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.
Rudbeckia, genus Rudbeckia
(noun) North American perennial herbs with showy cone-shaped flower heads
Source: WordNet® 3.1
From the genus name.
rudbeckia (plural rudbeckias)
Any member of the genus Rudbeckia of coneflowers.
Source: Wiktionary
Rud*beck"i*a, n. [NL. So named after Olaf Rudebeck, a Swedish botanist.] (Bot.)
Definition: A genus of composite plants, the coneflowers, consisting of perennial herbs with showy pedunculate heads, having a hemispherical involucre, sterile ray flowers, and a conical chaffy receptacle. There are about thirty species, exclusively North American. Rudbeckia hirta, the black-eyed Susan, is a common weed in meadows.
Source: Webster’s Unabridged Dictionary 1913 Edition
28 April 2024
(adjective) of or relating to an inheritable character that is controlled by several genes at once; of or related to or determined by polygenes
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.