Himalayan Rhubarb

Names and Synonyms

Common Names

• Himalayan Rhubarb
• Red-veined Pie Plant
• Indian rhubarb

Scientific Names

Accepted name

Regional and Traditional Names

Sources: Wikidata, Catalogue of Life

Taxonomical Classification

This plant belongs to the kingdom Plantae and is classified within the phylum Streptophyta and class Equisetopsida. As a member of the subclass Magnoliidae and order Caryophyllales, it falls under the family Polygonaceae. Specifically, its taxonomic identity is defined by the genus Rheum.

Sources: The World Checklist of Vascular Plants (WCVP)

Distribution

This plant exhibits a wide geographical distribution across several high-altitude regions of Asia. In China, it is specifically found growing within the Tibet region. Its presence extends into the Indian Subcontinent, where it inhabits the East Himalaya and the West Himalaya. Furthermore, the species can be located throughout the mountainous terrain of Nepal. Finally, it is also documented to occur within the territory of Pakistan.

Sources: The World Checklist of Vascular Plants (WCVP)

Botanical Identification

Ecology

The ecology of Rheum australe is defined by its specialization within high-altitude alpine environments, where it occupies a specific vertical niche in the landscape. This species thrives within a distinct elevational range, typically found at altitudes starting from a minimum of 3200 m AMSL. It demonstrates a strong preference for high-mountain ecosystems, with a mean elevation of occurrence situated at 3850 m AMSL. The species reaches its upper ecological limit at a maximum elevation of 4300 m AMSL, indicating its ability to withstand the extreme physiological stressors, such as intense UV radiation and low temperatures, characteristic of the highest alpine zones.

Elevational range max:

4300 m AMSL

Elevational range mean:

3850 m AMSL

Elevational range min:

3200 m AMSL

Life history

The life history of Rheum australe is characterized by its status as a perennial species, allowing it to persist in its habitat over multiple growing seasons. As a perennial, the plant does not complete its life cycle in a single season but instead undergoes recurring cycles of vegetative growth and dormancy, which enables it to build substantial energy reserves within its root system. This long-lived nature allows it to establish a stable presence in its specific ecological niche, often navigating seasonal environmental fluctuations through sustained physiological processes. Through its perennial lifecycle, the plant can engage in repeated reproductive efforts over several years, contributing to its long-term survival and population stability.

Lifecycle :

perennial

Morphology

The morphology of Rheum australe is characterized by its growth form as a non-woody herb, functioning as a self-supporting plant that does not require climbing structures. It is a terrestrial species, growing independently without parasitic or epiphytic tendencies. In terms of stature, the plant exhibits significant variation in size, with a minimum height of 0.7 m, a mean height of approximately 1.35 m, and a maximum height reaching up to 2 m.

Aquatic :

terrestrial

Climber :

self-supporting

Epiphyte :

terrestrial

Growth form :

herb

Parasite :

independent

Plant height max:

2 m

Plant height mean:

1.35 m

Plant height min:

0.7 m

Woodiness :

non-woody

Reproduction

The reproduction of Rheum australe is characterized by the development of distinct fruiting structures and specific seed metrics. The fruits produced by this species exhibit a consistent size range, with lengths typically measuring between 9 cm and 10 cm, maintaining a mean length of approximately 9.5 cm. In terms of breadth, the fruit width varies from a minimum of 7 cm to a maximum of 8.5 cm, with an average width of 7.75 cm. The seeds resulting from this reproductive process are remarkably uniform in their physical properties; the seed mass is highly consistent, with a mean, minimum, and maximum value all recorded at 0.01816 g, indicating a very low level of variance in individual seed weight.

Fruit length max:

10 cm

Fruit length mean:

9.5 cm

Fruit length min:

9 cm

Fruit width max:

8.5 cm

Fruit width mean:

7.75 cm

Fruit width min:

7 cm

Seed mass mean:

0.01816 g

Sources: Global Inventory of Floras and Traits (GIFT)

Chemicals

Rheum australe has 23 reported phytochemicals identified across 0 scientific publications and several other databases. The most consistently reported chemicals include Aloe emodin, Anthraquinones, Chrysophanol, Flavonoids, Physcion.

Aloe emodin

1. Molecules (Basel, Switzerland)
2. Phytochemistry reviews : proceedings of the Phytochemical Society of Europe

Anthraquinones

1. Journal of ethnopharmacology
2. Phytochemistry reviews : proceedings of the Phytochemical Society of Europe

Chrysophanol

1. Molecules (Basel, Switzerland)
2. Phytochemistry reviews : proceedings of the Phytochemical Society of Europe

Flavonoids

1. Journal of ethnopharmacology
2. Phytochemistry reviews : proceedings of the Phytochemical Society of Europe

Physcion

1. Molecules (Basel, Switzerland)
2. Phytochemistry reviews : proceedings of the Phytochemical Society of Europe

emodin

1. Molecules (Basel, Switzerland)
2. Phytochemistry reviews : proceedings of the Phytochemical Society of Europe

2,5-dimethyl-7-hydroxychromone

1. Molecules (Basel, Switzerland)

7-Hydroxy-2-(2'-hydroxypropyl)-5-methylchromone

1. Molecules (Basel, Switzerland)

Amabiloside

1. Molecules (Basel, Switzerland)

Chromones

1. Journal of ethnopharmacology

Activities

Rheum australe has 6 reported activities identified across 0 scientific publications and several other databases. The most consistently reported activities include Anticancer, Antidiabetic, Antifungal, Antimicrobial, Antioxidant.

Anticancer

1. Journal of ethnopharmacology

Antidiabetic

1. Journal of ethnopharmacology

Antifungal

1. Journal of ethnopharmacology

Antimicrobial

1. Journal of ethnopharmacology

Antioxidant

1. Journal of ethnopharmacology

Hepatoprotective

1. Journal of ethnopharmacology

Medicinal Uses

Rheum australe has 3 reported medicinal uses identified across 0 scientific publications and several other databases. The most consistently reported uses include infectious diseases, antidiabetic, antioxidant.

Most Reported Uses

Preparations