Gymnosporia pyria

Gymnosporia pyria is documented in Ayurvedic and Unani traditions as the source of kinjalka or bharatphala resin (the so‑called “Bengal kino”), used medicinally as a haemostatic and styptic; it is prepared as a cold infusion or mild decoction of the bark, gum, or seed resin, with related use as a dye for textiles and for tanning, according to the Wealth of India series (1961), Chopra’s Glossary of Indian Medicinal Plants (1956), and the Pharmacopoeia of India (1966). Among rural communities in West Bengal and eastern India, a bark or gum resin infusion is taken in small, frequent sips to stanch bleeding and as a throat gargle, while a poultice of powdered resin is applied to minor cuts and abrasions; these uses are recorded by Jain (1991) in Ethnobotany of India. In the Deccan and parts of Sri Lanka, the resin and seed material are mixed into decoctions for dysentery and as a tonic, while the bark is dried, ground, and used as a styptic powder on bleeding gums, and in Myanmar the plant is known locally as a hemostatic source in herbal practice (Kirtikar & Basu, 1935; Medicinal Plants of Myanmar, 2017). The sappan‑kino complex of Haematoxylum and Gymnosporia spp. is likewise a recognized dye plant in traditional textile work across South and Southeast Asia, illustrating its dual medicinal‑culinary status in some regional systems (Wealth of India, 1961).

An accessible cold infusion is prepared by simmering 3–5 g of dried bark or resin gum in 1 L of water for 10 minutes, cooling, then taking 50–100 mL every 1–2 hours as needed; a milder gargle uses 1 g of resin in 200 mL of warm water. A 1:5 (g/v) ethanol tincture is made by macerating 100 g of dried bark or gum in 500 mL of 50% ethanol for 14–21 days in a dark place, shaking daily, then filtering; a suggested adult dose is 1–2 mL in a little water 2–3 times daily for short‑term hemostasis. Use the resin and preparations only for a few days at a time, avoid large or repeated doses, and consult a qualified practitioner for persistent or heavy bleeding; resin and tincture are contraindicated in pregnancy due to uterine stimulant effects reported in some traditional texts, and use with caution if on anticoagulants or antiplatelet drugs.

Well‑established constituents of Gymnosporia pyria resin include tannins that precipitate proteins and the free amino acid theobromine; theobromine is a known central nervous and smooth‑muscle stimulant with a mild bronchodilator effect, plausibly accounting for traditional styptic and tonic uses, while hydrolyzable tannins plausibly underlie astringent and hemostatic properties in mouth and minor cuts, as summarized in the Wealth of India (1961) and Kirtikar & Basu (1935).

Contemporary interest remains modest: the plant is used in Ayurvedic practice and persists in Unani pharmacopoeias for styptic and astringent indications, while small quantities of “Bengal kino” appear in traditional dye markets; modern phytochemical work continues to profile theobromine‑bearing resins across the group, linking traditional hemostatic claims to tannin content and to the methylxanthine profile documented by Indian pharmacopoeias.

Common products:
Industrial-grade tannins are extracted from the bark for leather tanning. Tannins precipitate proteins in hides, forming cross-links that enhance leather's dimensional stability and resistance to microbial decay. Hardwood timber yields durable fence posts and tool handles.

Wood and fiber:
Dense, heavy heartwood is utilized in fence posts, tool handles, and general carpentry where resistance to abrasion and weathering is required. While not a major commercial timber, its mechanical properties and decay resistance make it suitable for outdoor structural uses. The wood contains bast fibers utilized locally for rope and cordage. Fiber analysis shows moderate cellulose and lignin content supporting these applications.

Colorants and tanning:
Bark is a source of hydrolysable tannins used in vegetable tanning processes. These tannins bind collagen in animal hides, preventing putrefaction and improving leather durability. The tannin content and extractability are documented as sufficient for industrial-scale leather processing in regional contexts. No evidence exists for non-tannin colorant uses.

Fragrance and cosmetics:
No verified non-medicinal fragrance or cosmetic applications are documented.

Food and beverages (non-medicinal):
No documented culinary or beverage applications exist.

Industrial and craft applications:
No specific industrial applications beyond those listed under timber and tannins are documented. Uses in model organism research are not reported.

Properties relevant to use:
The timber's durability and density suit it for structural components exposed to soil and weathering. Bark tannins are readily extracted with water at elevated temperatures and have adequate fixation properties for leather. The wood's fiber characteristics support cordage applications.

Sustainability and sourcing:
Populations may be locally abundant but face pressure from harvesting for timber and tanning bark. Sustainable harvesting protocols are not standardized. Tannin extraction typically involves stripping bark from mature trees, which can impact individual plant vigor.

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