Stenomesson chloranthum

It is a perennial herb with a round bulb that is 2.5-4 centimeters in diameter. It has 2-3 dull, olive green leaves that are 25-29 by 2-2.5 centimeters with blunt tips. Its inflorescences are on a stem-like stalk that is 30-40 centimeters long. The flowering stalk is 7-8 millimeters in diameter at its base tapering to 5 millimeters at its apex. The flowering stalk is circular and solid in cross section. Its flowers occur in clusters of 5-10 at the top of the stalk. The cluster of flowers is subtended by 2 pale green bracts that are 2.5-3 by 1-1.5 centimeters and come to a point at their tips. The pale green, bell-shaped flowers are 5.8-6.7 centimeters long. The base of the flower is a 3.5-4 centimeter tube that is 2.5-3.1 millimeters wide at the bottom and opens near the top to 8.3-9 millimeters. Atop the floral tube are 6 tepals arranged in two rows. The elliptical outer tepals are 17.7-18.5 by 8-8.5 millimeters and come to a point at their tip. The elliptical inner tepals are 16.8-18.3 by 8.3-8.9 millimeters and have blunt tips. Its flowers have 6 stamens with filaments that are 8.3-8.7 by 2.7-3 millimeters and anthers that are 3 millimeters long. Its flowers have a single thread-like style that is 6 centimeters long and topped by a 3-lobed stigma. Its flowers have an ellipsoid ovary that is 7.5-8 by 4.3-5 millimeters with 3 chambers. Each of the ovary chambers has numerous ovules. Its fruit are conical with numerous black flat seeds that have wings.[2]

Its low elevation habitat, 900 m (3,000 ft), is notable among Peruvian Stenomesson species.[2]

The pollen is shed as permanent tetrads.[2]