Rumex hymenosepalus Torr.

Plants perennial, glabrous or indistinctly papillose-pubescent, with distinctly tuberous roots and short rhizomes. Stems usually erect, rarely ascending, branched above middle, 25-90(-100) cm. Leaves: ocrea prominent and persistent at maturity, whitish or silvery white, membranous; blade oblong, oblong-elliptic, or obovate-lanceolate, (5-)8-30 × 2-8(-12) cm, base cuneate or narrowly cuneate, margins entire, flat or indistinctly crisped, apex acute or acuminate, rarely obtuse. Inflorescences terminal, occupying distal 1/ 2 of stem, narrowly paniculate, rarely simple. Pedicels articulated near middle or in proximal 1/ 3, filiform, 5-15(-20) mm, articulation indistinct. Flowers 5-20 in whorls; inner tepals oblong-cordate or orbiculate-cordate, 11-16 × 9.5-14 mm, base sinuate or emarginate, margins entire, rarely with few extremely small denticles at base, apex obtuse or subacute; tubercles absent. Achenes brown or reddish brown, 4-5(-7) × 2.5-4.5(-5) mm. 2n = 40.

It grows near streambeds but also on well drained higher ground. It grows in dry soil. It grows between 60-1,800 m above sea level. It can grow in arid places. It suits hardiness zones 6-10.

The leaves are cooked and eaten. They are cooked in several changes of water. They can also be dried and stored. The leaf stalks are eaten in pies like rhubarb. The seeds are sometimes cooked and eaten.

Can be grown by seedlings.