Yellow flowers, smell of leavened bread (Orchidspecies.com)
Published in Syst. Nat., ed. 13 2: 1: 65 in 1791.
Synonym is Epidendrum umbellatum Sw.
Native to South America and the Caribbean.
From Bot. Reg. (E. umbellatum)
A native of the West Indies, where it grows on the trunks of trees, sometimes horizontally, sometimes perpendicularly downwards. Introduced in 1793 by Rear-admiral William Bligh, in the Providence.