Angraecum sesquipedale

Aeranthes sesquipedalis [Thou] Lindley 1824
Angorchis sesquipedale [Thou ]O.Ktze. 1891
Angraecum bosseri  Senghas 1973
Angraecum sesquipedale var. angustifolium Bosser & Morat 1972
Macroplectrum sesquipedale [Thou] Rolfe
Macroplectrum sesquipedale [Thou.] Pfitz. 1889
Mystacidium sesquipedale Rolfe 1904

sesquipedale = one and half foot, 45cm, refers to the length of the spur

grow epiphytically at altitudes of 100 meters or less on sloping tree trunks and crotches of trees near the seashore in areas where it is consistantly hot and steady abundant rainfall all year round

strong scented, more intense with full moon at night
This species was made famous by Charles Darwin's prediction that there would be a pollinator out there that could reach to the bottom of the extremely long spur in the back of the flower. His prediction came true with the discovery of a long-tongued hawk moth, Xanthopan morganii praedicta about 100 years later.