Maxillaria obtusa, synonym Trigonidium obtusum, is an orchid native to tropical South America.

The flower is approximately 1 cm (0.39 in) wide with sepals that are broader and taper less than other species.

During the hottest hours of the day, the flowers release a sweet fragrance similar to lemon.

[5] Male Plebeia droryana bees pollinate the flowers by performing pseudocopulation.

Bees become trapped in the tubular orchid after being attracted by the sepals or petals of the flower.