viper grass

Names and Synonyms

Common Names

• viper grass
• Cats Tail Vlei Grass

Scientific Names

Accepted name

Synonyms

• Cynosurus retroflexus

Sources: Wikidata, Catalogue of Life

Taxonomical Classification

This plant, known scientifically as Dinebra retroflexa, belongs to the kingdom Plantae and the phylum Streptophyta. Within the class Equisetopsida and subclass Magnoliidae, it is categorized under the order Poales and the family Poaceae. Finally, it is classified under the genus Dinebra.

Sources: The World Checklist of Vascular Plants (WCVP)

Distribution

This plant exhibits a broad geographical distribution spanning across both Europe and Africa. In Middle Europe, its presence is documented within the territories of Germany as well as the Czechia-Slovakia region. Moving toward Northern Africa, the species can be found growing in the landscapes of Egypt and Libya. Furthermore, its range extends westward to include the country of Morocco. Together, these locations highlight the diverse environmental settings where the plant thrives.

Sources: The World Checklist of Vascular Plants (WCVP)

Botanical Identification

Ecology

The ecology of Dinebra retroflexa is characterized by a broad altitudinal distribution that allows it to inhabit a diverse array of environmental gradients. This species demonstrates remarkable adaptability, occupying habitats ranging from sea level up to a maximum elevation of 1400 m AMSL. Throughout its natural range, the plant maintains a mean elevation of approximately 875 m AMSL, suggesting a preference for mid-altitude landscapes while remaining capable of surviving in lowland coastal or riverine settings as low as 4 m AMSL. This wide elevational span implies that the species can tolerate varying climatic conditions, including shifts in temperature, moisture availability, and atmospheric pressure associated with different topographical tiers.

Elevational range max:

1400 m AMSL

Elevational range mean:

875 m AMSL

Elevational range min:

4 m AMSL

Life history

The life history of Dinebra retroflexa is characterized by an annual lifecycle, meaning the plant completes its entire biological process of germination, growth, flowering, and seed production within a single growing season. Functioning as a therophyte, it survives unfavorable environmental periods primarily through its seed stage, which remains dormant until conditions become suitable for rapid development. This life form strategy allows the plant to exploit transient resources efficiently, utilizing its brief period of vegetative growth to reach maturity and ensure reproductive success before the onset of seasonal stress.

Life form :

therophyte

Lifecycle :

annual

Morphology

The morphology of Dinebra retroflexa is characterized by its growth form as a non-woody, graminoid herb. This plant typically exhibits a height ranging from a minimum of 0.12 m to a maximum of 0.89 m. Functionally, it acts as a self-supporting climber, though it maintains a terrestrial habit rather than being strictly aquatic or epiphytic. As an independent organism, it does not function as a parasite, and while its habitat can span aquatic, semiaquatic, and terrestrial environments, its primary growth mode is terrestrial.

Aquatic :

terrestrial

Climber :

self-supporting

Epiphyte :

terrestrial

Growth form :

herb

Growth form :

graminoid

Parasite :

independent

Plant height max:

0.89 m

Plant height min:

0.12 m

Woodiness :

non-woody

Physiology

The physiology of Dinebra retroflexa is characterized by its specialized metabolic efficiency, specifically through its utilization of the C4 photosynthetic pathway. Unlike plants employing the standard C3 pathway, this species utilizes a specialized leaf anatomy and a biochemical mechanism that concentrates carbon dioxide around the enzyme RuBisCO, thereby significantly reducing photorespiration. This C4 metabolic strategy allows the plant to maintain high rates of photosynthetic carbon assimilation even under conditions of high light intensity, elevated temperatures, and limited water availability. By spatially separating initial carbon fixation from the Calvin cycle, Dinebra retroflexa optimizes its water-use efficiency and nitrogen utilization, enabling it to thrive in environments where evaporative demand is high and gas exchange must be tightly regulated.

Photosynthetic pathway :

C4

Reproduction

The reproduction of Dinebra retroflexa is characterized by the production of specialized seeds that exhibit a highly uniform physical profile. Quantitative analysis of its reproductive output reveals a consistent seed mass, with a mean value of 0.0022 g. This consistency is absolute across the sampled population, as both the maximum and minimum recorded seed mass values are identical at 0.0022 g. This lack of variance in seed mass suggests a highly stabilized reproductive strategy, ensuring that each individual seed carries a standardized amount of biological material for potential germination and seedling establishment.

Seed mass mean:

0.0022 g

Sources: Global Inventory of Floras and Traits (GIFT)

Chemicals

Dinebra retroflexa has 5 reported phytochemicals identified across 0 scientific publications and several other databases. The most consistently reported chemicals include Flavonoids, Gallic acid, Phenolic acid, Polyphenolic, quercetin.

Flavonoids

1. Medicina (Kaunas, Lithuania)

Gallic acid

1. Medicina (Kaunas, Lithuania)

Phenolic acid

1. Medicina (Kaunas, Lithuania)

Polyphenolic

1. Medicina (Kaunas, Lithuania)

quercetin

1. Medicina (Kaunas, Lithuania)

Conditions

Dinebra retroflexa has 1 reported investigations on conditions identified across 0 scientific publications and several other databases. The most consistently reported conditions include pulmonary fibrosis.

Pulmonary fibrosis

1. Medicina (Kaunas, Lithuania)

Preparations

Dinebra retroflexa has 2 reported preparations identified across 0 scientific publications and several other databases. The most consistently reported preparations include Dinebra retroflexa methanolic extract, synthesized silver nanoparticles.

Dinebra retroflexa methanolic extract

1. Medicina (Kaunas, Lithuania)

Synthesized silver nanoparticles

1. Medicina (Kaunas, Lithuania)