Hatted_Botanist's picture

Winter Cress

Observed: 10th August 2013 By: Hatted_BotanistHatted_Botanist’s reputation in PlantsHatted_Botanist’s reputation in PlantsHatted_Botanist’s reputation in PlantsHatted_Botanist’s reputation in Plants
2013-08-10 12.11.15
2013-08-10 12.11.27
Description:

on gravel on the shore well above high water mark

Identifications
Species interactions

No interactions present.

Species with which Creeping Yellow-Cress (Rorippa sylvestris) interacts

Comments

Hatted_Botanist's picture

Winter Cress vs Creeping Yellow Cress

I still think it is Barbarea not Rorippa, here's why:
The stem leaves were simple
The petals were 5 - 8 mm
The main leaves in the photos are not typical but the leaves at the top of the photo are typical of Barbarea not Rorippa
The fruits were not well developed but looked more square than circular in cross section

Ambroise's picture

Well, the two plant may have

Well, the two plant may have been growing together, but the picture here really looks like Rorippa to me. Barbarea has an upright habit and ususally flowers early in the spring (at least in the South). As you say we can't say on the basis of the fruits that are not ripe, but Barbarea has very straight pods (unlike what we see on hte picture). Have you pressed a specimen to run it through a key again?
Best Wishes

Hatted_Botanist's picture

Agree it's Rorippa

Thanks for the help.
I have gone back and sat in the rain and confirmed clearly Rorippa

Ambroise's picture

Thanks for keeping us posted

Thanks for keeping us posted