Caucasian wingnut

Names and Synonyms

Common Names

• Caucasian Wingnut
• Caucasian Walnut

Scientific Names

Accepted name

Synonyms

• Pterocarya spachiana
• Pterocarya caucasica
• Wallia fraxinifolia
• Pterocarya pterocarpa
• Pterocarya caucasica var. dumosa
• Pterocarya fraxinifolia var. dumosa
• Rhus obscura
• Juglans fraxinifolia

Regional and Traditional Names

Sources: Wikidata, Catalogue of Life

Taxonomical Classification

This plant belongs to the kingdom Plantae and the phylum Streptophyta, specifically categorized under the class Equisetopsida and subclass Magnoliidae. Within the order Fagales and the family Juglandaceae, it is classified under the genus Pterocarya.

Sources: The World Checklist of Vascular Plants (WCVP)

Distribution

This plant exhibits a specific geographical distribution across several European regions. In Northern Europe, its presence can be found within the territories of Finland, Sweden, and Great Britain. Moving toward the center of the continent, it is also documented in Middle Europe. Specifically, the species is located within the borders of Belgium. Finally, its range extends into Germany, marking its presence in Middle Europe.

Sources: The World Checklist of Vascular Plants (WCVP)

Botanical Identification

Ecology

The ecology of Pterocarya fraxinifolia is characterized by its preference for highly specific, moisture-rich environments, typically occurring in boggy or inundated places within mixed woods situated near rivers. While it is frequently found integrated into diverse forest compositions, it is a distinctive component of these riparian zones, occasionally forming small, pure stands where conditions are optimal. This preference for saturated soils and proximity to flowing water suggests a niche dependency on high water tables and the specific hydrological dynamics found in alluvial or wetland forest ecosystems.

Habitat :

Boggy or inundated places in mixed woods near rivers, rarely forming small pure stands

Morphology

The morphology of Pterocarya fraxinifolia is characterized by its robust growth form as a woody tree. It typically reaches a significant stature, with a plant height ranging from a minimum of 25 meters to a maximum of 30 meters.

Growth form :

tree

Plant height max:

30 m

Plant height min:

25 m

Woodiness :

woody

Physiology

The physiology of Pterocarya fraxinifolia is characterized by a metabolic framework centered on the C3 photosynthetic pathway, which dictates its carbon fixation processes and gas exchange mechanisms. Under this C3 pathway, the plant utilizes the enzyme Ribulose-1,5-bisphosphate carboxylase/oxygenase (RuBisCO) to fix atmospheric carbon dioxide directly into three-carbon compounds during the Calvin cycle. This physiological strategy makes the plant particularly sensitive to photorespiration, especially under high-temperature or water-limiting conditions, where the oxygenase activity of RuBisCO may increase. Consequently, its physiological efficiency is closely tied to its ability to manage transpiration rates and maintain leaf water potential to optimize the balance between CO2 uptake and moisture loss. The metabolic regulation of this species involves complex enzymatic activities that support its growth patterns and seasonal adaptations within its natural riparian habitats.

Photosynthetic pathway :

C3

Reproduction

The reproduction of Pterocarya fraxinifolia is characterized by a specific seasonal flowering window and a specialized seed dispersal mechanism. The flowering process typically commences in April and reaches its conclusion in May, though the timing can be variable across different environmental conditions. Following pollination, the plant produces seeds with a very consistent and lightweight profile; the seed mass remains constant with a mean, maximum, and minimum value of 0.05 g. To ensure the spread of its offspring, the species employs an anemochorous dispersal syndrome, relying on wind currents to transport its light seeds away from the parent plant.

Dispersal syndrome :

anemochorous

Flowering time :

Apr

Flowering time :

May

Seed mass mean:

0.05 g

Sources: Global Inventory of Floras and Traits (GIFT)

Plant Parts

Pterocarya fraxinifolia 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 leaf.

Leaf

1. Pakistan journal of biological sciences : PJBS

Chemicals

Pterocarya fraxinifolia has 5 reported phytochemicals identified across 1 scientific publications and several other databases. The most consistently reported chemicals include Bisabolol oxide A, Flavonoid, Monoterpenes, Sesquiterpenes, juglone.

Bisabolol oxide A

1. Pakistan journal of biological sciences : PJBS

Flavonoid

1. Pakistan journal of biological sciences : PJBS

Monoterpenes

1. Pakistan journal of biological sciences : PJBS

Sesquiterpenes

1. Pakistan journal of biological sciences : PJBS

juglone

1. Anti-inflammatory & anti-allergy agents in medicinal chemistry

Activities

Pterocarya fraxinifolia has 2 reported activities identified across 1 scientific publications and several other databases. The most consistently reported activities include Antimicrobial, Antioxidant.

Antimicrobial

1. Anti-inflammatory & anti-allergy agents in medicinal chemistry

Antioxidant

1. Anti-inflammatory & anti-allergy agents in medicinal chemistry

Medicinal Uses

Pterocarya fraxinifolia has 2 reported medicinal uses identified across 1 scientific publications and several other databases. The most consistently reported uses include Inflammatory Bowel Disease, colitis.

Most Reported Uses

Preparations