Catalpa longissima

Names and Synonyms

Scientific Names

Accepted name

Distribution

This plant exhibits a diverse geographical distribution that spans across several distinct oceanic regions. Within the Malesia region, it can be found growing in the Philippines. Its range extends into the Northwestern Pacific, specifically inhabiting the Mariana Islands. Moving toward the North-Central Pacific, the species is also present in Hawaii. Finally, it reaches the Caribbean, where it is located in both the Bahamas and the Cayman Islands.

Sources: The World Checklist of Vascular Plants (WCVP)

Botanical Identification

Ecology

The ecology of Catalpa longissima is characterized by its specific adaptation to montane environments, thriving within a distinct altitudinal niche. This species is primarily found in high-altitude habitats, occupying an elevational range that begins at 1000 m AMSL and extends up to a maximum of 1500 m AMSL. Within this vertical belt, the plant's distribution is governed by the specific climatic and edaphic conditions found in these mid-to-high elevation zones, where temperature gradients and moisture availability are optimized for its growth and reproductive success.

Elevational range max:

1500 m AMSL

Elevational range min:

1000 m AMSL

Life history

The life history of Catalpa longissima is characterized by its classification as a perennial organism, meaning it lives for multiple years and maintains its biological functions through successive growing seasons. As a phanerophyte, the plant's perennating buds are located high above the ground on woody stems or branches, a structural adaptation that allows it to survive seasonal environmental stressors. This phanerophyte life form ensures that the plant can sustain its growth and reproductive cycles over an extended lifespan, contributing to its long-term presence within its natural ecological niche.

Life form :

phanerophyte

Lifecycle :

perennial

Morphology

The morphology of Catalpa longissima is characterized by its stature as a large, woody tree, capable of reaching an average height of approximately 25 m. As a terrestrial species, it maintains an independent existence, functioning as a non-parasitic organism rather than an obligatory or facultative parasite. The plant exhibits a self-supporting growth habit, lacking the climbing characteristics of a liana or vine, and is strictly terrestrial in its ecological niche, showing no epiphyte tendencies such as hemi-epiphytic or holoepiphytic growth. Its structural integrity is defined by its woody composition, which supports its significant vertical development.

Aquatic :

terrestrial

Climber :

self-supporting

Epiphyte :

terrestrial

Growth form :

tree

Parasite :

independent

Plant height mean:

25 m

Woodiness :

woody

Physiology

The physiology of Catalpa longissima is characterized by its metabolic processes and nutrient acquisition strategies. As a woody angiosperm, it utilizes the C3 photosynthetic pathway, a mechanism where carbon dioxide is fixed directly into a three-carbon compound during the Calvin cycle, typically occurring under moderate temperature and moisture conditions. Furthermore, this species does not function as a nitrogen fixer, meaning it lacks the specialized symbiotic relationships with nitrogen-fixing bacteria, such as Rhizobium, required to convert atmospheric nitrogen into bioavailable forms; instead, it relies on the uptake of nitrates and ammonium present in the soil through its root system.

Nitrogen fixer :

no

Photosynthetic pathway :

C3

Reproduction

The reproduction of Catalpa longissima is driven by a biotic pollination syndrome, relying on living organisms rather than abiotic factors to facilitate the transfer of pollen. This process is primarily mediated by insects, which play a crucial role in the plant's reproductive cycle. Specifically, the species exhibits a strong affinity for bee pollination, utilizing these specialized pollinators to ensure successful fertilization. By employing these biotic mechanisms, the plant effectively coordinates the movement of genetic material through insect interactions to complete its reproductive stages.

Pollination syndrome :

insect

Pollination syndrome :

bee

Pollination syndrome :

biotic

Sources: Global Inventory of Floras and Traits (GIFT)

Chemicals

Catalpa longissima has 4 reported phytochemicals identified across 0 scientific publications and several other databases. The most consistently reported chemicals include BETA-SITOSTEROL, Tannins, p-hydroxy benzoic acid, polyphenols.

BETA-SITOSTEROL

1. Dr. Duke

Tannins

1. Dr. Duke

p-hydroxy benzoic acid

1. Dr. Duke

polyphenols

1. Dr. Duke

Activities

Catalpa longissima has 73 reported activities identified across 0 scientific publications and several other databases. The most consistently reported activities include Androgenic, Angiogenic, Anorexic, Anthelmintic, AntiHIV.

Androgenic

1. Dr. Duke

Angiogenic

1. Dr. Duke

Anorexic

1. Dr. Duke

Anthelmintic

1. Dr. Duke

AntiHIV

1. Dr. Duke

Antiadenomic

1. Dr. Duke

Antiandrogenic

1. Dr. Duke

Antiangiogenic

1. Dr. Duke

Antibacterial

1. Dr. Duke

Anticancer (Breast)

1. Dr. Duke