Rumex hastatulus Baldwin

Plants annual or short-lived perennial, glabrous, with vertical rootstock. Stems solitary or several from base, erect or ascending, branched in distal 2/ 3 (in inflorescence), 10-40(-45) cm. Leaves: blade obovate-oblong, ovate-lanceolate, oblong-lanceolate, or lanceolate; 2-6(-10) × 0.5-2 cm, base hastate (with spreading lobes), auriculate, or occasionally without evident lobes, margins entire, flat, apex obtuse or subacute. Inflorescences terminal, occupying distal 3 of stem, usually lax and interrupted, narrowly paniculate. Pedicels articulated in proximal part, filiform, 1.5-2.5(-3) mm, articulation indistinct or slightly swollen. Flowers 3-6(-8) in whorls; inner tepals orbiculate or broadly ovate, 2.5-3.2 × 2.7-3.2 mm, base broadly cordate or rounded, apex obtuse or subacute; tubercles absent or some inner tepals with slightly swollen central veins. Achenes brown or dark brown, 0.9-1.2 × 0.6-0.8 mm. 2n = 8 (pistillate plants), 9 (staminate plants), 10 (both sexes).