Flora of the Hawaiian Islands
Dicotyledon Literature for Rumex acetosella
Wagner et al., 1990, 1999.
   Polygonaceae -- The Buckwheat Family Bibliography
      Rumex acetosella

Common name(s): dock, sorrel, sheep sorrel
General Information
DistributionNative to Eurasia, now widely naturalized in temperate and subtropical regions primarily of the Northern Hemisphere.In the Hawaiian Islands, naturalized on Kaua`i, Maui, Hawai`i.

Slender perennial herbs from a short, somewhat woody rhizome, foliage with a strong sour taste; stems erect, 2-5 dm long.
Leaves primarily basal, lanceolate to oblong, 3-6(-10) cm long, 1-2 cm wide, glabrous or nearly so, apex acute to obtuse, base narrowly hastate, sometimes some leaves without lobes and base cuneate, petioles 2-5 cm long.
Flowers unisexual (and the plants dioecious), in reddish, branched, racemose inflorescences; tepals ca. 1-1.2 mm long, the valves not enlarging in fruit.
Nuts purplish brown, ca. 1.2-1.5 mm long, the surface glossy, the valves readily separating from the nut.
2n = 14-16, 21-23, 28, 30, 32, 35, 38-43