Rumex hymenosepalus
Rumex sect. Rumex
Arizona dock, canaigre, canaigre dock, cañaigre dock, wild-rhubarb
usually erect, rarely ascending, branched above middle, 25–90(–100) cm.
mostly erect, solitary or several from base, not branching below terminal paniculate inflorescence, without axillary shoots.
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.
blades variable in shape, base cordate to narrowly cuneate.
terminal, occupying distal 1/2 of stem, narrowly paniculate, rarely simple.
articulated near middle or in proximal 1/3, filiform, 5–15(–20) mm, articulation indistinct.
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.
with margins entire or variously dentate.
brown or reddish brown, 4–5(–7) × 2.5–4.5(–5) mm.
= 40.
Rumex hymenosepalus
Rumex sect. Rumex
Rumex hymenosepalus is the only species of subsect. Hymenosepali Rechinger f.
Two varieties have been recognized. The typical variety has achenes 5 mm and ovate-elliptic or oblong-cordate inner tepals with a subacute apex. Variety salinus (A. Nelson) Rechinger f. has larger achenes (to 7 mm) and almost orbiculate inner tepals with an obtuse apex.
Rumex hymenosepalus was reported also from Montana (J. E. Dawson 1979), but no exact localities were given.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Species ca. 110 (33 in the flora).
(Discussion copyrighted by Flora of North America; reprinted with permission.)
CA
PNW Herbaria
SW CO Wildflowers
WildflowerSearch
iNaturalist
USDA Plants Database
