta and the class Equisetopsida. It is further classified under the subclass Magnoliidae and the order Asterales. Finally, it is a member of the family Asteraceae and is identified by the genus Ambrosia.

Sources: The World Checklist of Vascular Plants (WCVP)

Distribution

This plant exhibits a diverse geographical distribution spanning several different continents. In Northern Africa, its presence can be specifically noted in Tunisia. Moving into Western Asia, it is also found within the region of Palestine. The species has successfully established itself in Australia, occurring across the states of New South Wales and Queensland. Furthermore, its range extends southward to include the region of South Australia.

Sources: The World Checklist of Vascular Plants (WCVP)

Botanical Identification

Life history

The life history of Ambrosia confertiflora is characterized by its classification as a perennial species, though its individual life cycle can exhibit variable patterns depending on environmental conditions and resource availability. As a perennial, the plant is capable of surviving for multiple growing seasons, often establishing a robust presence through underground structures that allow it to persist after the dormant winter period. While it maintains a perennial nature, the duration of its active vegetative and reproductive phases may fluctuate, occasionally displaying biennial-like tendencies or varying in longevity based on the stability of its habitat. Throughout its life cycle, the plant progresses from germination to the development of a mature structure capable of producing flowers, eventually entering a period of senescence or dormancy to await favorable conditions for the next cycle of growth.

Lifecycle :

perennial

Morphology

The morphology of Ambrosia confertiflora is characterized by its growth form as a non-woody herb and specifically a forb. This plant is primarily terrestrial in its habitat, though it can exist in semiaquatic environments, and it functions as an independent organism rather than a parasite or epiphyte. It is a self-supporting species, lacking the climbing or vine-like characteristics of lianas, and maintains a structural habit that does not require external support. In terms of size, the plant reaches a maximum height of approximately 2 m.

Aquatic :

terrestrial

Climber :

self-supporting

Epiphyte :

terrestrial

Growth form :

herb

Growth form :

forb

Parasite :

independent

Plant height max:

2 m

Woodiness :

non-woody

Physiology

The physiology of Ambrosia confertiflora is characterized by robust vegetative growth patterns that support its metabolic requirements and photosynthetic capacity. The plant exhibits significant morphological variation in its foliage, which plays a critical role in its energy acquisition and transpiration processes. Specifically, the leaf dimensions are substantial, with leaf lengths reaching a maximum of 16 cm. The lateral expansion of the foliage is equally significant, as the leaf width fluctuates within a range of 10 cm to a maximum of 15 cm. These expansive surface areas facilitate efficient gas exchange and light interception, contributing to the overall vigor and physiological resilience of the species within its ecological niche.

Leaf length max:

16 cm

Leaf width max:

15 cm

Leaf width min:

10 cm

Reproduction

Reproduction in Ambrosia confertiflora is characterized by the production of highly consistent seed units that facilitate its dispersal and survival. The reproductive output is defined by a very specific seed mass profile, where the mean seed mass is recorded at 0.00296 g. This measurement is remarkably uniform across the population, as both the maximum and minimum recorded seed mass values are identical at 0.00296 g. This lack of variance in seed weight suggests a highly standardized reproductive strategy, ensuring that each seed carries a precise amount of resources for germination.

Seed mass mean:

0.00296 g

Sources: Global Inventory of Floras and Traits (GIFT)

Chemicals

Ambrosia confertiflora has 1 reported phytochemicals identified across 0 scientific publications and several other databases. The most consistently reported chemicals include Reynosin.

Reynosin

1. Planta medica

Conditions

Ambrosia confertiflora has 2 reported investigations on conditions identified across 0 scientific publications and several other databases. The most consistently reported conditions include Mycobacterium tuberculosis, gastrointestinal disorders.

Mycobacterium tuberculosis

1. BMC complementary and alternative medicine

Gastrointestinal disorders

1. Journal of medicinal food

Preparations

Ambrosia confertiflora has 2 reported preparations identified across 0 scientific publications and several other databases. The most consistently reported preparations include Methanolic extracts, methanolic extracts.

Methanolic extracts

1. BMC complementary and alternative medicine

Methanolic extracts

1. Journal of medicinal food