Rhododendron yunnanense

Names and Synonyms

Scientific Names

Accepted name

Synonyms

• Azalea yunnanensis

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 Ericales, it falls under the family Ericaceae. Specifically, it is categorized within the genus Rhododendron.

Sources: The World Checklist of Vascular Plants (WCVP)

Distribution

This plant exhibits a broad geographical distribution spanning across several distinct regions in Asia. In China, it is widely found throughout the South-Central and North-Central provinces. Its habitat also extends into the high-altitude terrains of Tibet. Moving south, the species is present within the East Himalaya region of the Indian Subcontinent. Finally, its range reaches into the Indo-China region, specifically within Myanmar.

Sources: The World Checklist of Vascular Plants (WCVP)

Botanical Identification

Ecology

The ecology of Rhododendron yunnanense is characterized by its presence in high-altitude montane environments, where it occupies specific niche habitats within its vertical distribution. This species thrives across a broad altitudinal gradient, typically found at elevations ranging from a minimum of 2200 m AMSL to a maximum of 4000 m AMSL. The distribution of the species centers around a mean elevation of 2900 m AMSL, suggesting that it is most ecologically dominant in mid-to-high montane zones. These elevations often correspond to temperate or subalpine climates, where the plant must adapt to varying levels of solar radiation, moisture availability, and temperature fluctuations inherent to high-mountain ecosystems.

Elevational range max:

4000 m AMSL

Elevational range mean:

2900 m AMSL

Elevational range min:

2200 m AMSL

Life history

The life history of Rhododendron yunnanense is characterized by its status as a perennial species, meaning it lives for many years and undergoes repeated seasonal cycles of growth and dormancy. As a deciduous plant, it undergoes a distinct phenological shift each year, shedding its foliage during colder or drier periods to conserve energy and moisture, only to regrow new leaves during the favorable growing season. This cycle of seasonal leaf senescence and regrowth is fundamental to its survival in its native high-altitude habitats, allowing the plant to manage resource allocation over its long lifespan.

Deciduousness :

deciduous

Lifecycle :

perennial

Morphology

The morphology of Rhododendron yunnanense is characterized by its growth form as a woody shrub. It is a self-supporting plant that does not exhibit climbing habits, maintaining a structural integrity through its woody nature. In terms of stature, the plant typically reaches an average height of 1.5 m, though its size can vary depending on environmental conditions, ranging from a minimum of 1 m to a maximum height of 2 m.

Climber :

self-supporting

Growth form :

shrub

Plant height max:

2 m

Plant height mean:

1.5 m

Plant height min:

1 m

Woodiness :

woody

Physiology

The physiological characteristics of the foliage in Rhododendron yunnanense are defined by a specific range of leaf dimensions that facilitate its metabolic processes. The leaves exhibit a varied morphology, with lengths ranging from a minimum of 2.5 cm to a maximum of 7 cm, maintaining a mean leaf length of approximately 4.75 cm. In terms of transverse development, the leaf width varies between a minimum of 0.8 cm and a maximum of 3 cm. These specific leaf dimensions contribute to the plant's surface area for photosynthesis and transpiration, reflecting an adaptive structural strategy within its ecological niche.

Leaf length max:

7 cm

Leaf length mean:

4.75 cm

Leaf length min:

2.5 cm

Leaf width max:

3 cm

Leaf width min:

0.8 cm

Reproduction

The reproduction of Rhododendron yunnanense is characterized by the development of distinct fruit structures that vary significantly in size. The resulting fruits exhibit a measurable range in dimensions, with a minimum recorded length of 0.6 cm and a maximum length reaching up to 2 cm. On average, the fruit length typically measures approximately 1.3 cm, reflecting the natural morphological variability inherent in the plant's reproductive cycle.

Fruit length max:

2 cm

Fruit length mean:

1.3 cm

Fruit length min:

0.6 cm

Sources: Global Inventory of Floras and Traits (GIFT)

Chemicals

Rhododendron yunnanense has 1 reported phytochemicals identified across 0 scientific publications and several other databases. The most consistently reported chemicals include Al.

Al

1. Frontiers in plant science