Rumex hastatulus
Rumex krausei
heartwing dock, heartwing sorrel, wild dock, wild sorrel
Krause or Cape Krause sorrel, Krause's sorrel
solitary or several from base, erect or ascending, branched in distal 2/3 (in inflorescence), 10–40(–45) cm.
erect or slightly ascending, 1 or several from base, sparsely branched in inflorescence,occasionally inflorescence simple or nearly so, 8–20(–25) cm;
shoots usually densely crowded, not elongated.
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.
ocrea brownish, membranous;
blade narrowly linear or spatulate-lanceolate, not hastate (without basal lobes), 2.5–6 × 0.15–0.3(–0.4) cm, base narrowly cuneate (gradually narrowing into petiole), margins entire, flat or slightly revolute, apex obtuse or subacute.
terminal, occupying distal 2/3 of stem, usually lax and interrupted, narrowly paniculate.
terminal, occupying distal 1/2 of stem, usually dense, narrowly paniculate with branches directed upward, or simple.
articulated in proximal part, filiform, 1.5–2.5(–3) mm, articulation indistinct or slightly swollen.
1–4 mm.
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.
3–7 in whorls;
inner tepals distinctly enlarged, 2.3–3 × 1.8–3 mm (free wing 0.4–0.8 mm wide), base cuneate, apex obtuse or subacute.
brown or dark brown, 0.9–1.2 × 0.6–0.8 mm.
light brown, 1.5–2 × 1.2–1.9 mm.
= 8 (pistillate plants), 9 (staminate plants), 10 (both sexes).
= 21.
Rumex hastatulus
Rumex krausei
Rumex hastatulus is distinct in subg. Acetosa and belongs to the monotypic subsect. Americanae Á. Löve & N. Sarkar. It is represented by at least two chromosome races: populations occurring from North Carolina to Florida and Mississippi normally have 2n = 8 in pistillate plants and 2n = 9 in staminate plants; populations from Louisiana to Texas and Oklahoma predominantly have 2n = 10 in both sexes. Rumex hastatulus has been reported from New Mexico (W. C. Martin and C. R. Hutchins 1980, vol. 1), but those records need confirmation. When fruiting, R. hastatulus has large inner tepals that distinguish it from R. acetosella, with which it is occasionally confused.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
The name Rumex graminifolius was commonly misapplied to this species in northwestern North America and northeastern Eurasia.
Rumex krausei is closely related to R. beringensis and probably represents the latter’s triploid race. Rumex krausei differs from R. beringensis in having larger flowers, fruiting inner tepals, and fruits, and shorter and less-branched or unbranched inflorescences. Rumex krausei occurs in eastern Chukotka, Russia, together with R. beringensis; however, it is believed to be confined mostly to clay soils and limestones. It has been reported from the Ogotoruk River on the northwestern coast of Alaska (B. A. Jurtzev et al. 1975) and some other Alaskan regions (western Seward Peninsula, capes Dyer and Thompson, and the Squirrel River). It may be expected anywhere within the range of R. beringensis.
of conservation concern
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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