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.
crustose
(adjective) (of lichens) having a thin crusty thallus that adheres closely to the surface on which it is growing; “crustose lichens”
Source: WordNet® 3.1
crustose (not comparable)
(lichenology) Of a lichen, growing tightly appressed to the substrate.
• (of a lichen): foliose, fruticose, squamose
• Scouters, scourest, scouters
Source: Wiktionary
16 April 2025
(adjective) marked by richness and fullness of flavor; “a rich ruby port”; “full-bodied wines”; “a robust claret”; “the robust flavor of fresh-brewed coffee”
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.