Strychnos guianensis

Names and Synonyms

Scientific Names

Accepted name

Distribution

This plant exhibits a specific geographical range that extends through parts of both Central and South America. In Central America, its presence is documented within the borders of Costa Rica. Moving into Northern South America, the species is widely distributed across several distinct territories. It can be found throughout the tropical landscapes of French Guiana, Guyana, and Suriname. Finally, its distribution reaches into the northern reaches of Venezuela, completing its regional footprint.

Sources: The World Checklist of Vascular Plants (WCVP)

Botanical Identification

Ecology

The ecology of Strychnos guianenis is characterized by its preference for low-lying, water-influenced environments within specific tropical ecosystems. It thrives in habitats such as Campo de Várzea, Floresta Ciliar or Galeria, Floresta de Igapó, and Floresta de Várzea, indicating a strong association with seasonally or permanently flooded forest types and riparian zones. This species is restricted to lower altitudinal zones, occupying an elevational range that begins at a minimum of 90 m AMSL and reaches a maximum of 300 m AMSL.

Elevational range max:

300 m AMSL

Elevational range min:

90 m AMSL

Habitat :

Campo de Várzea, Floresta Ciliar ou Galeria, Floresta de Igapó, Floresta de Várzea

Morphology

The morphology of Strychnos guianenis is characterized by a woody, shrub-like growth form that functions as an obligatory liana. This climbing plant is terrestrial in nature, rather than aquatic or epiphytic, and grows as an independent organism without parasitic tendencies. It is capable of reaching a significant plant height, with a mean height of approximately 30 m as it climbs through its habitat.

Aquatic :

terrestrial

Climber :

liana

Climber :

obligatory

Epiphyte :

terrestrial

Growth form :

shrub

Parasite :

independent

Plant height mean:

30 m

Woodiness :

woody

Physiology

The physiology of Strychnos guianenensis is characterized by complex metabolic pathways primarily focused on the biosynthesis of indole alkaloids, which serve as potent secondary metabolites for chemical defense. Its physiological processes involve the assimilation of organic compounds to support the structural development of its woody vines, though it does not engage in symbiotic nitrogen fixation; therefore, it is not a nitrogen fixer (trait_1: no). The plant's nutrient uptake and growth are heavily dependent on the availability of nitrogen within the soil substrate, as it lacks the specialized root nodules required for the biological nitrogen fixation process (trait_2: no). Photosynthetic efficiency and transpiration rates are regulated by its tropical habitat requirements, facilitating the energetic demands necessary for the continuous production of alkaloids throughout its vegetative and reproductive stages.

Nitrogen fixer :

no

Reproduction

The reproduction of Strychnos guiarensis is characterized by specific seed morphology and dispersal mechanisms. The plant produces relatively heavy seeds, with a recorded mean seed mass of 7.275 g. Individual seed weights exhibit a narrow range of variation, with a minimum mass of 7.24 g and a maximum mass of 7.31 g. Regarding its dispersal strategy, the species exhibits a zoochorous dispersal syndrome, meaning it relies on animals to facilitate the movement of its seeds to new locations.

Dispersal syndrome :

zoochorous

Seed mass max:

7.31 g

Seed mass mean:

7.275 g

Seed mass min:

7.24 g

Sources: Global Inventory of Floras and Traits (GIFT)

Plant Parts

Strychnos guianensis has 1 reported plant parts identified across 1 scientific publications and several other databases that are studied for medicinal purposes. The most consistently reported plant part include stem.

Stem

1. Phytochemistry

Preparations

Strychnos guianensis has 1 reported preparations identified across 1 scientific publications and several other databases. The most consistently reported preparations include stem bark.

Stem bark

1. Phytochemistry