Aeranthes albidiflora Toill.-Gen., Ursch & Bosser 1960
Photo by Olaf Pronk and Laurette E.U.R.L. orchids of Madagascar
To 
LATER
Common Name The White Flowered Aeranthes
Flower Size 1" [2.5 cm]
Found in eastern Madagascar in shady, mossy evergreen forests near sea level to 1400 meters as a small sized, hot to warm growing epiphyte with no stem and 6 to 7, two-ranked, unequally bilobed apically leaves that blooms in the later spring through fall on a pendant, 12" [30 cm] long, unbranched, single flowered inflorescence with 7 to 10 bracts.
CAUTION!!! The few references that I have do not agree with my photo determination above so please use with caution.
Synonyms
References W3 Tropicos, Kew Monocot list , IPNI ; AOS Bulletin Vol 36 #3 1967 photo fide; An Introduction to the Cultivated Angraecoid Orchids of Madagascar Hillerman & Holst 1986; Angraecoid Orchids Stewart, Hermans, Campbell 2006; Orchids of Madagascar Hermans 2007; Field Guide to the Orchids of Madagascar Cribb & Herman 2009; Les Orchidees de Madagascar Bosser & Lecoufle 2015 photo not;
--------------------------------------------------------------------------------------------------------------------------