大沙叶属（学名：Pavetta），又名茜木属，是茜草科下的一个属，为灌木植物，很少为乔木。该属共有约350种，分布于东半球热带地区。

Pavetta is a genus of flowering plants in the Rubiaceae family. It comprises about 350 species of trees, evergreen shrubs and sub-shrubs. It is found in woodlands, grasslands and thickets in sub-tropical and tropical Africa and Asia. The plants are cultivated for their simple but variable leaves, usually opposite but also occur in triple whorls. The leaves are often membranous with dark bacterial nodules. Pavetta has small, white, tubular flowers, sometimes salviform or funnel-shaped with 4 spreading petal lobes. The flowers are carried on terminal corymbs or cymes.