cypress pine, (genus Callitris), genus of 15 species of coniferous shrubs and trees in the cypress family (Cupressaceae). Cypress pines are native to Australasia and grow best in arid localities. The wood is often attractively marked and is resistant to termite attack. Tannin, sandarac resin, and fragrant oils can be extracted from the trees, and several species are grown as ornamentals.

Physical description

Cypress pines are evergreens with scalelike leaves that are characteristically borne in whorls of three; their tips are often thickened and curve inward. The male cones are small and are produced at the tips of the branches. The female cones are nearly round and feature six woody scales arranged in two whorls. Several species are fire-adapted and generally release their seeds following a wildfire.

Major species

The most important timber trees of the genus are the Murray River pine, or white cypress pine (Callitris columellaris), found throughout Australia; the black cypress pine (C. endlicheri) of eastern Australia, locally also called black pine, red pine, and scrub pine; the Port Macquarie pine, or stringybark (C. macleayana), of southeastern Australia; and the common cypress pine (C. preissii) of southern Australia, often shrubby near the seacoast, with one subspecies called slender pine and another known as turpentine pine. Most of these timber trees are about 25 metres (about 80 feet) tall, but the Port Macquarie pine, also planted as an ornamental, may reach 45 metres (148 feet). Timber from the Oyster Bay pine (C. rhomboidea), a coastal tree of eastern and southern Australia, usually 9 to 15 metres (29.5 to 49 feet) tall, is used for local construction. C. sulcata, endemic to New Caledonia, is listed as an endangered species by the IUCN Red List of Threatened Species.

Field of baobab trees, Madagascar. (bottle tree)
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Related species

The related sandplain cypresses (genus Actinostrobus) and the African cypresses (genus Widdringtonia) are sometimes also called cypress pines.

The Editors of Encyclopaedia Britannica This article was most recently revised and updated by Melissa Petruzzello.

conifer, any member of the division Pinophyta, class Pinopsida, order Pinales, made up of living and fossil gymnospermous plants that usually have needle-shaped evergreen leaves and seeds attached to the scales of a woody bracted cone. Among living gymnosperm divisions, the conifers show little similarity to the Cycadophyta and Gnetophyta but share several vegetative and reproductive traits with the Ginkgophyta. Conifers are most abundant in cool temperate and boreal regions, where they are important timber trees and ornamentals, but they are most diverse in warmer areas, including tropical mountains.

General features

Diversity of size and structure

The conifers are the most varied gymnosperms. The world’s oldest trees are the 5,000-year-old bristlecone pines (Pinus longaeva) of desert mountains in California and Nevada. The largest trees are the giant sequoias (Sequoiadendron giganteum) of the Sierra Nevada of California, reaching heights of more than 95 metres (312 feet) and weights of at least 2 million kilograms (4.4 million pounds; compared with 190,000 kilograms for the largest recorded blue whale). Wherever conifers grow, especially in temperate climates, one of these species is usually the tallest tree. In fact, the very tallest trees are the coast redwoods (Sequoia sempervirens) of coastal California, some of which are more than 110 metres (361 feet) tall.

The world’s smallest trees probably are also conifers: the natural bonsai cypresses (Cupressus goveniana) and lodgepole pines (Pinus contorta) of the pygmy forests (adjacent to the towering redwood forests) of the northern California coasts. On the sterile hardpan soils of those astounding forests, the trees may reach full maturity at under 0.2 metre (0.7 foot) in height, while individuals of the same species on richer, deeper soils can grow to more than 30 metres (98 feet). Other conifers, such as the pygmy pine (Lepidothamnus laxifolius) of New Zealand, the smallest conifer, are always shrubby and may mature as shorter plants (less than 8 centimetres [3.15 inches] in height) than the pygmy cypress, but with greater spread.