Type : "44.
M. bracteatum, sp. n., [...] Hab. New Granada, near the west coast, Barclay." [protologue].
Panamá, Veraguas, Bahía Honda (près de Pueblo Nuevo), marais salants, sol argileux, 06/03/1839, fleurs fânées et fruits. Buisson de 2,5-3 m. G.W. Barclay 2825 (HT:
K000530211 [ex hb. Hook.; "Holotype" scrips. V.E. Rudd, 10/1971; cité comme holotype par V.E. Rudd, Bol. Soc. Bot. México, 37:
138. 1977]; IT: BM000629624 [sur
Global plants],
K000530212 [ex hb. Hook.; "Isotype" scrips. V.E. Rudd, 10/1971],
US00002467).