Peachysteve's picture

Lesser Burdock

Observed: 18th August 2012 By: PeachystevePeachysteve’s reputation in PlantsPeachysteve’s reputation in PlantsPeachysteve’s reputation in PlantsPeachysteve’s reputation in PlantsPeachysteve’s reputation in Plants
SAM_8387
SAM_8385
SAM_8386
SAM_8383
Description:

Flowers up to 40mm. Florets not projecting.
However lower leaves longer than wide so possibly an intermediate burdock.

Identifications
Species interactions

No interactions present.

Comments

cicuta58's picture

Leaves

I am interested to know where the idea that the leaf dimensions are a distinguishing feature comes from. Never heard it other than on iSpot. John Poland's Vegetative Key does not use it or even mention A. lappa curiously as its solid petioles are a give-away.

cicuta58

Peachysteve's picture

Collins Complete Guide to British Wild Flowers

Collins Complete Guide to British Wild Flowers says that lesser burdock's basal leaves are "longer than wide" while greater burdock's basal leaves are "as long as wide".
That's the book I take out with me for reference.

cicuta58's picture

Collins

It is a useful book, but I would place greater reliance on the hollow stems of basal leaves in minus agg. and solid for lappa. You can sometimes tell by squeezing, but there is no harm in cutting one leaf off. You will see a clear floral difference in lappa when you find it!

cicuta58

Peachysteve's picture

Thanks

I will keep that in mind. When plants are locally common I can examine them repeatedly and over time which helps. Burdock is one I rarely see. Getting it wrong helps me to look more closely at things. When I find lappa I'll be ready for it :)