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BLACK BINDWEED

Fallopia convolvulus

Dock & Knotweed Family [Polygonaceae]

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category
category8Climbers
category
category8Deciduous
status
statusZarchaeophyte
flower
flower8white
inner
inner8pink
petals
petalsZ0
stem
stem8angular

24th Aug 2011, Rainford, Merseyside. Photo: © RWD
A fast-growing climbing or prostrate annual which inhabits in arable fields as a weed, here in an arable field but pulled away from the vegetation it was intermingling with for clarity. Grows to 1m.


24th Aug 2011, Rainford, Merseyside. Photo: © RWD
Leaves in pairs on long thin stem.


24th Aug 2011, Rainford, Merseyside. Photo: © RWD
Ace of Spades shaped leaves.


24th Aug 2011, Rainford, Merseyside. Photo: © RWD
Flowers small in loose spikes.


24th Aug 2011, Rainford, Merseyside. Photo: © RWD
The flowers are similar to those on Docks, and have four small greenish-white tepals (bottom left)


24th Aug 2011, Rainford, Merseyside. Photo: © RWD
Tepals green with narrow white borders (lower left).


24th Aug 2011, Rainford, Merseyside. Photo: © RWD
Tepals often tinged reddish in central portions.


24th Aug 2011, Rainford, Merseyside. Photo: © RWD
Leaves admixed with flowers are tapered lanceolate, rather than ace-of-spades shaped.


24th Aug 2011, Rainford, Merseyside. Photo: © RWD


24th Aug 2011, Rainford, Merseyside. Photo: © RWD
The salks of the leaves where they ajoin the main stem often have the appearance of being knotted there as the stalks entwine about.


24th Aug 2011, Rainford, Merseyside. Photo: © RWD
Several flowers grow close to the junction of the leafes with stem, adding to the 'knotted' appearance there.


24th Aug 2011, Rainford, Merseyside. Photo: © RWD
An Ace-of-Spade shaped leaf.


Many similarities to : the rarer Copse Bindweed (Fallopia dumentorum) which grows up to three times longer at 3m, but the tepals have a wider white margin.

Varieties : (Calstegia convolvulus var. subalatum)

Slight resemblance to : Russian Vine (Fallopia baldschuanica) but that grows to 10m or more climbing vigorously over anything upon which it can obtain purchase, but the flowers are white, plentiful and in showy trusses.

No relation to : Calystegia genus Bindweeds such as Hedge Bindweed (Calstegia sepium) , Large Bindweed (Calstegia silvatica) , Hairy Bindweed (Calstegia pulchra) or Sea Bindweed (Calstegia soldanella) [plants with similar names].

Not a true Bindweed such as those belonging to the Convolvulaceae family like Sea Bindweed (Calstegia soldanella) and others belonging to the Calstegia genus, but has similar Ace-of-Spade shaped leaves, and can also climb, but it also sprawls if it finds nothing to clamber up. Fruit a small dull-black triangular nut on a very short 2mm stalk.

Black Bindweed is a Metallophyte with the potential to absorb 280ppm by weight of copper via the fine roots.

Three previously unknown flavonoids have been isolated from Black Bindweed, Falloconvalin A, Falloconvalin B and Quercetin-3-O-(2-E-sinapoxyl)-glucopyranoside.


  Fallopia convolvulus  ⇐ Global Aspect ⇒ Polygonaceae  

Distribution
 family8Dock & Knotweed family8Polygonaceae

 BSBI maps
genus8Fallopia
Fallopia
(Knotweeds)

BLACK BINDWEED

Fallopia convolvulus

Dock & Knotweed Family [Polygonaceae]

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