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Key to Hamelia
Rubiaceae
Hamelia
https://fsus.ncbg.unc.edu/main.php?pg=show-key.php&keyid=40764
Leaves glabrous above, sparsely pubescent on the main veins below; floral tube and corolla glabrous; leaves usually in whorls of 4; corolla yellow to yellow-orange
⇒ Hamelia patens var. glabra
(c) Bradley, Keith
Leaves sparsely to densely villous, especially on the undersurface; floral tube and corolla sparsely to densely villous; leaves usually in whorls of 3; corolla orange-red to red
⇒ Hamelia patens var. patens
(c) Uribe, Nicolás Baresch - CC-BY