Overview

Distribution

Range Description

South and south-west Yunnan and north Thailand.
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SW Yunnan [Myanmar].
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Physical Description

Morphology

Description

Trees, 6-12 m tall. Branchlets terete, glabrous. Petiole 1.2-1.5 cm; leaf blade elliptic or oblong-elliptic, rarely elliptic-obovate, 7-18 × 4-8 cm, papery to thinly leathery, abaxially paler and conspicuously reticulate, lateral veins 10 or 11 pairs, base acute to attenuate, apex shortly acuminate. Panicles 10-15 cm, glabrous or puberulous. Floral tube 6-merous, 1.2-1.5 cm, smooth walled or with 12 shallow, broad ribs, densely yellow-brown puberulous; sepals narrowly deltate, 5.5-8 mm, ca. 1/2 as long as floral tube, adaxially glabrous; annulus absent; epicalyx segments absent or minute. Petals purple to bluish purple when dry, ovate, 2-2.5 cm including claw 5-7 mm. Stamens 75 to ca. 130, in 2 or 3 whorls, monomorphic. Ovary glabrous. Capsules oblong, 2.5-3.5 × ca. 2 cm, 6-valved. Seeds yellowish brown, ca. 10 mm including wing. Fl. May-Jun, fr. Oct-Dec.
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Diagnostic Description

Synonym

Lagerstroemia speciosa (Linnaeus) Persoon var. intermedia (Koehne) Furtado & Montien.
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Type Information

Isosyntype for Lagerstroemia intermedia Koehne in Engl.
Catalog Number: US 458695
Collection: Smithsonian Institution, National Museum of Natural History, Department of Botany
Verification Degree: Original publication and alleged type specimen examined
Preparation: Pressed specimen
Collector(s): A. Henry
Locality: Szemoa, Yunnan, China, Asia-Temperate
  • Isosyntype: Koehne, B. A. 1903. Pflanzenr. 17: 260.
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Ecology

Habitat

Habitat and Ecology

Habitat and Ecology
A species found at forest edges and along roadsides between 800 to 1,500 m.

Systems
  • Terrestrial
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Scrub forests, hillsides, roadsides; 800-1500 m.
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Conservation

Conservation Status

IUCN Red List Assessment


Red List Category
VU
Vulnerable

Red List Criteria
B1+2ce

Version
2.3

Year Assessed
1998
  • Needs updating

Assessor/s
Sun, W.

Reviewer/s

Contributor/s
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Population

Population
In Yunnan, subpopulations are scattered and very small.
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Threats

Major Threats
It appears to be naturally rare but loss of habitat and cutting for fuelwood has contributed significantly to the present scarcity.
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Wikipedia

Lagerstroemia intermedia

Lagerstroemia intermedia is a species of plant in the Lythraceae family. It is found in China and Thailand. It is threatened by habitat loss.

References[edit]


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Notes

Comments

This species is very similar to the widespread and commonly cultivated Lagerstroemia speciosa (Linnaeus) Persoon. The lectotype of L. intermedia differs in having slightly smaller, non-apiculate buds and smaller flowers that are very shallowly ribbed or smooth walled. In L. speciosa, the buds are typically apiculate and the floral tubes are more deeply and conspicuously ribbed, but it is uncertain if there is a continuum from shallow to deep ribbing. If there is a continuum, then L. intermedia is better considered a variety of L. speciosa. Epicalyx segments described by Koehne in the protologue of L. intermedia that might be a useful character are, in fact, not present on the lectotype.

Lagerstroemia intermedia is very local and of some conservation concern.

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