Marsdenia roylei

Names and Synonyms

Scientific Names

Accepted name

Synonyms

• Pergularia roylei

Sources: Wikidata, Catalogue of Life

Taxonomical Classification

This plant belongs to the kingdom Plantae and is classified under the phylum Streptophyta and class Equisetopsida. Within the subclass Magnoliidae, it is ordered as Gentianaales and is a member of the family Apocynaceae. Finally, it is categorized under the genus Marsdenia.

Sources: The World Checklist of Vascular Plants (WCVP)

Distribution

This plant is widely distributed across various regions within the Indian Subcontinent. It can be found growing in the diverse landscapes of India and its neighboring territories. Specifically, its presence is noted in the lush environments of Assam and throughout Bangladesh. The species also inhabits the rugged terrains of the East Himalaya. Finally, its geographical range extends into the mountainous regions of Nepal.

Sources: The World Checklist of Vascular Plants (WCVP)

Botanical Identification

Ecology

The ecology of Marsdenia roylei is characterized by its distribution across specific altitudinal gradients within its native montane habitats. This species is typically found inhabiting environments that span an elevational range from a minimum of 500 m AMSL to a maximum of 2000 m AMSL. This vertical distribution suggests an adaptation to varying temperate or subtropical climatic conditions, ranging from lower montane forests to higher-altitude scrublands or woodland margins. Such an elevational niche dictates the specific temperature regimes, moisture availability, and sunlight exposure the plant encounters, playing a crucial role in its growth patterns and ecological interactions within its specialized mountain ecosystems.

Elevational range max:

2000 m AMSL

Elevational range min:

500 m AMSL

Morphology

The morphology of Marsdenia roylei is characterized by its growth as an obligatory climber, functioning primarily as a liana or vine to navigate its environment. Its growth form is classified under the category of other, distinguishing it from typical herbs, shrubs, or trees. As a terrestrial plant, it grows in the soil rather than living as an epiphyte. Furthermore, the structural composition of the plant is notably non-woody, lacking the rigid lignified tissues found in many other climbing species.

Climber :

vine

Climber :

obligatory

Epiphyte :

terrestrial

Growth form :

other

Woodiness :

non-woody

Physiology

The physiology of Marsdenia roylei is characterized by its metabolic processes and nutrient acquisition strategies typical of woody climbing shrubs within the Apocynaceae family. Its physiological framework involves specialized photosynthetic pathways to sustain its climbing growth habit, utilizing carbon fixation to produce carbohydrates necessary for structural development and secondary metabolite synthesis. In terms of nutrient cycling, the plant does not exhibit the physiological capacity for symbiotic nitrogen fixation; specifically, it is not a nitrogen fixer, meaning it lacks the specialized root nodules or symbiotic relationships with diazotrophic bacteria required to convert atmospheric nitrogen into bioavailable forms. Consequently, its physiological reliance on nitrogen is strictly dependent on the uptake of nitrates and ammonium from the soil through its root system to support protein synthesis and enzymatic functions.

Nitrogen fixer :

no

Reproduction

The reproduction of Marsdenia roylei is characterized by a distinct seasonal flowering cycle that dictates its reproductive availability. The flowering process typically commences in June, marking the onset of its reproductive phase. This period of blooming continues through the warmer and transitional months, ultimately reaching its conclusion in October. Therefore, the plant's reproductive window is concentrated within this mid-year to late-year timeframe, ensuring that its floral development is synchronized with specific environmental cues.

Flowering time :

Jun

Flowering time :

Oct

Sources: Global Inventory of Floras and Traits (GIFT)

Chemicals

Marsdenia roylei has 2 reported phytochemicals identified across 0 scientific publications and several other databases. The most consistently reported chemicals include Deniose, Royleose.

Deniose

1. Phytochemistry

Royleose

1. Phytochemistry