Rumex californicus

Rechinger f.

Repert. Spec. Nov. Regni Veg. 40: 297. 1936

Common names: California willow dock
Synonyms: Rumex salicifolius var. denticulatus Torrey
Treatment appears in FNA Volume 5. Treatment on page 509. Mentioned on page 492, 510, 516.
Plants perennial, glabrous, with vertical rootstock. Stems usually ascending, rarely decumbent-ascending or suberect, usually producing axillary shoots below 1st-order inflorescence or at proximal nodes, 30–60 cm. Leaf blades linear-lanceolate or linear-oblanceolate, 5–10 × 1–3 cm, usually ca. (3–)5–7 times as long as wide, usually widest near middle, thin or, occasionally, subcoriaceous, base cuneate, margins entire, flat or, occasionally, undulate near base, apex acute or attenuate. Inflorescences terminal and axillary, terminal usually occupying distal 1/5–1/3 of stem, lax, interrupted at least in proximal 1/2, usually broadly paniculate (branches simple or with few 2d-order branches). Pedicels articulated in proximal 1/3 or almost near base, filiform, 3–8 mm, not more than 2–2.5 times as long as inner tepals, articulation indistinctly swollen. Flowers 10–15(–20) in whorls; inner tepals usually broadly triangular or deltoid, 2.5–3.5 × 2.2–3.3 mm, base truncate, margins minutely but distinctly denticulate, rarely subentire, apex obtuse or subacute; tubercles absent, or only 1 midvein slightly swollen. Achenes brown or dark reddish brown, 2 × 1.3 mm. 2n = 20.

Phenology: Flowering late spring–summer.
Habitat: Moist coastal, alluvial, and montane habitats
Elevation: 0-3000 m


V5 1043-distribution-map.gif

Ariz., Calif., Nev., Oreg., possibly n Mexico.


Rumex californicus is closely related to and often is regarded as a variety of R. salicifolius.

In Oregon this species has been reported only as a ballast waif in the Albina neighborhood of Portland (K. H. Rechinger 1937). It has been reported also from northeastern Nevada (J. T. Kartesz 1987, vol. 1), New Mexico (W. C. Martin and C. R. Hutchins 1980), and Wyoming (N. M. Sarkar 1958), but these records require confirmation.

Selected References


Lower Taxa


Facts about "Rumex californicus"
AuthorSergei L. Mosyakin +
AuthorityRechinger f. +
Common nameCalifornia willow dock +
DistributionAriz. +, Calif. +, Nev. +, Oreg. + and possibly n Mexico. +
Elevation0-3000 m +
HabitatMoist coastal, alluvial, and montane habitats +
IllustrationPresent +
Illustration copyrightFlora of North America Association +
IllustratorYevonn Wilson-Ramsey +
PhenologyFlowering late spring–summer. +
Publication titleRepert. Spec. Nov. Regni Veg. +
Publication year1936 +
ReferenceNone +
Source xml grained fna xml/V5/V5 1043.xml +
SynonymsRumex salicifolius var. denticulatus +
Taxon familyPolygonaceae +
Taxon nameRumex californicus +
Taxon parentRumex sect. Axillares +
Taxon rankspecies +
VolumeVolume 5 +