Natterjacktoad's picture

Riverside crucifer

Observed: 22nd September 2011 By: Natterjacktoad
S159 Neighbourhood Nature - course complete
Natterjacktoad’s reputation in PlantsNatterjacktoad’s reputation in PlantsNatterjacktoad’s reputation in PlantsNatterjacktoad’s reputation in Plants
IMG_4020
IMG_4020 1
IMG_4020 1 2
Description:

Growing alongside rife. White-flowered crucifer c1.5m high, upper leaves linear, lower leaves distinctly lobed.

Identifications
Species interactions

No interactions present.

Species with which Horse-radish (Armoracia rusticana) interacts

Comments

Natterjacktoad's picture

Definitely not matronalis -

Definitely not matronalis - still in it's prime, leaves are wrong - in fact everything wrong!
I can't find it in the BSBI handbook (not that that means much!)

Sarah Patton

miked's picture

and its not horse raddish?

and its not horse raddish?

Natterjacktoad's picture

I don't think it's

I don't think it's Horse-radish - the lower leaves are wrong and it's far too late in the year! My first thought was that the flowers looked right but there weren't the distinctive long, upright lower leaves.

There was just one clump of this along the whole riverbank

Sarah Patton

corylus's picture

I did realise that it wasn't right for Hesperis which is why I

put it down as a "might be" as I find plants can vary widely due to our varying weather conditions.Looks like Sisymbrium but have only just come across S.supinum that has white fls. & have not done further check yet.

Hazel Trevan

Natterjacktoad's picture

S supinum is tiny!

S supinum is tiny!

Sarah Patton

cicuta58's picture

Lower leaves

The young lower leaves of horseradish are cut-up like that. If it was cut down and regrew, this might be the result.

cicuta58

corylus's picture

O.K

did say I hadn't checked it however Cicuta's theory agrees with mine about conditions.Could be pretty fertile along the banks.

Hazel Trevan