罗汉松科又名竹柏科，裸子植物，主要生长在热带、亚热带和南半球的温带地区，共有18-19属，约170-200余种，中国有2属14种，都生长在长江以南各地。

罗汉松科植物都是常绿乔木或灌木，叶互生或有时对生，针状、鳞片状或线形；花单性异株或同株，雄花顶生或腋生，雌花腋生或生于枝顶，有苞片；种子当年成熟，核果状、坚果状或鲜有浆果状。

寄生陆均松（Parasitaxus usta）是已知的裸子植物中唯一一种寄生植物，生长在新喀里多尼亚，寄生在新喀里多尼亚陆均松（Falcatifolium taxoides）上。

The Podocarpaceae are a large family of mainly Southern Hemisphere conifers, comprising about 156 species of evergreen trees and shrubs. It contains 19 genera if Phyllocladus is included and if Manoao and Sundacarpus are recognized.

The family is a classic member of the Antarctic flora, with its main centres of diversity in Australasia, particularly New Caledonia, Tasmania, and New Zealand, and to a slightly lesser extent Malesia and South America (primarily in the Andes mountains). Several genera extend north of the equator into Indochina and the Philippines. Podocarpus reaches as far north as southern Japan and southern China in Asia, and Mexico in the Americas, and Nageia into southern China and southern India. Two genera also occur in sub-Saharan Africa, the widespread Podocarpus and the endemic Afrocarpus.