Rumex mexicanus
Rumex hesperius
Mexican dock, Mexican willow, Mexican willow or dock
western willow dock
erect or ascending, usually producing axillary shoots below 1st-order inflorescence or at proximal nodes, 30–60(–90) cm.
usually ascending, usually producing axillary shoots below 1st-order inflorescence or at proximal nodes, 30–50(–60) 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.
blades light or yellowish green, veins scarcely prominent abaxially, elliptic-lanceolate, occasionally lanceolate, 6–12 × (2–)3–6 cm, usually (2–)3(–5) times as long as wide, widest near middle, thin, not coriaceous, base cuneate, margins entire, undulate, apex acute, warty in appearance.
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 and axillary, terminal usually occupying distal 1/5–1/3 of stem, dense or interrupted near base, usually broadly paniculate (branches simple or with few 2d-order branches).
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 (but thickened distally), 3–6 mm, not more than 2–2.5 times as long as inner tepals, articulation indistinctly 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).
10–20 in whorls;
inner tepals, triangular, broadly triangular, or deltoid, 3–4 × 3.5–4(–5) mm, base truncate, margins entire, apex acute or subacute;
tubercle 1, small, narrow, much narrower than inner tepals, smooth to weakly rugose.
brown or dark reddish brown, 2–3 × 1.5–2 mm.
not seen.
= 40.
= 20.
Rumex mexicanus
Rumex hesperius
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 hesperius is a little-known species reported only from a localized area in Washington. According to N. M. Sarkar (1958) it is “quite distinct from other species” in its general appearance—a small plant with large, broad leaves and compact inflorescences.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
OR
Flora NW
PNW Herbaria
WildflowerSearch
iNaturalist
USDA Plants Database
