Poison Bulb

Names and Synonyms

Common Names

• Asiatic poisonbulb
• poisonbulb
• Tree Crinum

Scientific Names

Accepted name

Synonyms

• Bulbine asiatica
• Crinum toxicarium var. asiaticum

Regional and Traditional Names

Sources: Wikidata, Catalogue of Life

Taxonomical Classification

This plant belongs to the kingdom Plantae and the phylum Streptophyta, falling under the class Equisetopsida and subclass Magnoliidae. Within the order Asparagales, it is classified under the family Amaryllidaceae. Finally, it is identified by its specific genus, Crinum.

Sources: The World Checklist of Vascular Plants (WCVP)

Distribution

This plant exhibits a specific geographical distribution concentrated within the Western Indian Ocean. It can be found growing across the diverse landscapes of the Comoros islands. Additionally, the species is established in the various territories of Mauritius and Réunion. Its presence extends to the remote islands of the Chagos Archipelago as well. Finally, the plant is widely distributed throughout the large landmass of Madagascar.

Sources: The World Checklist of Vascular Plants (WCVP)

Botanical Identification

Ecology

The ecology of Crinum asiaticum is characterized by its ability to thrive within halophytic vegetation, where it adapts to the saline conditions often found in coastal and maritime environments. It is frequently observed colonizing dense secondary shrublands, where it competes for space and light among established woody species. Furthermore, the plant demonstrates significant resilience in ruderal vegetation, successfully establishing itself in disturbed sites, wasteland, or areas characterized by frequent human interference and nutrient-rich, opportunistic soil conditions.

Habitat :

halophytic vegetation, dense secondary shrub and ruderal vegetation

Life history

The life history of Crinum asiaticum is characterized by its existence as a perennial plant, allowing it to persist through multiple growing seasons. As a member of the cryptophyte group, its regenerative organs are located safely underground, protected from environmental stressors. Specifically, it functions as a geophyte, utilizing a large, fleshy bulb to store essential nutrients and water, which ensures its survival during periods of dormancy or unfavorable conditions.

Life form :

geophyte

Life form :

cryptophyte

Lifecycle :

perennial

Morphology

The morphology of Crinum asiaticum is characterized by its growth form as a non-woody herb and forb, exhibiting a self-supporting structure rather than acting as a climber or vine. As a terrestrial plant, it exists independently of other organisms, functioning as an independent species rather than a parasite or epiphyte. The plant typically reaches a mean height of 1.2 m, though its stature can vary with a recorded maximum height of 0.45 m in specific developmental stages or environmental contexts. Its physical structure is defined by its non-woody composition, contributing to its herbaceous habit.

Aquatic :

terrestrial

Climber :

self-supporting

Epiphyte :

terrestrial

Growth form :

herb

Growth form :

forb

Parasite :

independent

Plant height max:

0.45 m

Plant height mean:

1.2 m

Woodiness :

non-woody

Physiology

The physiology of Crinum asiaticum is characterized by its distinct morphological and metabolic profiles, particularly concerning its foliar structure and nutrient acquisition strategies. The plant features elongated, strap-shaped leaves that exhibit significant dimensional variability, with leaf lengths ranging from a minimum of 50 cm to a maximum of 120 cm. These leaves possess a width that fluctuates between a minimum of 5 cm and a maximum of 15 cm, providing an expansive surface area for photosynthetic activity. Despite their robust appearance, the plant does not exhibit succulence, meaning it lacks the specialized thickened tissues typically used for water storage in arid-adapted species. Furthermore, from a biochemical and symbiotic standpoint, Crinum asiaticum is not a nitrogen fixer, relying instead on the assimilation of available nitrogen from the soil through its root system rather than through symbiotic relationships with nitrogen-fixing bacteria.

Leaf length max:

120 cm

Leaf length min:

50 cm

Leaf width max:

15 cm

Leaf width min:

5 cm

Nitrogen fixer :

no

Succulence :

no

Reproduction

The reproduction of Crinum asiaticum is driven by complex biological interactions involving both biotic and abiotic processes. The plant utilizes a biotic pollination syndrome, relying heavily on insect vectors to facilitate the transfer of pollen. Specifically, the pollination process is characterized by insect-mediated movement, where various insect species play a vital role in ensuring successful fertilization. Following successful pollination and the development of seeds, the plant employs a hydrochorous dispersal syndrome. This means that the dispersal of its seeds is primarily facilitated by water, utilizing water currents to transport the offspring to new habitats, a mechanism categorized under its specialized hydrochorous dispersal strategy.

Dispersal syndrome :

hydrochorous

Pollination syndrome :

insect

Pollination syndrome :

biotic

Sources: Global Inventory of Floras and Traits (GIFT)

Activities

Crinum asiaticum has 1 reported activities identified across 0 scientific publications and several other databases. The most consistently reported activities include Antifungal.

Antifungal

1. Journal of plant physiology

Conditions

Crinum asiaticum has 4 reported investigations on conditions identified across 0 scientific publications and several other databases. The most consistently reported conditions include Mycobacterium smegmatis, Mycobacterium tuberculosis, cervical cancer, inflammation.

Mycobacterium smegmatis

1. Scientific reports

Mycobacterium tuberculosis

1. Scientific reports

Cervical cancer

1. Biomolecules

Inflammation

1. Immunopharmacology