葛量洪茶，原名大苞山茶，杜鹃花目山茶科山茶属小型常绿乔木植物，属于香港濒危植物。首次于1955年被任职农林部的刘松彬在香港大帽山发现，并以当时港督葛量洪的名字命名。现在受到香港《林务规例》所保护，并且已加载《中国植物红皮书》和《广东省珍稀濒危植物图谱》。

葛量洪茶一般高8米。叶革质，椭圆形，端尖底圆，无毛，边有细锯齿；叶柄长8-12毫米。花又大又白而无柄；苞片及萼片圆型；花瓣8片，基部连生；雄蕊无轮；子房有毛，花柱长2厘米。蒴果球形，有3到4个室。花期从每年3月到4月。主要分布在香港的大帽山、马鞍山，还有广东等地方。

Camellia granthamiana (Chinese: 葛量洪茶), or Grantham's camellia, is a rare, endangered species of Camellia, which was first discovered in Hong Kong in 1955.

The distribution of the species is limited in both Hong Kong and Mainland China. Only one individual of the species was found at that time when it was discovered. A few more wild populations were found in Ma On Shan and also in Guangdong (including Shenzhen ).