Rumex utahensis

Rechinger f.

Repert. Spec. Nov. Regni Veg. 40: 298. 1936.

Common names: Utah willow dock
Endemic
Treatment appears in FNA Volume 5. Treatment on page 510. Mentioned on page 492, 509, 513.

Plants perennial, glabrous, with vertical rootstock. Stems usually erect, occasionally ascending, usually producing axillary shoots below 1st-order inflorescence or at proximal nodes, 15–40 (–60) cm. Leaf-blades lanceolate or linear-lanceolate, 6–15 × 2–3 cm, usually ca. 4–5 times as long as wide, widest near middle or slightly towards base, usually thin, base cuneate, margin entire, flat, rarely indistinctly undulate, apex acute. Inflorescences terminal and axillary, terminal usually occupying distal 1/5–1/3 of stem, dense or occasionally slightly interrupted at base, usually broadly paniculate (branches normally simple and crowded). Pedicels articulated in proximal 1/3 or almost near base, filiform (but thickened distally), 4–7 mm, not more than 2–2.5 times as long as inner tepals, articulation indistinctly or evidently swollen. Flowers 10–25 in whorls; inner tepals deltoid or broadly ovate-deltoid, 2.5–3 × 2.5–3 mm, base truncate or indistinctly cordate, margins entire, apex acute, rarely subacute; tubercles absent. Achenes dark reddish-brown or almost black, 1.8–2 × 1–1.3 mm. 2n = 40.


Phenology: Flowering late spring–summer.
Habitat: Shores of rivers and streams, wet meadows, rocky slopes
Elevation: 1000-3500 m

Distribution

V5 1044-distribution-map.gif

Alta., Calif., Colo., Idaho, Mont., Nev., Oreg., Utah, Wyo.

Discussion

The names Rumex mexicanus and R. salicifolius in the broad sense often have been applied to R. utahensis.

Records of “narrow-leaved forms” of Rumex utahensis from Yukon (E. Hultén 1968) probably refer to R. hultenii Tzvelev (see comments under 27. R. sibiricus) or R. sibiricus in the narrow sense.

Selected References

None.

Lower Taxa

None.

"/2" is not declared as a valid unit of measurement for this property.No values specified.

... more about "Rumex utahensis"
unwinged +  and weakly winged +
black;dark reddish-brown +
0.18 cm1.8 mm <br />0.0018 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
pyramidal +, compressed-3-gonous +  and 3-gonous +
1mm;1.3mm +
yellow +  and brownish yellow +
ovate +  and elongate +
Sergei L. Mosyakin +
Rechinger f. +
leafy +  and regular +
not articulated +
cordate +, truncate +  and cuneate +
crisped;undulate;flat;crisped;undulate;flat +
foliaceous +  and perfoliate +
scale-like +
tuberculate +
just below the soil surface or and above the soil surface +  and spreading +
Utah willow dock +
Alta. +, Calif. +, Colo. +, Idaho +, Mont. +, Nev. +, Oreg. +, Utah +  and Wyo. +
1000-3500 m +
free +  and distinct +
unisexual +, bisexual +  and , +
disarticulating +  and solid +
decumbent to erect +  and prostrate +
unwinged +  and winged +
black +, red +, brown +  and yellowish +
exserted +  and included +
pubescent +  and glabrous +
spheroidal +, 4-gonous +, lenticular +, biconvex +, discoid +, 3-gonous +  and 2-gonous +
Shores of rivers and streams, wet meadows, rocky slopes +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
always distinctly wider and longer +
ovate-deltoid +  and deltoid +
2.5mm +  and 3mm +
nonmembranous +
6 cm60 mm <br />0.06 m <br /> (15 cm150 mm <br />0.15 m <br />) +
deciduous +
cauline +  and basal +
pubescent +  and glabrous +
undulate +
smaller +
narrower +
swollen +
partly +  and foliaceous +
deciduous +  and persistent +
cylindric +
membranous +
anatropous +, , +  and orthotropous +
2+-2.5 times as long as inner tepals +
accrescent +
0.4 cm4 mm <br />0.004 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
campanulate +
accrescent +
fleshy +, indurate +  and membranous +
Flowering late spring–summer. +
(2-)3(-4)-carpellate +
40 cm400 mm <br />0.4 m <br /> (60 cm600 mm <br />0.6 m <br />) +
15 cm150 mm <br />0.15 m <br /> (40 cm400 mm <br />0.4 m <br />) +
Repert. Spec. Nov. Regni Veg. +
slender;stout +
not scapose +
decumbent +  and procumbent +
ascending +  and erect +
1/5 +  and 1/3 +
plumose +  and fimbriate +
deciduous +  and persistent +
? (?) +  and ? (?) +
coriaceous +  and membranous +
distinct +
reflexed;spreading +
Undefined subg. Lapathum +, Rumex sect. Lapathum +  and Rumex subg. Lapathum +
Rumex utahensis +
Rumex sect. Axillares +
species +
lobed +  and laciniate +
coriaceous +
persistent +
membranous +
pubescent +  and glabrous +
stoloniferous +  and rhizomatous +
10 +, 9 +, 8 +  and 7 +