Fascinating Danxia Phoenix Tree: Basics, Types, Growth & Care

Firmiana danxiaensis, or Danxia Phoenix Tree, is a species endemic to the Danxia landform. It is a small deciduous tree that grows between 5 to 10 meters tall. Its bark is black-brown, the young branches are cylindrical, green, and hairless. The leaves are nearly round, thin leathery, hairless on both surfaces, with 5 to 7 basal veins on each surface.

The tree grows on thin-soiled red sandstone and is noted for its beautiful shape, rapid growth, and strong sprouting ability. The Danxia Phoenix Tree is large, and its flowers are tender purple and magnificent, making it suitable for cultivating as an ornamental tree for courtyards, greening along roads, and as a pioneer species for afforestation.

The Danxia Phoenix Tree has been designated as a national rare and endangered plant and a second-level key protected wild plant.

Morphological Features

The Danxia Phoenix Tree is a small deciduous tree that grows 5-10 meters tall with black-brown bark and cylindrical, green, hairless young branches. The leaves are nearly round, thin-leathery, hairless on both sides, and have 5-7 basal veins that are raised on both sides. It blooms annually from May to June, with flowers forming in apical conical inflorescences that are up to 20-30 cm long, densely covered with yellow star-shaped soft hairs.

The flowers are purple-red and there are male and female flowers; the calyx is 5 shallowly divided, the sepals are linear-oblong, about 1 cm long; the anthers of male flowers are born at the top of the stamen stalk, and the ovary of the female flowers is nearly spherical, densely covered with star-shaped soft hairs.

The fruit is a septicidal capsule that splits open before maturing, it is ovate-lanceolate, and each capsule has 2-3 seeds; the seeds are spherical and light brown.

The Danxia Phoenix Tree mainly grows in the rock crevices of cliffs and in the shallow soil layers of valleys, often accompanied by plants such as little stonecrop, gold needle flower, resurrection plant, and lilies. Due to the narrow distribution area and human disturbances, the existing population is not large.

When it was first discovered in Danxia Mountain in 1987, there were less than 100 individuals, and it was in a state of endangerment.

The Danxia Phoenix Tree is drought-tolerant and thin-soil-tolerant, and its roots can grow very firmly in the crevices of rocks or on cliffs with a little soil, and its branches and leaves are also lush, somewhat resembling the tenacity of a pine tree.

Every May and June, the Danxia Phoenix Tree blossoms in patches, creating a beautiful scene. However, as there are very few Danxia Phoenix Trees, even on Danxia Mountain, this spectacular sight is not common. Visitors to Danxia Mountain can pay special attention to this rare plant.

The local scenic area has set up viewing platforms on the cliff on the east side of the Elder Peak for tourists to enjoy. Elder Peak Scenic Area is the main peak of the narrow Danxia Mountain, and one of the earliest developed tourist areas in the Danxia Mountain Scenic Area.

The climate and soil in this area have typical Danxia characteristics, and it is the best natural environment for the growth of Danxia Phoenix Trees, forming a landscape of plant communities.

Distribution Range

Firmiana danxiaensis, a member of the Sterculiaceae family, is endemic to the Renhua Danxia Mountain Nature Reserve in Shaoguan. It primarily grows in the thin soil layers of rock walls and valleys. Its name derives from its place of first discovery: Danxia Mountain, where it continues to exist exclusively within Danxia landform regions.

Danxia Mountain, a World Natural Heritage site, is renowned not only for its unique natural scenery but also its rich forest ecosystem and myriad rare plant species. Among the eight distinct plant species in the Danxia landform and nine endangered species under key national protection, Firmiana danxiaensis stands out as the most famous, eye-catching, and precious.

As for why Firmiana danxiaensis is only found on Danxia landform, no consensus has been reached. The habitat of Firmiana danxiaensis is inseparable from the climate, soil, and landform of Danxia Mountain, especially the soil.

Danxia Mountain, located in the mid-subtropical monsoon climate zone, has red soil and an average annual temperature of 19.6℃. It has no severe cold in winter or extreme heat in summer. The annual rainfall of 1660.5 mm promotes the formation and development of subtropical evergreen broad-leaved forests.

The preservation of the originality and diversity of the local biosphere is well-maintained, with minimal human interference and damage, providing a safeguard for Firmiana danxiaensis growth. The Danxia landform also likely plays a significant role in influencing its growth.

Main Value

Firmiana danxiaensis is a tall plant with striking tender purple flowers, making it suitable for cultivation as a decorative tree for courtyards, a greenery tree along roads, and a pioneer species for afforestation.

Experts have been studying it with hopes of introducing it to common households from its secluded mountain abode. Plant experts have been collecting soil from Danxia Mountain and performing molecular measurements in an attempt to unravel the mystery of why Firmiana danxiaensis only grows on Danxia Mountain.

Ornamental Value

When the Danxia blooms, it creates a picturesque beauty of high ornamental value, making it suitable for cultivation as a decorative tree for courtyards, a greenery tree along roads, and a pioneer species for afforestation. Firmiana danxiaensis is a tall plant with striking tender purple flowers, making it suitable for cultivation as a decorative tree for courtyards, a greenery tree along roads, and a pioneer species for afforestation.

Ecological Value

Firmiana danxiaensis serves as a significant indicator plant for the most noticeable seasonal changes in Danxia Mountain and even in Lingnan.

Current Conservation Status

Protection Level

It is listed in the Chinese National Second-Class Protected Plant Directory and the International Union for Conservation of Nature (IUCN) Red List as critically endangered (CR).

Population Status

Firmiana danxiaensis is listed as critically endangered in the Chinese Species Red List and is a second-class key protected wild plant nationally. The Elder Peak Scenic Area in Danxia Mountain, Guangdong, provides the most suitable natural environment for Firmiana danxiaensis.

It mainly grows in the crevices of rock walls and thin soil layers in valleys. It is drought-resistant, thrives in infertile conditions, and can robustly grow in rock crevices or on rock faces with just a little bit of soil. Its roots are sturdy, and its leaves are lush, akin to the resilience of a pine tree.