The spelling of the word "epidendron" can be explained using the International Phonetic Alphabet (IPA). The first syllable "epi" is pronounced as /ˈɛpi/, with a short E sound, followed by a P and a long E sound. The second syllable "den" is pronounced as /dɛn/, with a short E sound and a silent D. The final syllable "ron" is pronounced as /rɑn/, with a long A sound and an N. When combined, these three syllables create the word "epidendron," pronounced as /ˌɛpiˈdɛndrɑn/.