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Lesser Sundas deciduous forests

Lesser Sundas deciduous forests

Lesser Sundas deciduous forests
The Lesser Sundas deciduous forests stretch across the Indonesian islands of Lombok, Sumbawa, Komodo, Flores, and Alor, in the eastern Lesser Sunda chain. These islands sit within Wallacea, the transitional zone straddling the Wallace Line, where Asian and Australian plants and animals mingle. Monsoon forests and savannas dominate, ranging from moist and dry deciduous woodland to dry thorn and dry evergreen forest, with characteristic trees such as tamarind (Tamarindus indica) and Schleichera oleosa, while open savanna woodlands carry lontar palm (Borassus flabellifer) and Indian jujube (Ziziphus mauritiana). This is the driest yet most strongly seasonal part of Indonesia, with annual rainfall of roughly 800 to 1,350 mm falling mainly in a December-to-March wet season. The region is famous as the home of the endemic Komodo dragon and a wealth of endemic birds, and Komodo National Park is protected as a World Heritage Site.
RESOLVE 163
Australasia
15,227 sq mi
Tropical & Subtropical Dry Broadleaf Forests
Landscape type
Tropical & Subtropical Dry Broadleaf Forests
Plant region
Australasia
Region footprint
15,227 sq mi
Habitat pressure
Nature Could Reach Half Protected (Dinerstein NNH 2)
Use this as the broad planting pattern for the region: Tropical forests that pass through a pronounced dry season, when many trees drop their leaves to conserve water. They hold high biodiversity but are among the most threatened tropical habitats, sensitive to fire and to clearing for agriculture. For garden decisions, pair that context with the plant list below, then narrow by your site's light, water, soil, and mature-size constraints.

Range & origins

Lesser Sundas deciduous forests location on world map
Marker placed inside the RESOLVE 2017 polygon at 8.7°S, 117.2°E.
Region through time
Modern footprint
RESOLVE 2017 maps 15,227 sq mi
This boundary is a modern ecological footprint for Lesser Sundas deciduous forests, not a permanent line on the planet. It is useful for today's plant and wildlife context because it follows recurring vegetation, climate, landform, and disturbance patterns.
Why here
tropical & subtropical dry broadleaf forests conditions
The region sits in the Australasia realm and is classed as tropical & subtropical dry broadleaf forests. Elevation, moisture, fire, soils, coasts, and human land use can all make the real landscape more varied than a single map color suggests.
Change pressure
Nature Could Reach Half Protected
Plotwright shows this as the current RESOLVE footprint. Over decades to centuries, warming, disturbance, invasive species, land use, and restoration can move the living edge of a region even when the reference map stays fixed.

Similar planting regions

Browse other regions with a similar hot, dry-summer rhythm. Their plant lists can suggest species and combinations worth comparing.
RESOLVE 164 - Australasia
New Caledonia dry forests
The New Caledonia dry forests cover the western side of Grand Terre, the main island of New Caledonia, a French territory in the South Pacific Ocean. They grow in the rain shadow of the island's central mountain range, where the drier climate favors dense, vine-laced sclerophyll (dry) forest with trees generally 5 to 15 meters tall and characteristic genera such as Acacia, Gardenia, Pittosporum, Dodonaea, and Premna. The flora is highly endemic, including the flagship tree Ixora margaretae, a small species festooned with large fuchsia blossoms along its trunk. The ecoregion is considered critically endangered: fire, clearing for agriculture and cattle, and invasive species have reduced the original forest to scattered patches covering only a small fraction of the land area, though a substantial share now lies within protected areas. For gardeners, this is a source region for ornamental tropical genera like Ixora, Gardenia, and Pittosporum that are widely grown elsewhere.
Tropical & Subtropical Dry Broadleaf Forests
Zones 12b-13b
+2.8°F by 2070
1,706 sq mi
NNH tier 1
RESOLVE 165 - Australasia
Sumba deciduous forests
The Sumba deciduous forests cover the single Indonesian island of Sumba, in the Lesser Sunda Islands of East Nusa Tenggara province, within the biologically distinctive Wallacea region where Asian and Australasian faunas mix. Deciduous monsoon forest covers most of the island, while moister south-facing slopes that stay green through the dry season hold lowland evergreen rainforest; sandalwood (Santalum) was historically a common element of these woods. The climate is tropical and seasonally dry, with a pronounced dry season from roughly May to November and a rainy season from December to April. Despite the island's small size and modest vertebrate diversity, it supports a notably high level of bird endemism, with the Sumba hornbill serving as the ecoregion's flagship species. Much of the original forest has been cleared for crops and grazing, and repeated fires and grazing now maintain fire-resistant Casuarina and eucalypt savannas across the island. Two national parks, Laiwangi Wanggameti and Manupeu Tanah Daru, were designated in 1998 to protect endangered wildlife.
Tropical & Subtropical Dry Broadleaf Forests
Zones 13b
+3.0°F by 2070
4,155 sq mi
NNH tier 3
RESOLVE 166 - Australasia
Timor and Wetar deciduous forests
The Timor and Wetar deciduous forests cover the islands of Timor and Wetar, along with Rote, Savu, and adjacent smaller islands in the Lesser Sunda chain, spanning Indonesia and East Timor. The islands sit within Wallacea, never connected to either the Asian or Australian mainland, so they hold a distinctive blend of species from both realms. The lower country supports dry deciduous, dry evergreen, and thorn forests, with lowland monsoon forest featuring Pterocarpus indicus and open savannas of Eucalyptus alba and the palm Borassus flabellifer; natural stands of Eucalyptus urophylla and sandalwood (Santalum album) also occur. The climate is a tropical monsoon one that lies in Australia's rain shadow, making this among the driest parts of Indonesia with a long, pronounced dry season. The ecoregion has the greatest number of bird species (229) of any tropical dry forest ecoregion in the Indo-Pacific, with many endemics, though its prized sandalwood has been left scarce by generations of overharvesting. Gardeners may recognize several native genera grown ornamentally elsewhere, including eucalypts and fragrant sandalwood.
Tropical & Subtropical Dry Broadleaf Forests
Zones 13a-13b
+2.9°F by 2070
12,941 sq mi
NNH tier 3
RESOLVE 520 - Neotropic
Apure-Villavicencio dry forests
The Apure-Villavicencio dry forests stretch along the eastern foot of the Andes' eastern cordillera, spanning the Venezuelan states of Portuguesa, Barinas and Apure and the Colombian departments of Arauca, Casanare and Meta. This is a transitional ecoregion, a patchwork of premontane, gallery and deciduous dry forest grading into savanna where the Andean montane forests give way to the lowland Llanos grasslands. Characteristic woody plants include mesquite (Prosopis juliflora), palo verde (Cercidium praecox), kapok (Ceiba pentandra), yellow mombin (Spondias mombin), and palms such as the moriche (Mauritia flexuosa) and macaúba (Acrocomia aculeata). Its climate is equatorial with a pronounced dry winter (Köppen Aw), with temperatures ranging from about 19 to 33 degrees Celsius. The forests have been severely degraded by deforestation, farming and ranching, leaving poorly protected remnants that the World Wildlife Fund rates as Vulnerable, yet they still shelter the giant anteater, Geoffroy's spider monkey, and the flagship Colombian four-eyed frog. Gardeners may recognize several natives here as ornamentals, including the stately kapok tree and the moriche and macaúba palms.
Tropical & Subtropical Dry Broadleaf Forests
Zones 12a-13b
+3.6°F by 2070
26,469 sq mi
NNH tier 3
RESOLVE 521 - Neotropic
Bajío dry forests
The Bajío dry forests cover the southwestern Mexican Plateau in west-central Mexico, spanning the states of Jalisco, Guanajuato, and Michoacán across the Lerma River basin and the lake country around Chapala, Cuitzeo, and Pátzcuaro. Set in valleys between roughly 1,000 and 2,000 meters on shallow, rocky, well-drained volcanic and limestone soils, the region was historically dry deciduous forest whose characteristic trees included copal, pochote, palo amarillo, and mauto, with thorn-scrub communities of mesquite and huamúchil. The climate is tropical subhumid, with annual rainfall around 500 to 930 millimeters and a pronounced dry season that can last up to eight months. This is one of Mexico's most developed and densely populated landscapes, and centuries of agriculture and grazing have reduced the forest to small pockets now dominated by thorn scrub and subtropical matorral, leaving the ecoregion classed as critical or endangered with only about 7.5 percent in protected areas. Gardeners working in comparably dry, seasonal climates may recognize natives of this region in drought-adapted, deciduous trees such as mesquite and copal.
Tropical & Subtropical Dry Broadleaf Forests
Zones 11a-11b
+2.8°F by 2070
14,472 sq mi
NNH tier 4
RESOLVE 522 - Neotropic
Balsas dry forests
The Balsas dry forests occupy the basin of the Balsas River in western and central Mexico, spreading across the states of Michoacan, Guerrero, Morelos, Mexico, Puebla, and Oaxaca. This tropical dry broadleaf ecoregion is a deciduous and thorn forest dominated by Bursera trees, alongside the legume Haematoxylum brasiletto and abundant columnar cacti such as Pachycereus and Cephalocereus. The climate is tropical and subhumid, with seasonal rainfall and a severe dry season that can last up to eight months. The forests are a renowned center of plant endemism and speciation, especially for Bursera, with roughly half of the region's Bursera species found nowhere else, and they shelter the near-endemic Balsas screech-owl, though only about a tenth of the ecoregion lies within protected areas. For drought-tolerant or xeric plantings, the native Bursera (the source of copal incense) and the dyewood Haematoxylum brasiletto are ornamental genera that evolved here.
Tropical & Subtropical Dry Broadleaf Forests
Zones 10b-13b
+3.1°F by 2070
24,105 sq mi
NNH tier 4

Sources & citations

Cite this page
For lesson plans, articles, or regional planting notes that use this Plotwright page. To cite the underlying ecoregion framework or a specific editorial profile, use the source cards below.
Plotwright. (n.d.). Lesser Sundas deciduous forests (Lesser Sundas deciduous forests). Retrieved 2026, June 14, from https://plotwright.garden/regions/resolve-163
Sources for this region
This page cites Plotwright first for the compiled view, then lists the upstream framework, climate, and editorial source pages so readers can cite the original material directly.
RESOLVE 2017 Terrestrial Ecoregions (Dinerstein et al.)
Primary ecoregion framework
Backs 4 fields
RESOLVE id
Biome + realm
Area
NNH tier
One Earth
One Earth
Backs 1 field
Editorial summary
Wikipedia
Wikimedia Foundation
Backs 1 field
Summary cross-check