giant pinwheel-flower

Names and Synonyms

Common Names

• giant pinwheel-flower

Scientific Names

Accepted name

Synonyms

• Conopharyngia angolensis
• Tabernaemontana pachysiphon var. cumminsii
• Conopharyngia pachysiphon
• Conopharyngia holstii
• Sarcopharyngia angolensis
• Voacanga dichotoma
• Conopharyngia cumminsii
• Tabernaemontana holstii
• Tabernaemontana angolensis

Sources: Wikidata, Catalogue of Life

Taxonomical Classification

This plant belongs to the kingdom Plantae and is classified under the phylum Streptophyta within the class Equisetopsida. It is further categorized under the subclass Magnoliidae and the order Gentianales, falling into the family Apocynaceae. Finally, it is identified by the genus Tabernaemontana and the specific species Tabernaemontana pachysiphon.

Sources: The World Checklist of Vascular Plants (WCVP)

Distribution

This plant exhibits a specific distribution pattern across several regions of the African continent. In West Tropical Africa, its presence is documented in the nations of Benin, Ghana, Togo, and Nigeria. Beyond the western coast, its range extends further into the interior of the continent. Specifically, it can be found within West-Central Tropical Africa. This includes its occurrence in the Central African Republic.

Sources: The World Checklist of Vascular Plants (WCVP)

Botanical Identification

Ecology

The ecology of Tabernaemontana pachysiphon is characterized by its preference for high-moisture environments and stable microclimates. This species is primarily found inhabiting moist forests and forest margins, where it thrives in the transitional zones between dense canopy cover and more open edges. It is particularly well-adapted to riverine and gallery forest ecosystems, where the consistent availability of water and the shade provided by riparian vegetation support its growth requirements. By occupying these specific niches, the plant benefits from the nutrient-rich soils and the humid atmospheric conditions typical of forested corridors and watercourse margins.

Habitat :

moist forest and forest margins, riverine and gallery forest

Life history

The life history of Tabernaemontana pachysiphon is characterized by its nature as a perennial plant, allowing it to persist through multiple growing seasons. As a phanerophyte, its buds are borne on significant woody branches above the ground, and it specifically exhibits a nanophanerophyte growth habit, maintaining a relatively low stature while still preserving its reproductive structures on elevated stems. This species maintains a consistent foliage profile as an evergreen, ensuring that its leaves remain functional throughout the year without the seasonal shedding seen in deciduous species.

Deciduousness :

evergreen

Life form :

nanophanerophyte

Life form :

phanerophyte

Lifecycle :

perennial

Morphology

The morphology of Tabernaemontana pachysiphon is characterized by a woody growth form, primarily developing as a self-supporting tree. As a terrestrial species, it functions as an independent organism rather than a parasite or an epiphyte. The plant exhibits significant vertical development, with its height ranging from a minimum of approximately 2.74 m to a maximum of roughly 9.75 m, maintaining an average height of about 9 m. Unlike climbing vines or lianas, it is a self-supporting structure that does not require external support to maintain its upright stature.

Aquatic :

terrestrial

Climber :

self-supporting

Epiphyte :

terrestrial

Growth form :

tree

Parasite :

independent

Plant height max:

9.753718605 m

Plant height mean:

9 m

Plant height min:

2.743233358 m

Woodiness :

woody

Physiology

The physiology of Tabernaemontana pachysiphon is characterized by complex metabolic pathways and specialized nutrient acquisition strategies typical of the Apocynaceae family. As a perennial woody shrub, its physiological processes are centered around efficient photosynthetic activity and the secondary metabolism required to produce various indole alkaloids. Regarding its interaction with soil nutrients, the plant does not engage in symbiotic nitrogen fixation; it is not a nitrogen fixer, meaning it lacks the specialized root nodules containing diazotrophic bacteria necessary to convert atmospheric nitrogen into bioavailable forms. Instead, its physiological survival relies on the active uptake of nitrates and ammonium from the soil through its root system. The plant manages its water potential and transpiration rates through regulated stomatal conductance, ensuring metabolic stability in varying environmental conditions, while its internal transport mechanisms facilitate the distribution of synthesized alkaloids throughout its tissues.

Nitrogen fixer :

no

Sources: Global Inventory of Floras and Traits (GIFT)

Plant Parts

Tabernaemontana pachysiphon 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 root.

Root

1. Journal of pharmaceutical sciences

Chemicals

Tabernaemontana pachysiphon has 10 reported phytochemicals identified across 1 scientific publications and several other databases. The most consistently reported chemicals include 19-(2-Oxopropyl)conodurine, 19-Oxoconodurine, CORONARIDINE, Conoduramine, Conodurine.

19-(2-Oxopropyl)conodurine

1. Journal of pharmaceutical sciences

19-Oxoconodurine

1. Journal of pharmaceutical sciences

CORONARIDINE

1. Journal of pharmaceutical sciences

Conoduramine

1. Journal of pharmaceutical sciences

Conodurine

1. Journal of pharmaceutical sciences

GABUNINE

1. Journal of pharmaceutical sciences

Pericyclivine

1. Journal of pharmaceutical sciences

Perivine

1. Journal of pharmaceutical sciences

Vobasine

1. Journal of pharmaceutical sciences

indole

1. Journal of pharmaceutical sciences

Activities

Tabernaemontana pachysiphon has 2 reported activities identified across 1 scientific publications and several other databases. The most consistently reported activities include Antileukemic, Cytotoxic.

Antileukemic

1. Journal of pharmaceutical sciences

Cytotoxic

1. Journal of pharmaceutical sciences

Medicinal Uses

Tabernaemontana pachysiphon has 1 reported medicinal uses identified across 1 scientific publications and several other databases. The most consistently reported uses include malaria.

Most Reported Uses