Australian Dodder

Names and Synonyms

Common Names

• Australian Dodder

Scientific Names

Accepted name

Synonyms

• Cuscuta obtusiflora var. australis
• Grammica scandens subsp. australis
• Grammica australis

Sources: Wikidata, Catalogue of Life

Taxonomical Classification

This plant, Cuscuta australis, belongs to the kingdom Plantae and the phylum Streptophyta. Within the class Equisetopsida and subclass Magnoliidae, it is classified under the order Solanales and the family Convolvulaceae. Its taxonomic hierarchy concludes with the genus Cuscuta.

Sources: The World Checklist of Vascular Plants (WCVP)

Distribution

This plant exhibits a specific distribution across various regions of the European continent. In Middle Europe, its presence can be documented in both Hungary and Switzerland. Moving toward the southwestern reaches of the continent, it is found in France and Portugal. Additionally, the species inhabits the island of Corse within the southwestern European territory. Together, these locations define the known geographical range of Cuscuta australis.

Sources: The World Checklist of Vascular Plants (WCVP)

Botanical Identification

Ecology

The ecology of Cuscuta australis is characterized by its preference for open, managed riparian habitats, where it thrives within the moisture-rich environments typical of riverbanks and managed watercourse margins. This species exhibits a broad altitudinal distribution, allowing it to occupy diverse topographical niches. It can be found at elevations as low as 50 m AMSL, with a mean elevation of approximately 1025 m AMSL, reaching its upper limit at an elevation of 2000 m AMSL. This wide elevational range suggests a high degree of adaptability to varying temperature gradients and atmospheric pressures within its preferred riparian ecosystems.

Elevational range max:

2000 m AMSL

Elevational range mean:

1025 m AMSL

Elevational range min:

50 m AMSL

Habitat :

open managed riparian

Life history

The life history of Cuscuta australis is characterized by an annual lifecycle, meaning the plant completes its entire developmental process from germination to seed production within a single growing season. Functionally, its life form is classified as a therophyte, as it survives unfavorable periods through specialized seed stages rather than persistent vegetative structures. This classification is consistent across its morphological descriptions, identifying it as a therophyte due to its reliance on annual seed survival to persist in its environment.

Life form :

therophyte

Lifecycle :

annual

Morphology

The morphology of Cuscuta australis is characterized by its growth form as a non-woody herb, presenting a delicate, vine-like structure that functions as a climber. As an obligatory parasite, it lacks significant independent vegetative structures, instead manifesting as a small-scale organism with a plant height ranging minimally from 0.01 m to a maximum of 0.03 m. Although it can be found in various environments, its habitat classification is primarily terrestrial rather than aquatic or semiaquatic. Furthermore, it does not function as an epiphyte in the traditional sense, maintaining a terrestrial orientation while utilizing host plants for sustenance through its specialized parasitic habit.

Aquatic :

terrestrial

Climber :

vine

Climber :

self-supporting

Epiphyte :

terrestrial

Growth form :

herb

Parasite :

obligatory

Plant height max:

0.03 m

Plant height min:

0.01 m

Woodiness :

non-woody

Physiology

The physiology of Cuscuta australis is defined by its specialized parasitic nature, characterized by the complete absence of functional roots and chlorophyll-bearing leaves, which necessitates a total reliance on a host plant for nutrition and hydration. Instead of traditional vegetative structures, the plant utilizes highly specialized organs known as haustoria, which penetrate the cortical tissues of the host to establish direct physiological connections with the host's xylem and phloem. Through these connections, the parasite facilitates the bidirectional transfer of water, minerals, and organic solutes. While the plant lacks expansive foliage, its vestigial scale-like leaves are extremely minute, with a maximum leaf length of 1 cm and a maximum leaf width of 1 cm, serving more as structural remnants than as primary sites for photosynthesis. The metabolic processes of Cuscuta australis are instead driven by the absorption of carbohydrates from the host's vascular system, allowing the plant to allocate its energy toward rapid stem elongation and the continuous development of its winding, filamentous aerial structures.

Leaf length max:

1 cm

Leaf width max:

1 cm

Reproduction

The reproduction of Cuscuta australis is characterized by a sexual process involving bisexual flowers, which facilitates the production of small fruits. The flowering period is notably flexible and can occur at various times throughout the year, with the flowering cycle typically spanning from December through July, though it remains variable depending on environmental conditions. The resulting fruits are quite minute, with a mean length of 0.35 cm. Specifically, the fruit size ranges from a minimum length of 0.3 cm to a maximum length of 0.4 cm.

Flowering time :

Dec

Flowering time :

Jul

Fruit length max:

0.4 cm

Fruit length mean:

0.35 cm

Fruit length min:

0.3 cm

Reproduction sexual :

bisexual

Sources: Global Inventory of Floras and Traits (GIFT)

Plant Parts

Cuscuta australis has 2 reported plant parts identified across 2 scientific publications and several other databases that are studied for medicinal purposes. The most consistently reported plant part include seed, stem.

Seed

1. Nigerian journal of physiological sciences : official publication of the Physiological Society of Nigeria

Stem

1. Nigerian journal of physiological sciences : official publication of the Physiological Society of Nigeria

Chemicals

Cuscuta australis has 10 reported phytochemicals identified across 2 scientific publications and several other databases. The most consistently reported chemicals include Hyperoside, kaempferol, quercetin, Astragalin, Diosmetin glucoside.

Hyperoside

1. Journal of pharmaceutical and biomedical analysis
2. Zhongguo Zhong yao za zhi = Zhongguo zhongyao zazhi = China journal of Chinese materia medica

kaempferol

1. Journal of pharmaceutical and biomedical analysis
2. Zhongguo Zhong yao za zhi = Zhongguo zhongyao zazhi = China journal of Chinese materia medica

quercetin

1. Journal of pharmaceutical and biomedical analysis
2. Zhongguo Zhong yao za zhi = Zhongguo zhongyao zazhi = China journal of Chinese materia medica

Astragalin

1. Zhongguo Zhong yao za zhi = Zhongguo zhongyao zazhi = China journal of Chinese materia medica

Diosmetin glucoside

1. Pharmaceuticals (Basel, Switzerland)

Feruloylquinic acid

1. Pharmaceuticals (Basel, Switzerland)

caffeic acid glucoside

1. Pharmaceuticals (Basel, Switzerland)

quercetin 3-O-beta-D-apiofuranosyl-(1->2)-beta-D-galactoside

1. Journal of pharmaceutical and biomedical analysis

quercetin glucoside

1. Pharmaceuticals (Basel, Switzerland)

quercetin-3-o-beta-d-galactoside-7-o-beta-d-glucoside

1. Journal of pharmaceutical and biomedical analysis

Activities

Cuscuta australis has 3 reported activities identified across 2 scientific publications and several other databases. The most consistently reported activities include Antihyperlipidemic, Antioxidant, Hepatoprotective.

Antihyperlipidemic

1. Pharmaceuticals (Basel, Switzerland)

Antioxidant

1. Pharmaceuticals (Basel, Switzerland)

Hepatoprotective

1. Pharmaceuticals (Basel, Switzerland)

Medicinal Uses

Cuscuta australis has 2 reported medicinal uses identified across 2 scientific publications and several other databases. The most consistently reported uses include fibrosis, infertility.

Most Reported Uses