NS5272 : Dotted Loosestrife

taken 4 years ago, near to Drumchapel, Glasgow, Great Britain

Dotted Loosestrife
Dotted Loosestrife
(Lysimachia punctata or Lysimachia verticillaris)

Historically, there has been much confusion over the correct identification of the yellow-flowered varieties of loosestrife: see NS3878 : Yellow Loosestrife for some references.

The plant in the present picture is, at least in a broad sense, Dotted Loosestrife, and it would key out in some works as L. punctata, and in others as L. verticillaris. That is why I have given two different Latin names above, although it was debatable (at the time when I submitted this picture) whether they were to be considered synonyms or separate species(*).

One of the references in the item linked above sets out the differences between typical examples of these species. Stace (2ed) would makes this plant L. punctata; it makes no mention of L. verticillaris. Stace (3ed) makes those names synonyms, but it notes the occurrence of all intermediates between the forms that are described as typical of L. punctata and L. verticillaris.

In contrast, the cited paper by McAllister (1999) would make this specimen L. verticillaris, on account of the orange base of the petals, and would make it distinct from L. punctata. Confusingly, the name L. verticillata (rather than verticillaris) is employed in some references.

As the third edition of Stace's Flora points out, this genus and a couple of others closely related to it probably need to be re-organised (I suspect that until the taxonomic difficulties are sorted out, and the distinguishing characteristics set out clearly in language that is accessible to the non-specialist, many will simply decide that the identification of yellow-flowered loosestrife plants to species is more trouble than it is worth).

See NS5272 : Disused workings for context, and NS5272 : Disused workings for more details of the underlying geology.

There were several more patches of this species nearby, as well as a few examples of Purple Iris (Iris versicolor), which is found in marshy environments (as here), and beside rivers and lakes.

- - • - -

(*) For more recent comments on this subject, see a 2016 paper in
Plant Ecology and Evolution 149 (3): 335–338, 2016:

"Genome fingerprinting confirms the species status of the Loosestrifes
Lysimachia punctata and L. verticillata (Primulaceae)"
Yann Triponez, Begüm Şepitci & Nadir Alvarez.
Garscadden Wood (West) :: NS5172
One of four areas of woodland that collectively make up Drumchapel Woods — LinkExternal link . Garscadden Wood (East and West – the halves are separated by Peel Glen Road) is a Local Nature Reserve, the land being owned by Glasgow City Council but managed by the Forestry Commission Scotland.
Drumchapel Woods :: NS5271
Drumchapel Woods, one of the Commonwealth Woods, is made up of four areas of woodland arranged in a ring around Drumchapel. Those areas are as follows: (1) Garscaddan Wood (West) – LinkExternal link , (2) Garscadden Wood (East) – LinkExternal link , (3) Garscadden Burn Park – LinkExternal link , and (4) Cleddans Burn – LinkExternal link .
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NS5272, 50 images   (more nearby )
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Date Taken
Friday, 3 July, 2015   (more nearby)
Friday, 24 July, 2015
Geographical Context
Quarrying, Mining  Derelict, Disused 
Image Buckets ?
Closeup  Life 
Primary Subject of Photo
Plant (from Tags)
Dotted Loosestrife 
Subject Location
OSGB36: geotagged! NS 5213 7217 [10m precision]
WGS84: 55:55.1889N 4:22.0676W
Camera Location
OSGB36: geotagged! NS 5213 7217
View Direction
EAST (about 90 degrees)
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