PERENNIAL WALL-ROCKET

WALL-ROCKET

Diplotaxis tenuifolia

Cabbage Family [Brassicaceae]

month8may month8jun month8june month8jul month8july month8aug month8sep month8sept

status
statusZarchaeophyte
flower
flower8yellow
inner
inner8cream
morph
morph8actino
petals
petalsZ4
stem
stem8round

19th July 2007, Barrow-in-Furness, Cumbria. Photo: © RWD
More robust and at up to 80cm slightly taller than (Annual Wall-Rocket) which only reaches to 60cm.


19th July 2007, Barrow-in-Furness, Cumbria. Photo: © RWD
Unlike (Annual Wall-Rocket) the lower part of the stems are woody, there is no basal rosette - all the leaves are stem leaves which are bushy around the base, whilst and upper stem leaves are finer.


19th July 2007, Barrow-in-Furness, Cumbria. Photo: © RWD
Flowers are paler yellow than those of (Annual Wall-Rocket).


19th July 2007, Barrow-in-Furness, Cumbria. Photo: © RWD
The flowering stems are greyer than (Annual Wall-Rocket).


19th July 2007, Barrow-in-Furness, Cumbria. Photo: © RWD
At between 15-30mm across the flowers are larger than those on (Annual Wall-Rocket) which are only 10-15mm across.


19th July 2007, Barrow-in-Furness, Cumbria. Photo: © RWD
The petals are much the same shape, slightly longer than broad, but have irregularities along the furthest edge.


19th July 2007, Barrow-in-Furness, Cumbria. Photo: © RWD
Style elongating into seed pod.


19th July 2007, Barrow-in-Furness, Cumbria. Photo: © RWD
The fine upper stem leaves, branched into several pinnate leaves. Unlike Annual Wall-Rocket, which has a basal rosette of leaves, Perennial Wall-rocket lacks a basal rosette.


19th July 2007, Barrow-in-Furness, Cumbria. Photo: © RWD
Upper stem leaves.


19th July 2007, Barrow-in-Furness, Cumbria. Photo: © RWD
Upper stem leaves.


19th July 2007, Barrow-in-Furness, Cumbria. Photo: © RWD
Lower stem leaves are longer and wider, but still pinnate. Unlike (Annual Wall-Rocket) there are no basal leaves, just stem leaves most of which form a bush around the base. The leaves are >3 times longer than the width (< 3 times longer than wide on Annual Wall-Rocket)


19th July 2007, Barrow-in-Furness, Cumbria. Photo: © RWD
Stem purplish near the woody base. Leaves also have a purplish midrib.


19th July 2007, Barrow-in-Furness, Cumbria. Photo: © RWD
Pods similar to those of (Annual Wall-Rocket) with 2 rows of seeds within.


19th July 2007, Barrow-in-Furness, Cumbria. Photo: © RWD
The pods still have remnants of the style attached at the top. In Perennial Wall-rocket the pods start after a small gap above the remnants of the sepals, best seen in the top right-hand fruit (unlike Annual Wall-Rocket where the pods start without any such gap).


Some similarities to : Annual Wall-Rocket (Diplotaxis muralis), see captions for differences. Also, Annual Wall-Rocket stinks when crushed, whereas Perennial wall-rocket apparently doesn't.

Many similarities to : Isle of Man Cabbage (Coincya monensis) but the leaves on that are are shiny and the seed pods have a long narrow conical section atop and there exists a basal rosette of leaves at the foot.

Uniquely identifiable characteristics

Distinguishing Features : see captions

No relation to : Wall-rue (Asplenium ruta-muraria) [a fern with both similar common and scientific names].

A perennial and archaeophyte which is found on walls, bare and waste ground and railway cuttings. Now grown commercially as a salad plant (Wild Rocket).


  Diplotaxis tenuifolia  ⇐ Global Aspect ⇒ Brassicaceae  

Distribution
 family8Cabbage family8Brassicaceae

 BSBI maps
genus8Diplotaxis
Diplotaxis
(Wall-Rockets)

PERENNIAL WALL-ROCKET

WALL-ROCKET

Diplotaxis tenuifolia

Cabbage Family [Brassicaceae]