There are four varieties of commercially viable coffee: Arabica, Liberica, Excelsa, and Robusta. Growers predominantly plant the Arabica species. Although less popular, Robusta tastes slightly more bitter and contains more caffeine.
Echium, genus Echium
(noun) a genus of bristly herbs and shrubs of the family Boraginaceae
Source: WordNet® 3.1
From the genus name.
echium (plural echiums)
(botany) Any member of the genus Echium of flowering plants.
Source: Wiktionary
14 April 2025
(noun) maximum clarity or distinctness of an image rendered by an optical system; “in focus”; “out of focus”
There are four varieties of commercially viable coffee: Arabica, Liberica, Excelsa, and Robusta. Growers predominantly plant the Arabica species. Although less popular, Robusta tastes slightly more bitter and contains more caffeine.