Rumex thyrsiflorus

Fingerhuth

Linnaea 4: 380. 1829.

Common names: Narrow-leaved sorrel grande oseille thyrsiflore
IntroducedIllustrated
Synonyms: Acetosa thyrsiflora (Fingerhuth) Á. Löve & D. Löve Rumex acetosa subsp. auriculatus (Wallroth) A. Blytt & O. C. Dahl Rumex acetosa var. auriculatus Wallroth Rumex acetosa var. crispus (Roth)    elakovský Rumex acetosa var. haplorhizus (Czernjaev ex Turczaninow) Trautvetter Rumex acetosa subsp. thyrsiflorus (Fingerhuth) elakovský Rumex auriculatus Rumex haplorhizus
Treatment appears in FNA Volume 5. Treatment on page 504. Mentioned on page 491, 503.

Plants perennial, glabrous or nearly so, with thick, vertical or oblique rootstock (reaching deep into substrate) and remote 2d-order roots. Stems usually erect, several from base, or occasionally solitary, branched in distal 1/2 (in inflorescence), (30–) 40–100 (–130) cm. Leaves: ocrea often with fringed margins; blade oblong-lanceolate to lanceolate, 3–12 (–15) × 1–3 (–5) cm, usually more than 4 times as long as wide, base sagittate or sometimes hastate (with acute lobes directed downward, ± parallel to petiole, or often reflexed outward), margins entire to obscurely and irregularly repand, usually crisped and undulate, occasionally flat, apex acute. Inflorescences terminal, occupying distal 1/3 of stem, usually dense, or interrupted in proximal part, broadly paniculate, pyramidal (1st-order branches usually repeatedly branched, with numerous 2d-order branches). Pedicels articulated near middle, filiform, 2–6 (–7) mm, articulation distinct. Flowers (3–) 4–8 (–12) in whorls; inner tepals orbiculate, occasionally broadly ovate, 2.5–3.5 (–4) × 2.5–3.5 mm, base rounded, truncate, or slightly cordate, apex obtuse; tubercles small or occasionally absent. Achenes black or dark-brown, 1.5–1.8 × 0.8–1.2 mm, normally smooth. 2n = 14 (pistillate plants), 15 (staminate plants).


Phenology: Flowering late spring–early summer.
Habitat: Meadows, alluvial habitats, waste places, roadsides, edges of woods
Elevation: 0-1400 m (in Europe)

Distribution

V5 1031-distribution-map.gif

Introduced; N.B., N.S., Ont., Que., Sask., Mich., c, e Europe, c Asia (s Siberia), elsewhere

Discussion

Rumex thyrsiflorus is commonly misidentified as R. acetosa. The growth habit (stout, vertical rootstock), narrower, often undulate leaves with often slightly spreading basal lobes (however, some European specimens have the lobes of distal and middle cauline leaves curved inward), and pyramidal, usually much-branched panicle of R. thyrsiflorus are traits especially useful for field identification. In addition, the inner tepals of R. thyrsiflorus are distinctly smaller than those of R. acetosa. The southern European (Mediterranean) race of R. thyrsiflorus, characterized by narrower leaves with more spreading, almost hastate basal lobes and fruiting inner tepals less cordate at the base, is sometimes recognized as R. intermedius de Candolle [= Acetosa thyrsiflora subsp. intermedia (de Candolle) Á. Löve]. The same forms occasionally occur in North America (Á. Löve 1986).

Selected References

None.

Lower Taxa

None.

"/2" is not declared as a valid unit of measurement for this property.

... more about "Rumex thyrsiflorus"
unwinged +  and weakly winged +
dark-brown;black +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.18 cm1.8 mm <br />0.0018 m <br />) +
pyramidal +, compressed-3-gonous +  and 3-gonous +
0.8mm;1.2mm +
yellow +  and brownish yellow +
ovate +  and elongate +
obtuse;acute +
Sergei L. Mosyakin +
Fingerhuth +
not articulated +
cordate +, truncate +, rounded +, hastate +  and sagittate +
Undefined subg. Acetosa +
12 cm120 mm <br />0.12 m <br /> (15 cm150 mm <br />0.15 m <br />) +
3 cm30 mm <br />0.03 m <br /> (5 cm50 mm <br />0.05 m <br />) +
3 cm30 mm <br />0.03 m <br /> (12 cm120 mm <br />0.12 m <br />) +
oblong-lanceolate;lanceolate +
1 cm10 mm <br />0.01 m <br /> (3 cm30 mm <br />0.03 m <br />) +
foliaceous +  and perfoliate +
scale-like +
tuberculate +
just below the soil surface or and above the soil surface +  and spreading +
Narrow-leaved sorrel +  and grande oseille thyrsiflore +
N.B. +, N.S. +, Ont. +, Que. +, Sask. +, Mich. +, c +, e Europe +, c Asia (s Siberia) +  and elsewhere +
0-1400 m (in Europe) +
free +  and distinct +
pistillate +  and staminate +
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 +
Meadows, alluvial habitats, waste places, roadsides, edges of woods +
0.35 cm3.5 mm <br />0.0035 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
always distinctly wider and longer +
ovate +  and orbiculate +
3 cm30 mm <br />0.03 m <br /> (?) +
2.5mm +  and 3.5mm +
nonmembranous +
cordate +, cuneate +  and hastate +
deciduous +
cauline +  and basal +
pubescent +  and glabrous +
undulate +, crisped +, repand +  and fringed +
smaller +
narrower +
swollen +
partly +  and foliaceous +
deciduous +  and persistent +
cylindric +
membranous +
spreading +  and reflexed +
anatropous +, , +  and orthotropous +
0.6 cm6 mm <br />0.006 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
accrescent +
0.2 cm2 mm <br />0.002 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
spreading;erect +
red;pinkish;red;pinkish;green +
campanulate +
accrescent +
fleshy +, indurate +  and membranous +
Flowering late spring–early summer. +
(2-)3(-4)-carpellate +
slender;stout +
oblique +  and vertical +
Introduced +  and Illustrated +
sagittate +
100 cm1,000 mm <br />1 m <br /> (130 cm1,300 mm <br />1.3 m <br />) +
papillose-pubescent +  and glabrous +
1/3 +  and several +
40 cm400 mm <br />0.4 m <br /> (100 cm1,000 mm <br />1 m <br />) +
plumose +  and fimbriate +
deciduous +  and persistent +
2-lobed +  and cylindric +
coriaceous +  and membranous +
distinct +
reflexed;spreading +
spreading;erect +
Acetosa thyrsiflora +, Rumex acetosa subsp. auriculatus +, Rumex acetosa var. auriculatus +, Rumex acetosa var. crispus +, Rumex acetosa var. haplorhizus +, Rumex acetosa subsp. thyrsiflorus +, Rumex auriculatus +  and Rumex haplorhizus +
Rumex thyrsiflorus +
Rumex subg. Acetosa +
species +
lobed +  and laciniate +
coriaceous +
persistent +
membranous +
pubescent +  and glabrous +
stoloniferous +  and rhizomatous +
nearly +  and glabrous +
10 +, 9 +, 8 +  and 7 +