- Dendrobium eboracense
- Dendrobium ejirii
- Dendrobium elatum
- Dendrobium elephantinum
- Dendrobium ellipsophyllum – Oval-leaved Dendrobium
- Dendrobium elmeri
- Dendrobium emarginatum
- Dendrobium endertii
- Dendrobium engae – Enga Dendrobium
- Dendrobium ephemerum – "small white orchid"
- Dendrobium epidendropsis – Epidendrum-like Dendrobium / synonym of Dendrobium ionopus
- Dendrobium equitans – Riding-leaved Dendrobium
- Dendrobium erectifolium
- Dendrobium erectopatens
- Dendrobium erectum
- Dendrobium eriiflorum – Eria-flowered Dendrobium
- Dendrobium eriopexis
- Dendrobium erostelle
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- Dendrobium erosum
- Dendrobium erubescens
- Dendrobium erythropogon
- Dendrobium escritorii
- Dendrobium eserre
- Dendrobium esuriens
- Dendrobium euryanthum
- Dendrobium evaginatum
- Dendrobium exaltatum
- Dendrobium exasperatum
- Dendrobium excavatum
- Dendrobium excavatum var. buruense
- Dendrobium excavatum var. excavatum
- Dendrobium exile
- Dendrobium exilicaule
- Dendrobium eximium – Extraordinary Dendrobium
- Dendrobium extra-axillare
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