Arachnothryx calycosa
Arachnothryx calycosa is a plant species in the Rubiaceae family. It was originally classified as Rondeletia calycosa by John Donnell Smith in 1913. In 1982, Attila Borhidi reclassified it under the genus Arachnothryx, as part of a broader reorganization within the Rubiaceae family.
Description
Arachnothryx calycosa is a woody evergreen shrub, typically growing between in height. It generally has opposite, sessile leaves that are ovate to oblong in shape. The upper surface of the leaves is dark green and hairless, while the underside may be lighter in color with a pubescent texture. The flowers are tubular with lobes, often in shades of pink, and are arranged in rounded clusters known as cymose inflorescences. Some species in this genus are fragrant, particularly in the evening. The fruits are small, dry, and indehiscent, containing numerous seeds.
Distribution
Arachnothryx calycosa is native to Costa Rica, where it typically grows in forested areas. The species is found at an elevation of approximately.