Paphiopedilum dayanum is named after a Victorian orchid grower and orchid painter, John Day. It was discovered by Sir Hugh Low in 1856, and Day flowered it in 1860 (Cribb 1998). The species has very small geographic distribution, and it has been only found on the lower slopes of Mount Kinabalu in Sabah, Borneo at the elevations of 300-1450m (Cribb 1998).
The green/yellow tesselated leaves are beautiful, and the flower is pretty big (about 12 cm across). I also think that the pattern on the backside of the lip/pouch is beautiful.
I got this plant from Ooi Leng Sun. I'm growing it in an intermediate condition; daily maximum and minimum temperature of 29/18C (85/65F) most of the year. The light intensity (photosynthetic photon flux density, PPFD) is 220 µmol/m2/s (about 1500 footcandles) for 13 hours. This is probably unnecessarily higher than what it needs.
It is interesting that there are small horns at the bottom right and left of the staminode. The illustration in Cribb (1998) doesn't show these horns.
Literature Cited:
- Cribb, P. 1998. The Genus Paphiopedilum, 2nd edition. p.349-353. Natural History Publications (Borneo).
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