天竺葵属（学名：Pelargonium），别名石腊红、入腊红、日烂红、洋葵，属牻牛儿苗科，是开花植物的一个属，包括约230种多年生肉质、亚灌木或灌木植物。天竺葵原产非洲南部，世界各地普遍栽培。

天竺葵幼株为肉质草本，老株半木质化；其叶对生，叶片为圆形，肾形或扇形；花色有白、红、紫、粉红、橙等多种，为伞形花序，四季都能开花，以春季最盛。天竺葵是一种带有香味、长年生的多毛植物，带有锯齿状的叶子与花，在西方是很好的装饰窗台的花卉，在欧洲大陆，如德奥等国，尤为常见。

天竺葵的叶子通常是互生的, 掌状浅裂或羽状签裂, 一般具有长叶柄，有的种类叶上有深浅纹路，每朵花具五瓣，花聚集成伞状，称为“假伞状花序”，花的形状从星状到漏斗状有各种形状，颜色有白色、粉红色、红色、橘红色、紫色直到甚至近似黑色，各种都有。

Pelargonium /ˌpɛlɑːrˈɡoʊniəm/ is a genus of flowering plants which includes about 200 species of perennials, succulents, and shrubs, commonly known as geraniums (in the United States also storksbills). Confusingly, Geranium is the botanical name (and also common name) of a separate genus of related plants often called cranesbills. Both genera belong to the family Geraniaceae. Linnaeus originally included all the species in one genus, Geranium, and they were later separated into two genera by Charles L’Héritier in 1789.