For contemporary Chinese, the word "茶" (pinyin: chá) has come to commonly denote the drink that is derived from Camellia sinensis, the tea plant (茶樹/茶树, pinyin: cháshù). Prior to the 8th century BC, the tea was known collectively under the term "荼" (pinyin: tú) along with a great number of other bitter plants. The great similarity of the two characters are notable with the exception of an additional horizontal stroke in 荼. The character is made up of the "艸" (pinyin: cǎo) radical in its reduced form of "艹" and the word "余" which gives the phonetic cue. The plant was later more distinctly identified and was called "檟苦荼" (pinyin: jiǎkǔtú, literally "'evergreen shrub' of bitter 'bitter plant'"), or in simplified forms "苦荼" (pinyin: kǔtú) or "荈" (pinyin: chuǎn).