Micrandra spruceana

Names and Synonyms

Scientific Names

Accepted name

Synonyms

• Cunuria spruceana var. bracteosa
• Pogonophora cunuri
• Cunuria bracteosa
• Micrandra glabra
• Cunuria spruceana
• Micrandra australis
• Cunuria australis
• Cunuria glabra

Regional and Traditional Names

Sources: Wikidata, Catalogue of Life

Taxonomical Classification

This plant, Micrandra spruceana, belongs to the kingdom Plantae and the phylum Streptophyta. Within the class Equisetopsida and subclass Magnoliidae, it is categorized under the order Malpighiales. Finally, it is classified within the family Euphorbiaceae and the genus Micrandra.

Sources: The World Checklist of Vascular Plants (WCVP)

Distribution

This plant is widely distributed across various regions of South America. In the northern part of the continent, it can be found in Guyana, Suriname, and Venezuela. Moving toward the western side of the continent, its range extends into Colombia. Additionally, the species is documented to grow within the borders of Peru. Together, these locations highlight a broad presence across both northern and western South American territories.

Sources: The World Checklist of Vascular Plants (WCVP)

Botanical Identification

Ecology

The ecology of Micrandra spruceana is characterized by its presence in specific forest ecosystems, where it thrives in both riparian environments, such as riverine forests (Floresta Ciliar) or gallery forests (Floresta de Galeria), as well as in well-drained upland forests (Floresta de Terra Firme). This species occupies a specific altitudinal niche, ranging from a minimum elevation of 100 m AMSL to a maximum elevation of 650 m AMSL.

Elevational range max:

650 m AMSL

Elevational range min:

100 m AMSL

Habitat :

Floresta Ciliar ou Galeria, Floresta de Terra Firme

Life history

The life history of Micrandra spruceana is characterized by a perennial lifecycle, allowing the plant to persist in its environment over many years. As a phanerophyte, its regenerative buds are located high above the ground on woody stems, a life form classification that is consistent across its developmental stages. Furthermore, the species maintains an evergreen deciduousness, ensuring that its foliage remains functional throughout its long-term existence.

Deciduousness :

evergreen

Life form :

phanerophyte

Lifecycle :

perennial

Morphology

The morphology of Micrandra spruceana is characterized by its substantial stature and robust structural composition. It is a woody tree that functions as a self-supporting organism, reaching a mean height of approximately 25 m, with a maximum potential height of up to 30 m. As a terrestrial species, it does not exhibit aquatic or semiaquatic tendencies, nor does it function as an epiphyte, remaining strictly grounded. The plant is an independent organism, meaning it does not exhibit parasitic behavior, and its growth form is strictly that of a large, self-supporting tree rather than a climber, vine, or liana.

Aquatic :

terrestrial

Climber :

self-supporting

Epiphyte :

terrestrial

Growth form :

tree

Parasite :

independent

Plant height max:

30 m

Plant height mean:

25 m

Woodiness :

woody

Physiology

The physiology of Micrandra spruceana is characterized by a C3 photosynthetic pathway, meaning it utilizes the Calvin cycle to fix carbon dioxide through the enzyme RuBisCO, a process typical of many tropical woody species. Regarding its nutrient acquisition processes, the plant is not a nitrogen fixer, as it lacks the symbiotic relationship with nitrogen-fixing bacteria required to convert atmospheric nitrogen into usable forms, relying instead on the uptake of available nitrogen from the soil through its root system.

Nitrogen fixer :

no

Photosynthetic pathway :

C3

Reproduction

Reproduction in Micrandra spruceana is characterized by specific morphological dimensions within its propagules, particularly concerning the development of its seeds. The reproductive output is defined by a highly consistent seed size, which exhibits no variance across observed samples. The seed volume is precisely measured at a constant 7600 mm³, representing the minimum, maximum, and mean values recorded for the species. This uniformity in seed volume suggests a highly stabilized reproductive strategy, ensuring that each seed possesses a consistent level of nutrient reserves and physical dimensions necessary for successful germination and early seedling establishment.

Seed volume max:

7600 mm³

Sources: Global Inventory of Floras and Traits (GIFT)

Chemicals

Micrandra spruceana has 2 reported phytochemicals identified across 0 scientific publications and several other databases. The most consistently reported chemicals include Montanin, Spruceanol.

Montanin

1. Journal of natural products

Spruceanol

1. Journal of natural products