Question: What species of moonlight cactus has the description "Jamaica, Cuba; Guatemala, Honduras, Nicaragua. Stems many-ribbed. Flowers 18 cm long, receptacle densely woolly. Three subspecies are recognized: ssp. grandiflorus ssp. donkelaarii - Mexico. Stems 1 cm thick, low-ribbed, spines short, appressed to stem. Flowers 18 cm long. ssp. hondurensis- Honduras? Stem ribs tubercled. Flowers 30–34 cm long"
answer: Selenicereus grandiflorus    (L.) Britton & Rose