Rumex densiflorus
Rumex orthoneurus
dense-flower dock
Blumer's dock, Chiricahua dock, Chiricahua Mountain dock
erect, branched above middle (only in inflorescence), 50–100 cm.
erect, branched above middle (only in inflorescence), 60–100 cm.
ocrea deciduous or partially persistent at maturity;
blade with large lateral veins alternating with short ones, oblong or oblong-lanceolate, 30–40(–50) × 10–12 cm, more than 3 times as long as wide, base broadly cuneate, truncate, or weakly cordate, margins entire or indistinctly repand, flat, apex obtuse or broadly acute.
ocrea deciduous or partially persistent at maturity;
blade with lateral veins ± equal in size, oblong or oblong-lanceolate, 20–40(–50) × 8–15(–18) cm, more than 3 times as long as wide, base broadly cuneate, obtuse, or weakly cordate, margins entire, flat, apex acute, subacute, or acuminate.
terminal, occupying distal 1/2 of stem, usually dense, narrowly paniculate.
terminal, occupying distal 1/2 of stem, often dense, narrowly paniculate.
articulated in proximal 1/3, filiform, 6–16 mm, articulation indistinct.
articulated in proximal 1/2, filiform, (5–)12–15(–17) mm, articulation indistinct, scarcely visible.
10–20 in whorls;
inner tepals ovate-triangular or subcordate, 5–6 × 4.5–6 mm, widest at or near middle, base weakly emarginate, margins entire, erose, or indistinctly denticulate mostly at base, apex abruptly narrowed, acute or subacute;
tubercles absent.
10–20 in whorls;
inner tepals ovate-deltoid, 4.5–7 × 3.5–7 mm, widest in proximal 1/3, base truncate or weakly emarginate, margins erose to weakly serrate or indistinctly denticulate in basal part, apex acute to acuminate;
tubercles absent.
deep brown to reddish brown, 2.5–4(–4.5) × 1.8–2.5 mm.
brown, 2.5–4 × 1.5–2.5 mm.
= 120.
= 120.
Rumex densiflorus
Rumex orthoneurus
The following three species are closely related to Rumex densiflorus, all belonging to subsect. Densiflori Rechinger f., and possibly form one polymorphic “macrospecies” (K. H. Rechinger 1937). Á. Löve (1986) treated R. orthoneurus and R. pycnanthus as subspecies of R. densiflorus. However, the variability of this aggregate is insufficiently known, and I prefer to treat it as consisting of four “microspecies.”
Rumex densiflorus is reported from northwestern New Mexico (W. C. Martin and C. R. Hutchins 1980), where it most probably occurs; records for southern Idaho (R. J. Davis 1952) and Arizona (J. H. Lehr 1978) need confirmation.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Rumex orthoneurus has been reported from northern Mexico (M. Fishbein 1993). The species is in the Center for Plant Conservation’s National Collection of Endangered Plants.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
SW CO Wildflowers
WildflowerSearch
iNaturalist
USDA Plants Database
