Phymatidium tillandsioides is more correctly named Phymatidium falcifolium since that name has precedence (P.falcifolium 1881 and P. tillandsioides 1883), but the name Phymatidium tillandsioides is so descriptive of its appearance that it is more frequently known by it.
This is a mini-epiphyte from Brazil, found growing on trees and shrubs in bright shade, near rivers and waterfalls. Leaves are thin, light green, and grass-like, arranged spirally in a tuft and resembling a tiny Tillandsia, each leaf is about 20mm long. Flowers are produced on spikes which are usually 70 to 80mm long with each carrying 8 to 12 small white and green flowers which are held well above the foliage and which are pleasantly fragrant.
I have two plants of Phymatidium tillandsioides, one growing on a cork mount and one growing in a small pot, both are given intermediate to warm/hot conditions with humidity kept at 80% or more together with good air movement. They are generally kept moist, watered when almost dry, and fertilized with weak feed at every other watering, they are also occasionally misted. Light levels for this plant should be quite low with no direct sunlight. They do not require a resting period.