A genus of conifer tree in wich the leaves are crowded on the twig, often approximately in two row; they are needle-like and single, leaving a round, flat scar when they fall, thus producing a small twig.
The female cones are borne erect; they shatter at maturity, but the woody axis persists.
Many fine ornamental species are now widely cultivated for their lofty, deeply pyramidal, monopodial crowns.
To grown, the species require a most climate and are sensitive to atmospheric pollution.
There is about 40-50 species, widespread throughout the northern hemisphere, especially on mountian/alpine habitats.