Periglossum angustifolium leaves

The sessile, opposite and erect to spreading leaves of Periglossum angustifolium are very narrow, linear to thread-like and long with rolled under margins. The leaf midribs are prominent below. The blades are hairless, except sometimes below, between the rolled under margins (Leistner, (Ed.), 2000; Pooley, 1998; iNaturalist; https://www.worldfloraonline.org).