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Fallopia convolvulus
BLACK BINDWEED

Higher Taxonomy
Family: PolygonaceaeView DescriptionDichotomous Key

Common Name: BUCKWHEAT FAMILY
Habit: Annual to shrub [tree]. Stem: nodes swollen or not. Leaf: simple, basal or cauline, generally alternate; ocreae present or 0, generally scarious, persistent or not. Inflorescence: flower clusters in axillary to terminal cyme-, panicle-, raceme-, spike-, umbel- or head-like arrangements, entire inflorescence or main inflorescence branches generally subtended by bracts ("inflorescence bracts"); peduncles present or 0; flower clusters in Eriogoneae-Eriogonoideae subtended by involucre of >= 1 free or +- fused, sometimes awn-tipped bracts ("involucre bracts") or, in Polygonoideae and rarely in Eriogonoideae, not (if bracts completely fused, involucre "tubular"); pedicels in Eriogoneae each often subtended by 2 free, transparent, linear bractlets or in Polygonoideae all subtended by 2+ fused, membranous, wide bractlets. Flower: generally bisexual, small, 1--200 per node; perianth parts 2--6, generally in 2 whorls, free or basally fused, generally petal-like, often +- concave adaxially, often darker at midvein, often turning +- red or +- brown in age; stamens [1]3 or 6--9 in 2 whorls; ovary superior, 1-chambered, ovule 1, styles 1--3. Fruit: achenes, included in or exserted from perianth, generally 3-angled, ovoid or elliptic, generally glabrous.
Genera In Family: 48 genera, +- 1200 species: worldwide, especially northern temperate; some cultivated for food (Coccoloba, sea-grape; Fagopyrum, Rheum, Rumex) or ornamental (Antigonon, lovechain; Coccoloba; Muehlenbeckia; Persicaria; Polygonum), a few timbered (Coccoloba; Triplaris). Several (Emex; Fallopia; Persicaria; Polygonum; Rumex) are weeds. Note: Treatment of genera in Eriogonoideae based on monographic work of James L. Reveal. Involucre number throughout is number (1--many) per ultimate grouping, at tips of ultimate branches; flower number is per flower cluster or involucre, unless otherwise stated. Fagopyrum esculentum Moench not naturalized, considered an historical waif (or garden weed +- presently), therefore not treated.
eFlora Treatment Author: Mihai Costea, except as noted
Scientific Editor: Thomas J. Rosatti, Bruce G. Baldwin.
Genus: FallopiaView DescriptionDichotomous Key

Habit: Annual, perennial herb, vine or not. Stem: erect, trailing, or twining, glabrous or hairy, ribs 0. Leaf: cauline, alternate, petioled; ocrea persistent or not, cylindric, papery, opaque; blade broad-ovate to triangular, entire. Inflorescence: axillary, terminal, spike-, panicle-, or raceme-like; flowers 3--7; peduncle present or 0. Flower: bisexual or pistillate (1 kind per pl); perianth generally enlarging, bell-shaped, pale green or white to pink, glabrous, base stalk-like, parts 5, fused basally or +- completely, of 2 kinds, outer 3 generally winged, > inner 2; stamens 6--8, filaments free, wider basally, glabrous or hairy, anthers yellow to pink or red, ovate to elliptic; styles 3, spreading, fused basally or +- completely, stigmas head-like, fringed, or peltate. Fruit: included or exserted, 3-angled, brown to black. Seed: embryo straight.
Species In Genus: 12 species: America, Europe, Asia, Africa. Etymology: (for Gabriele Fallopio, 1523--1562, Italian professor of anatomy, botany, and surgery, for whom Fallopian tubes also named)

Fallopia convolvulus (L.) A. Löve
NATURALIZED
Habit: Annual, rhizomes 0. Stem: not woody, trailing or twining, 0.4--1.2 m, puberulent, fine-granular or not, branches proximal. Leaf: ocrea 2--4 mm, tan or green-brown, margin oblique, glabrous or scabrous; blade 2--6(15) cm, 2--5(10) cm wide, +- ovate, abaxially generally fine-granular, rarely minute-dotted, adaxially glabrous, base ovate, hastate, or sagittate, tip acuminate. Inflorescence: axillary, spike-like, 2--10(15) cm; peduncle 0--10 cm; pedicels 1--3 mm, glabrous (scabrous); flowers 3--6. Flower: bisexual, perianth not enlarging, 3--5 mm, green-white, often with +- pink base, glabrous or outer 3 lobes short-hairy, lobes elliptic to obovate, tips obtuse to acute, outer 3 +- keeled; stamens 8, filaments glabrous; styles fused distally, stigmas head-like. Fruit: included, 4--5(6) mm, 1.8--2.3 mm wide, black, dull, minute-granular-tubercled, especially on faces. Chromosomes: 2n=40.
Ecology: Disturbed places; Elevation: < 1000 m. Bioregional Distribution: CA-FP, MP; Distribution Outside California: to eastern North America; native to Europe. Flowering Time: May--Dec
Synonyms: Polygonum convolvulus L.; Bilderdykia convolvulus (L.) Dumort.; Reynoutria convolvulus (L.) Shinners; Tiniaria convolvulus (L.) Webb & Berthel.
eFlora Treatment Author: Mihai Costea
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Previous taxon: Fallopia baldschuanica
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Citation for this treatment: Mihai Costea 2016. Fallopia convolvulus, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=25754, accessed on February 06, 2016.

Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on February 06, 2016.


Fallopia convolvulus
click for enlargement
© 2009 Barry Breckling
Fallopia convolvulus
click for enlargement
© 2009 Barry Breckling

More photos of Fallopia convolvulus in CalPhotos


Geographic subdivisions for Fallopia convolvulus:
CA-FP, MP;
Markers link to CCH specimen records. If the markers are obscured, reload the page [or change window size and reload]. Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues.
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map of distribution 1
(Note: any qualifiers in the taxon distribution description, such as 'northern', 'southern', 'adjacent' etc., are not reflected in the map above, and in some cases indication of a taxon in a subdivision is based on a single collection or author-verified occurence).

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Data provided by the participants of the Consortium of California Herbaria.
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CCH collections by month

Duplicates counted once; synonyms included.
Species do not include records of infraspecific taxa.
Blue line denotes eFlora flowering time.