Herba usque ad 1 m alta; caulis singulus, erectus, ramosus; folia basalia linearia, 10 cm usque longa, 5-7 nervia, albo-marginata; folia caulina media 10 cm usque longa, superiora gradatim breviora, septemnervia; umbella numerosa; involucrum e bracteis 2-3 linearibus trinervis; radii 4-7, filifolmes, 5-15 mm lon¬gi; involucellum e bracteolis 5 linearibus; flores subsessiles; stylopodium fuscum; styli breves, divaricati; fructus oblongus, costis prominentibus; sulcis univittatis.
Perennial, c. 1 m tall, erect. Stem 1. Basal leaves numerous, linear, white margined, veins 5-7, bases narrow, apices acute; cauline leaves 1-10 cm long, linear, veins 5-7, slightly amplexicaul, apices acute. Involucral bracts 2-3, linear, up to 3 mm long, veins 3. Rays 4-7, slender, 5-15 mm long. Involucel of 5 linear bractlets, 1-1.5 mm long, shorter than the flowering umbellet, apex acute, divari¬cate. Fruit oblong, 2.5 mm long; ridges prominent; furrows 1-vittate.
