What is Mitragyna Hirsuta?

Mitragyna Hirsuta is a tropical tree in the Rubiaceae family, naturally occurring in parts of Southeast Asia, particularly in Thailand, Laos, and Vietnam. The species thrives in warm and humid environments and is known for its broad, hairy leaves and spherical flower clusters.

This article provides a fact-based overview of the plant’s scientific classification, morphology, natural distribution, and ecological characteristics – entirely without reference to uses or traditional applications. The article is specifically intended for those seeking factual and in-depth information about what Mitragyna hirsuta is.

Scientific Classification

• Scientific name: Mitragyna Hirsuta
• Family: Rubiaceae (Madder family)
• Genus: Mitragyna
• Described: First scientifically described by Haviland in 1897
• Order: Gentianales
• Class: Magnoliopsida

Distribution and Natural Habitats

Mitragyna Hirsuta occurs in Thailand (including Chiang Mai, Tak, Sukhothai), Vietnam, Laos, and Cambodia. It grows naturally in low-lying tropical forests, along forest edges, and in open, disturbed areas up to approximately 850 meters above sea level.

The tree thrives in secondary forests and establishes itself well in environments where other vegetation has been reduced, making it ecologically adaptable.

Morphology – How to Identify Mitragyna Hirsuta

Tree Height and Form

A deciduous tree that can reach up to 20 meters in height and have a trunk circumference of approximately 160 cm. The crown is often evenly distributed, and the tree has a stable growth form.

Leaf Shape and Size

• Shape: elliptical to obovate
• Size: 15–32.5 cm long, 10–23 cm wide
• Surface: distinctly pubescent (hairy)
• Venation: 8–16 pairs of secondary veins
• Leaf Margin: ciliate (finely hairy)

Flowers and Fruit

The flowers are light green to yellowish-green and are arranged in dense, spherical flower heads (2–2.5 cm in diameter). The fruits are small capsules, 4–7.5 mm long, often with winged seeds.

Stipules and Petioles

• Stipules: interpetiolar, distinctly grooved, 1–2.5 cm long
• Petioles: 1.5–6.5 cm long, often reddish and hairy
• Domatia: small hairy depressions in vein axils

Ecological Adaptation and Growth Conditions

Mitragyna Hirsuta is adapted to tropical climates with high rainfall, nutrient-rich soil, and good light availability. It is often a pioneer species in secondary forests, making it important for regeneration and ecological stability.

Status and Conservation

According to IUCN, Mitragyna Hirsuta is classified as Least Concern (LC), meaning it is not threatened. It often occurs in areas with human impact and demonstrates good ecological adaptability.

Summary

So, what is Mitragyna Hirsuta? It is a deciduous tropical tree with a wide geographical distribution in Southeast Asia. It is characterized by its large, hairy leaves and globose inflorescences, as well as its ability to grow in both primary and secondary forest environments.

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