Nervillia jacksoniae, a small terrestrial herbaceous orchid in the subfamily Epidendroideae (family Orchidaceae), grows from an underground tuber 1 to 1.5 cm (0.4 to 0.6 in) in diameter. The erect inflorescence produces a single, terminal, small (less than 1 cm [0.4 in]) flower when 4 to 7 cm (1.6...