Persicaria sagittata

(Linnaeus) H. Gross

Beih. Bot. Centralbl. 37(2): 113. 1919.

Common names: Arrow-leaf tearthumb arrow-vine renouée sagittée
Illustrated
Basionym: Polygonum sagittatum Linnaeus Sp. Pl. 1: 363. 1753
Synonyms: Polygonum sagittatum var. gracilentum Fernald Tracaulon sagittatum (Linnaeus) Soják Truellum sagittatum
Treatment appears in FNA Volume 5. Treatment on page 577. Mentioned on page 578.

Plants annual, 3–20 dm; roots also often arising from proximal nodes. Stems scandent, ribbed, glabrous; prickles 1–1.5 mm. Leaves: ocrea brownish, cylindric, (3–) 5–13 mm, chartaceous, base inflated or not, without prickles, margins oblique, glabrous or ciliate at tip with bristles 0.2–1 mm, surface glabrous; petiole 0.5–4 cm; blade broadly lanceolate to oblong, 2–8.5 × 1–3 cm, base sagittate to cordate, margins entire, ciliate or eciliate, apex obtuse to acute, faces glabrous or densely appressed-pubescent, usually with retrorse prickles along midvein abaxially. Inflorescences capitate or paniclelike, uninterrupted, 5–15 × 4–10 mm; peduncle 10–80 mm, usually glabrous, sometimes with retrorse prickles proximally; ocreolae overlapping, margins eciliate. Pedicels mostly ascending, 1–1.5 mm. Flowers 2–3 per ocreate fascicle; perianth white or greenish white, often tinged pink or red, sometimes entirely pink, glabrous, accrescent, not becoming blue and fleshy in fruit; tepals 5, connate 1/3–1/2 their length, broadly elliptic, 3–5 mm, apex obtuse; stamens 8, filaments distinct, free; anthers pink, ovate; styles 3, connate to middle. Achenes included or styles exserted, light or dark-brown to black, 3-gonous, 2.5–4 × 1.8–2.5 mm, dull to shiny, smooth to minutely punctate. 2n = 40.


Phenology: Flowering Jun–Oct.
Habitat: Moist shaded sites, meadows, pastures, fens, swamps, shorelines of ponds and streams
Elevation: 0-1000 m

Distribution

V5 1181-distribution-map.gif

Man., N.B., Nfld. and Labr. (Nfld.), N.S., Ont., P.E.I., Que., Ala., Ark., Colo., Conn., Del., D.C., Fla., Ga., Ill., Ind., Iowa, Kans., Ky., La., Maine, Md., Mass., Mich., Minn., Miss., Mo., Nebr., N.H., N.J., N.Y., N.C., N.Dak., Ohio, Okla., Pa., R.I., S.C., S.Dak., Tenn., Tex., Vt., Va., W.Va., Wis., e Asia

Discussion

Persicaria sagittata is an extremely variable species. Achene and leaf characters have been used by some authors to separate North American and Asian populations, but these characters show weak geographic variation (C. W. Park 1988).

Selected References

None.

Lower Taxa

None.

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

... more about "Persicaria sagittata"
dark-brown;black +
exserted +  and included +
spheroidal +, 2-3-gonous +, biconvex +  and discoid +
obtuse;obtuse;acute +
not +  and swollen +
Harold R. Hinds† +  and Craig C. Freeman +
(Linnaeus) H. Gross +
sagittate +  and cordate +
Polygonum sagittatum +
2 cm20 mm <br />0.02 m <br /> (8.5 cm85 mm <br />0.085 m <br />) +
broadly lanceolate;oblong +
1 cm10 mm <br />0.01 m <br /> (3 cm30 mm <br />0.03 m <br />) +
lunate +, triangular +  and dark +
foliaceous +  and perfoliate +
scale-like +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
just below the soil surface or and above the soil surface +  and spreading +
Arrow-leaf tearthumb +, arrow-vine +  and renouée sagittée +
Man. +, N.B. +, Nfld. and Labr. (Nfld.) +, N.S. +, Ont. +, P.E.I. +, Que. +, Ala. +, Ark. +, Colo. +, Conn. +, Del. +, D.C. +, Fla. +, Ga. +, Ill. +, Ind. +, Iowa +, Kans. +, Ky. +, La. +, Maine +, Md. +, Mass. +, Mich. +, Minn. +, Miss. +, Mo. +, Nebr. +, N.H. +, N.J. +, N.Y. +, N.C. +, N.Dak. +, Ohio +, Okla. +, Pa. +, R.I. +, S.C. +, S.Dak. +, Tenn. +, Tex. +, Vt. +, Va. +, W.Va. +, Wis. +  and e Asia +
0-1000 m +
appressed-pubescent +  and glabrous +
free +  and distinct +
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 +
Moist shaded sites, meadows, pastures, fens, swamps, shorelines of ponds and streams +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
0.18 cm1.8 mm <br />0.0018 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
paniclelike +  and capitate +
0.4 cm4 mm <br />0.004 m <br /> (1 cm10 mm <br />0.01 m <br />) +
nonmembranous +
deciduous +
not auriculate +
eciliate +, ciliate +  and glabrous +
lobed +  and entire +
swollen +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
disintegrating +
deciduous +  and persistent +
scabrous +  and variously pubescent +
cylindric +
0.5 cm5 mm <br />0.005 m <br /> (1.3 cm13 mm <br />0.013 m <br />) +
coriaceous +
anatropous +, , +  and orthotropous +
accrescent +
0.1 cm1 mm <br />0.001 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
spreading;erect +
1 cm10 mm <br />0.01 m <br /> (8 cm80 mm <br />0.08 m <br />) +
blue;pink;red;tinged pink;greenish white;white +
campanulate +
accrescent +
0.5 cm5 mm <br />0.005 m <br /> (4 cm40 mm <br />0.04 m <br />) +
Flowering Jun–Oct. +
(2-)3(-4)-carpellate +
0.1 cm1 mm <br />0.001 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
Beih. Bot. Centralbl. +
slender;stout +
Illustrated +
branched +  and simple +
erect +  and ascending +
penicillate +, fimbriate +  and capitate +
deciduous +  and persistent +
2-lobed +  and cylindric +
coriaceous +  and membranous +
deciduous +
spreading;erect +
spreading;erect +
Polygonum sagittatum var. gracilentum +, Tracaulon sagittatum +  and Truellum sagittatum +
Persicaria sagittata +
Persicaria sect. Echinocaulon +
species +
1/3 +  and 1/2 +
lobed +  and laciniate +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
coriaceous +
persistent +
membranous +
pubescent +  and glabrous +
stoloniferous +, rhizomatous +, fibrous-rooted +  and taprooted +
12 +, 11 +  and 10 +