Teagueia jostii is easily recognized. The large plants bear several arched inflorescences 20-30 cm long, each producing many successive flowers, often two or three open at once. The lateral sepals are connate for less than half their length, and are widely spread and slightly reflexed, but the small petals are strongly reflexed a short distance from their base. The flower color is yellow to tan with purple stripes on the sepals and a purple-flushed lip. The lip orifice is usually dark purple. The sheaths usually have bright purple warts. The leaves are smooth-surfaced.

     Teagueia jostii is one of the most common species of Teagueia on Cerro Mayordomo between 3100m and 3300 m. Another form of the species, larger and more robust and with a callus on each petal, is abundant on Cerro Añangu. I am tentatively lumping them because of their overall similarity, but future research may show these to be distinct species. If I can find populations of both of them growing together without intergrading, that would decide the issue.

    The Cerro Añangu form is so common in places that it forms a loose tangled mat, with hundreds of half meter long plants sprawlng over the ground in such numbers that it is impossible not to step on them. They grow intermixed with other Teagueia species but usually outnumber the others.