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black bindweed, climbing bindweed, climbing knotweed, Eurasian black bindweed, ivy bindweed

Bukhara fleeceflower, Chinese bindweed, Chinese fleecevine, mile-a-minute vine, Russian vine, silver lace vine

Habit Herbs, annual, not rhizomatous, 0.5–1 m.
Stems

scandent or sprawling, branched proximally, herbaceous, puberulent, sometimes mealy, not glaucous.

climbing, branched from near base, woody, glabrous, not glaucous.

Leaves

ocrea persistent or deciduous, tan or greenish brown, cylindric, 2–4 mm, margins oblique, face not fringed with reflexed hairs and slender bristles at base, otherwise glabrous or scabrid;

petiole 0.5–5 cm, puberulent in lines;

blade cordate-ovate, cordate-hastate, or sagittate, 2–6(–15) × 2–5(–10) cm, base cordate, margins wavy, scabrid, apex acuminate, abaxial face usually mealy and, rarely, minutely dotted, not glaucous, adaxial face glabrous.

ocrea usually deciduous, hyaline or brownish, cylindric, 3–8 mm, margins truncate to oblique, face glabrous throughout;

petiole 1–4 cm, glabrous or scabrid;

blade narrowly ovate to ovate-oblong, 3–10 × 1–5 cm, base subcordate or cordate to sagittate, margins entire or wavy, glabrous or scabrid, apex obtuse to acuminate, abaxial face glabrous or scabrid along midvein, rarely minutely dotted, not glaucous, adaxial face glabrous.

Inflorescences

axillary, erect or spreading, spikelike, 2–10(–15) cm, axes puberulent;

peduncle 0.1–10 cm or absent, glabrous or scabrid distally in lines.

axillary and terminal, spreading or drooping, paniclelike, 3–15 cm, axes glabrous or papillate to scabrid in lines;

peduncle 1–3 cm, glabrous or scabrid.

Pedicels

ascending or spreading, articulated distally, 1–3 mm, glabrous or, rarely, scabrid.

ascending or spreading, articulated proximal to middle, 1.5–4 mm, glabrous or scabrid.

Flowers

bisexual, 3–6 per ocreate fascicle;

perianth nonaccrescent, greenish white, often with pinkish or purplish base, 3–5 mm including stipelike base, glabrous or outer 3 with blunt, hyaline hairs;

tepals elliptic to obovate, apex obtuse to acute, outer 3 obscurely keeled;

stamens 8;

filaments flattened proximally, glabrous;

styles connate distally;

stigmas capitate.

bisexual, 3–6 per ocreate fascicle;

perianth accrescent in fruit, greenish white with white wings or mostly pink, sometimes bright pink in fruit, 5–8 mm including stipelike base, glabrous;

tepals elliptic, apex obtuse to rounded, outer 3 winged;

stamens 6–8;

filaments flattened proximally, pubescent proximally;

styles connate basally;

stigmas peltate.

Achenes

included, black, 4–5(–6) × 1.8–2.3 mm, dull, minutely granular-tuberculate, especially on faces; fruiting perianth glabrous or with blunt, hyaline hairs, wings absent or, rarely, flat to undulate, 0.4–0.9 mm wide at maturity, scarcely decurrent on stipelike base, margins entire.

included, dark brown to black, 2–4 × 1.8–2.2 mm, shiny, smooth; fruiting perianth glabrous, wings flat to undulate, 2–4 mm wide at maturity, decurrent on stipelike base nearly to articulation, margins entire.

Vines

, perennial, not rhizomatous, 3–10 m.

2n

= 40.

= 20 (Korea).

Fallopia convolvulus

Fallopia baldschuanica

Phenology Flowering May–Oct. Flowering Aug–Sep.
Habitat Cultivated ground, waste places Disturbed sites
Elevation 0-2700 m (0-8900 ft) 0-1600 m (0-5200 ft)
Distribution
from FNA
AK; AL; AR; AZ; CA; CO; CT; DC; DE; FL; GA; IA; ID; IL; IN; KS; KY; LA; MA; MD; ME; MI; MN; MO; MS; MT; NC; ND; NE; NH; NJ; NM; NV; NY; OH; OK; OR; PA; RI; SC; SD; TN; TX; UT; VA; VT; WA; WI; WV; WY; AB; BC; MB; NB; NL; NS; ON; PE; QC; SK; YT; SPM; Greenland; Eurasia [Introduced in North America; introduced in South America (Argentina, Chile), Africa (Algeria, Morocco, Republic of South Africa), Pacific Islands (Hawaii, New Zealand), Australia]
[WildflowerSearch map]
[BONAP county map]
from FNA
CA; CO; MA; MD; MI; NJ; NM; NY; PA; UT; VA; WA; c Asia [Introduced in North America; introduced in Central America (Costa Rica), Europe]
[WildflowerSearch map]
[BONAP county map]
Discussion

Fallopia convolvulus can be an aggressive weed in crop fields. Rare plants with winged fruiting perianths have been named var. subalata; that characteristic often varies within populations.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Fallopia baldschuanica is cultivated as a trellis and garden plant; it escapes infrequently in the flora area. Plants with white or greenish white flowers and papillate or scabrid inflorescence axes have been recognized as F. aubertii.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Source FNA vol. 5, p. 545. FNA vol. 5, p. 544.
Parent taxa Polygonaceae > subfam. Polygonoideae > Fallopia Polygonaceae > subfam. Polygonoideae > Fallopia
Sibling taxa
F. baldschuanica, F. cilinodis, F. dumetorum, F. japonica, F. sachalinensis, F. scandens, F. ×bohemica
F. cilinodis, F. convolvulus, F. dumetorum, F. japonica, F. sachalinensis, F. scandens, F. ×bohemica
Synonyms Polygonum convolvulus, Bilderdykia convolvulus, F. convolvulus var. subalata, Reynoutria convolvulus, Tiniaria convolvulus Polygonum baldschuanicum, Bilderdykia aubertii, Bilderdykia baldschuanica, F. aubertii, Polygonum aubertii, Reynoutria baldschuanica
Name authority (Linnaeus) Á. Löve: Taxon 29: 300. (1970) (Regel) Holub: Folia Geobot. Phytotax. 6: 176. (1971)
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