Name: Dendrobium ypsilon Seidenf.
Synonym: Eurycaulis ypsilon.
Etymology: The genus name Dendrobium derives from the Greek dendron (“tree”) and bios (“life”), and refers to its epiphytic lifestyle. ypsilon refers to the Greek letter Y and alludes to the characteristic shape of the lip.
First description: Gunnar Seidenfaden described the species in 1985.
Origin / Habitat: Thailand to the Malay Peninsula. It grows epiphytically in humid tropical forests; warm growing sites have been documented in Thailand.
Description & Notes: A miniature orchid with upright, flat, thin, highly branched stems and a few oval leaves at the stem tips. The short, curved to pendant inflorescences bear 1–5 flowers about 2 cm across. In our collection, it grows in bright to partial shade, with good air movement and regular moisture during growth. We cultivate it in warm to hot conditions, at about 20–30 °C, and keep it somewhat drier during its rest period.