Rumex mexicanus
Rumex brownii
Mexican dock, Mexican willow, Mexican willow or dock
Brown's dock
erect or ascending, usually producing axillary shoots below 1st-order inflorescence or at proximal nodes, 30–60(–90) cm.
erect or ascending, divaricately branched in distal 1/2–2/3, 30–80(–100) cm.
blades light green to yellowish green, linear-lanceolate, occasionally lanceolate, 6–14 × 1–3.5(–4) cm, usually ca. 5–7 times as long as wide, widest near middle, thin, not coriaceous, base cuneate, margins entire, flat or undulate, apex acute or attenuate.
ocrea deciduous or partially persistent;
blade shape variable, oblong to lanceolate or lanceolate-linear, often panduriform, contracted near or proximal middle, (3–)5–15(–17) × 1–3(–5) cm, base truncate, slightly cordate, or broadly cuneate, margins entire, normally slightly undulate and crisped, apex acute or subobtuse.
terminal and axillary, terminal usually occupying distal 1/5–1/3 of stem, rather dense or interrupted in proximal 1/2, usually broadly paniculate (branches simple or with few 2d-order branches).
terminal, occupying distal 2/3 or most of stem, lax, interrupted in proximal part or throughout, broadly paniculate, branches spreading.
articulated in proximal 1/3 or almost near base, filiform (thickened distally), 4–7 mm, not more than 2–2.5 times as long as inner tepals, articulation indistinctly swollen.
articulated in proximal 1/3, filiform (occasionally thickened distally), 2.5–5 mm, usually as long as or slightly longer than inner tepals, articulation distinctly swollen.
10–20 in whorls;
inner tepals broadly ovate-triangular, occasionally broadly triangular, 3.5–4.5(–5) × 3.5–4(–5) mm, base truncate or indistinctly cordate, margins entire or indistinctly erose, apex obtuse or subacute;
tubercles 3, equal or subequal (much narrower than inner tepals).
5–8(–10) in rather lax remote whorls;
inner tepals broadly to narrowly triangular, 2.5–4 × 1.5–2.3 mm (excluding teeth), base truncate or broadly cuneate, margins prominently dentate, apex acute and ending in hooked tooth, teeth 3–5, at each side of margins, hooked, 0.5–1.5 mm;
tubercles absent, or midveins indistinctly swollen.
brown or dark reddish brown, 2–3 × 1.5–2 mm.
reddish brown, 1.8–2.3 × 1.2–1.5 mm.
= 40.
= 20.
Rumex mexicanus
Rumex brownii
Some authors recognize Rumex mexicanus in the broad sense, including in it many other taxa treated here as separate entities. For consistency, the entities of the R. salicifolius aggregate that are recognized herein are kept separate pending additional taxonomic research.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Rumex brownii, an uncommon “wool alien” in North America, was collected in South Carolina in the late 1950s (J. E. Dawson 1979). It is uncertain if it persists there. It occasionally occurs in Europe as a casual alien. This species is a member of subsect. Acrancistron Rechinger f. (see K. H. Rechinger 1984), which includes two Australian species.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
OR
Flora NW
PNW Herbaria
WildflowerSearch
iNaturalist
USDA Plants Database
