Decalobanthus peltatus

Names and Synonyms

Scientific Names

Accepted name

Synonyms

• Ipomoea peltata
• Merremia peltata
• Convolvulus peltatus
• Ipomoea menispermacea
• Convolvulus nymphaeifolius
• Chironia capsularis
• Operculina peltata
• Merremia nymphaeifolia
• Spiranthera peltata
• Chironia lanosanthera

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 Solanales. Finally, it resides in the family Convolvulaceae and is identified by the genus Decalobanthus.

Sources: The World Checklist of Vascular Plants (WCVP)

Distribution

This plant exhibits a broad distribution across several distinct regions of the Indian Ocean basin. In East Tropical Africa, its presence is specifically noted within the borders of Tanzania. Moving toward the Western Indian Ocean, the species can be found inhabiting the islands of Comoros and Mauritius. It also maintains a significant presence throughout the diverse landscapes of Madagascar. Finally, its geographical range extends to the island of Réunion within the same oceanic region.

Sources: The World Checklist of Vascular Plants (WCVP)

Botanical Identification

Ecology

The ecology of Decalobanthus peltatus is characterized by its specialized adaptation to saline environments, specifically within halophytic vegetation zones. It frequently establishes itself amidst dense secondary shrublands, where it thrives in complex, multi-layered vegetative structures. Additionally, the species demonstrates significant resilience in rude-ral vegetation, indicating an ability to colonize disturbed habitats and anthropogenically influenced landscapes. This combination of habitats suggests a plant capable of navigating both high-salinity coastal or salt-pan ecosystems and more opportunistic, successional environments.

Habitat :

halophytic vegetation, dense secondary shrub and ruderal vegetation

Life history

The life history of Decalobanthus peltatus is characterized by its classification as a phanerophyte, a growth form where the perennating buds are located high above the ground on aerial shoots. Within this life history strategy, the plant exhibits specific variations in its structural development, functioning both as a phanerophyte and a nanophanerophyte, which dictates how it survives seasonal environmental changes by protecting its reproductive and vegetative buds on elevated stems. This life cycle allows the plant to persist through unfavorable periods by maintaining its primary biomass above the soil surface, ensuring a continuous presence within its ecological niche.

Life form :

phanerophyte

Morphology

The morphology of Decalobanthus peltatus is characterized by a growth form classified as "other," specifically exhibiting a liana climbing habit. It functions as an obligatory climber, relying on external support to ascend, and reaches a maximum plant height of 30 m, with a mean height also recorded at 30 m. As a terrestrial species, it is neither aquatic nor epiphytic, maintaining an independent life cycle without parasitic dependencies. The woodiness of the plant is described as variable, contributing to its structural role as a woody or non-woody climber within its ecosystem.

Aquatic :

terrestrial

Climber :

liana

Climber :

obligatory

Epiphyte :

terrestrial

Growth form :

other

Parasite :

independent

Plant height mean:

30 m

Woodiness :

variable

Physiology

The physiology of Decalobanthus peltatus is characterized by a C3 photosynthetic pathway, which dictates its carbon fixation process and metabolic efficiency under typical environmental conditions. Unlike succulent species, this plant does not exhibit succulence, meaning it lacks specialized parenchyma tissue for significant water storage within its vegetative structures. Furthermore, it does not function as a nitrogen fixer, relying instead on the availability of nitrogen within the soil substrate rather than through symbiotic relationships with nitrogen-fixing bacteria.

Nitrogen fixer :

no

Photosynthetic pathway :

C3

Succulence :

no

Reproduction

The reproduction of Decalobanthus peltatus is characterized by a complex dispersal strategy that utilizes multiple environmental vectors to ensure the spread of its progeny. The primary dispersal syndrome identified for this species is hydrochorous, indicating that water serves as a critical medium for the movement of its reproductive units. However, the plant exhibits a multifaceted approach to colonization, encompassing a diverse range of dispersal syndromes including anemochorous, zoochorous, autochorous, and unspecialized methods. This reproductive versatility is further detailed by a secondary dispersal profile that integrates hydrochorous movement with specialized biological interactions such as endozoochorous, epizoochorous, myrmecochorous, and anthropochorous dispersal. By leveraging these various mechanisms—ranging from wind and water to animal ingestion, external attachment, and even human-mediated transport—Decalobanthus peltatus maximizes its potential for spatial distribution across varied habitats.

Dispersal syndrome :

hydrochorous

Sources: Global Inventory of Floras and Traits (GIFT)

Chemicals

Decalobanthus peltatus has 4 reported phytochemicals identified across 0 scientific publications and several other databases. The most consistently reported chemicals include Flavonoids, Saponins, Steroids, Tannins.

Flavonoids

1. Environmental analysis, health and toxicology

Saponins

1. Environmental analysis, health and toxicology

Steroids

1. Environmental analysis, health and toxicology

Tannins

1. Environmental analysis, health and toxicology