BEGGARTICKS

Bidens frondosa

Daisy & Dandelion Family [Asteraceae]

month8jul month8july month8aug month8sep month8sept month8oct

status
statusZneophyte
 
flower
flower8yellow
 
petals
petalsZ0
(5)
type
typeZclustered
 
stem
stem8round
 
stem
stem8ribbed
 

6th Sept 2012, Bosley Locks, Macclesfield Canal. Photo: © RWD
A medium, to 1m, shrub-like plant growing near freshwater, but not in it. Slightly taller than Trifid Bur-Marigold (Bidens tripartita) which stands only 60cm high.


6th Sept 2012, Bosley Locks, Macclesfield Canal. Photo: © RWD
A branched annual plant with brownish-red stems.


6th Sept 2012, Bosley Locks, Macclesfield Canal. Photo: © RWD
Lanceolate and coasely toothed leaves, most in triplets especially the lower leaves. Flowers singly at tops of branches.


6th Sept 2012, Bosley Locks, Macclesfield Canal. Photo: © RWD
Some leaves in opposite pairs.


6th Sept 2012, Bosley Locks, Macclesfield Canal. Photo: © RWD
Leaves may have a pair of lobes at the base (left), un-like those of London Bur-Marigold or Nodding Bur-Marigold.


6th Sept 2012, Bosley Locks, Macclesfield Canal. Photo: © RWD
A few as yet un-opened flower buds near the end of a branch. The sepals (actually 'phyllaries') curve over the cylindrical flower.


6th Sept 2012, Bosley Locks, Macclesfield Canal. Photo: © RWD
There are several smaller leaves/bracts, mainly un-toothed, around each flower.


6th Sept 2012, Bosley Locks, Macclesfield Canal. Photo: © RWD
Flowers have deep-yellow disc florets and only very rarely do they also have ray florets (not shown). The flowers are surrounded by two rows of spear-shaped sepals phyllaries that are a darker shade of green with a light-green edge. The stems are a dark purple/brown and ribbed.


6th Sept 2012, Bosley Locks, Macclesfield Canal. Photo: © RWD
Phyllaries are spear-shaped, dark-green and with a light-green edge. Hairs sparse.


24th sept 2014, nr. Martin Lane Bridge, Leeds & Liverpool Canal, Burscough Photo: © RWD


6th Sept 2012, Bosley Locks, Macclesfield Canal. Photo: © RWD
Deep yellow disc-florets.


6th Sept 2012, Bosley Locks, Macclesfield Canal. Photo: © RWD
Un-opened flower buds cylindrical with six curved wrap-over phyllaries. Leaves and bracts may have dark purple-red edges.


6th Sept 2012, Bosley Locks, Macclesfield Canal. Photo: © RWD
Lower leaves, in pairs, with a pair of lobes at the base, forming a triplet. Just like Trifid Bur-Marigold the leaves can have just one pair or two pairs of lobes at the sides. Leaves are coarsely toothed, un-like those of London Bur-Marigold which are rounded.


6th Sept 2012, Bosley Locks, Macclesfield Canal. Photo: © RWD
Un-like Trifid Bur-Marigold, the stems of the leaves have little or no wings.


Not to be semantically confused with : Branched Bur-Reed or Un-branched Bur-Reed [plants with similar name from a different family]

Easily mistaken for : Trifid Bur-Marigold (Bidens tripartita) - which has leaves with winged stalks, but the only true way to tell most of the Bur-marigolds apart is by close inspection of the seeds, which differ between species. The seeds of Beggarticks have a rough surface, those of Trifid Bur-Marigold a smooth surface. Sorry - no photos of seeds yet.

Some similarities to other Bur-marigolds such as :

  • Nodding Bur-Marigold (Bidens cernua) - but that has larger and broader flowers which are drooping, facing groundwards
  • London Bur-Marigold (Bidens connata) - but that has leaves that are not pinnately triplet and leaves much less toothed or not toothed
  • Trifid Bur-Marigold (Bidens tripartita but that has leaves that may be lobed rather than fully tri-leaf pinnate and has leaves that are winged to the junction with the branch.
The most reliable way to differentiate the Bidens genera from one another is by looking at the shape of one individual achene (seed) as seen from the side. Unfortunately, your Author has no photographs (yet).

It seems to have got the name 'Beggarticks' because the seeds are black and shaped a bit like ticks that beggars may carry. They are indeed most unusual seeds being flat and rectangular-shaped with two prongs emerging from the corners of one narrow side, projecting forwards. (Sorry - no photos yet).


  Bidens frondosa  ⇐ Global Aspect ⇒ Asteraceae  

Distribution
 family8Daisy & Dandelion family8Asteraceae

 BSBI maps
genus8Bidens
Bidens
(Bur-Marigolds)

BEGGARTICKS

Bidens frondosa

Daisy & Dandelion Family [Asteraceae]