Bermuda subtropical conifer forests

The Sierra Madre Occidental pine-oak forests stretch from the "sky islands" of southeastern Arizona south through eight Mexican states to north of Guadalajara, covering rugged mountains and steep canyons. Fire-dependent pine-oak forests dominate elevations between roughly 1,500 and 3,300 meters, holding exceptional tree diversity with an estimated 23 pine species and over 100 oak species. The climate brings mild winters and wet summers, with mean annual precipitation around 553 mm concentrated in summer and temperatures ranging from about -3 to 28°C. As the core of the Madrean pine-oak woodlands biodiversity hotspot, the region holds roughly two-thirds of Mexico's remaining forest and woodland and is home to the thick-billed parrot.

The Sierra Madre Oriental pine-oak forests run along rugged mountain ranges from isolated highlands in southwestern Texas (Davis and Chisos Mountains) and southern New Mexico south through northeastern Mexico to near Mexico City. Pine-oak forest dominates between roughly 1,000 and 3,500 m elevation, with pines including Mexican pinyon, Arizona pine, and the locally endemic Nelson's pinyon and Gregg's pine, alongside oaks such as Quercus castanea and Q. affinis. Climate ranges from dry in the north (about 200-300 mm annual rainfall near Big Bend) to far wetter in the south (900-1,500 mm), spanning humid to subhumid slopes. The region is part of the Madrean Pine-Oak Woodlands Biodiversity Hotspot and an Endemic Bird Area; only about a quarter is protected, with logging, grazing, and road-building among ongoing threats.

The Bahamian pineyards are a tropical and subtropical coniferous forest ecoregion spanning the northern Bahamas, on Grand Bahama, Abaco, Andros, and New Providence, together with the Caicos Islands of the Turks and Caicos. The canopy is dominated by the Bahamian pine (Pinus caribaea var. bahamensis), a variety botanically distinct from other Caribbean pines and adapted to sandy, salty ground, growing over a broad-leaved shrub understory that includes poisonwood (Metopium toxiferum), thatch palms, and the endemic five-finger. These are fire-maintained, pyrogenic forests; pollen records indicate a largely anthropogenic origin, with the modern pineyards established by about 1200 CE following Lucayan land clearing. The ecoregion carries a Critical/Endangered status and shelters notable wildlife, including endemic birds such as the Bahama yellowthroat, Bahama woodstar, and Bahama oriole, rock iguanas (Cyclura) and boas (Epicrates), and the wintering Kirtland's warbler, while logging, invasive species, and intensifying hurricanes such as Dorian remain serious threats. For gardeners, the understory native pinepink orchid (Bletia purpurea) is among the ornamental plants found here.

The Central American pine-oak forests stretch along the mountainous spine of northern Central America, from the Chiapas highlands and Sierra Madre de Chiapas in southern Mexico through the uplands of Guatemala, El Salvador, and Honduras into Nicaragua. As the name suggests, these montane woodlands are dominated by pines (Pinus species) and oaks (Quercus species), with pines tending to prevail at higher elevations and oaks lower down, alongside trees such as American sweetgum. They occupy a mid-elevation band roughly between 600 and 1,800 meters, giving way to cloud forest higher up and grading into tropical moist forest on the Caribbean slope and tropical dry forest on the Pacific slope. The region is an Endemic Bird Area and the celebrated home of the resplendent quetzal, though much of its forest is now considered critically threatened, with the stands in El Salvador almost entirely cleared. For gardeners, it is the native ground of American sweetgum (Liquidambar styraciflua), a popular ornamental shade tree prized for its fall color.

The Cuban pine forests form a tropical coniferous ecoregion confined to the island of Cuba and Isla de la Juventud, surviving in separate western patches around Pinar del Rio and eastern stands in the Sierra Maestra and Nipe-Sagua-Baracoa mountains. The canopy is built almost entirely of native pines, with Pinus caribaea and Pinus tropicalis dominating the western forests and Pinus maestrensis and Pinus cubensis in the east, often accompanied by the local oak Quercus sagraeana. These trees grow on well-drained, nutrient-poor, acidic soils, including quartziferous sands and lateritic ground, under a warm climate averaging about 25 degrees Celsius with a dry season from roughly November to April and a wet summer. The region is a stronghold of endemism, home to flagship birds such as the Cuban tody, Cuban trogon, and olive-capped warbler, while the Cajalbana Plateau ranks among Cuba's most distinctive centers of plant diversity; centuries of logging, fire, and mining have left the ecoregion classified as critically endangered.

The Himalayan subtropical pine forests form a long, narrow band stretching for over 3,000 km along the lower elevations of the Himalaya, spanning Pakistan, India, Nepal, and Bhutan and crossing Indian states including Himachal Pradesh, Uttarakhand, and Sikkim. The forest is dominated by a single conifer, the Chir pine (Pinus roxburghii), which forms open stands over a sparse understory of shrubs such as barberry, blackberry, and Himalayan raspberry. Its climate is shaped by the southwestern monsoon arriving off the Bay of Bengal roughly from May through September, with a pronounced gradient in which the eastern Himalaya are wetter and the west noticeably drier. Though less species-rich than tropical rainforest, the ecoregion is important habitat, home to wildlife such as the Himalayan goral, yet more than half of its natural habitat has been cleared or degraded by overgrazing, fuelwood and fodder collection, and shifting cultivation.