White brassicas with pronged seed pods

Shepherd's-purse Shepherd's Cress Perennial Candytuft Perennial Candytuft

What are they?

This page covers members of the brassica family that typically grow less than 50cm in height and have white flowers. They all share the same general appearance of four-petalled, white flowers that are followed by short seed pods that may be either flattened evenly in one plane, or have upturned edges, making them rather like little shovels. All have tips that are clearly pointed with eother one, two or three points, or spikey projections. For identification purposes, it is wise to wait until seed pods have started to develop, as this will help to narrow your search.

Where are they found?

This is a group of only loosely related plants, so there is much variation in the habitat choices, though most are plants of urban habitats and disturbed ground. However, the habitat can be a valuable aid to identification for some species, so be sure to check these details in the individual species notes below.

Identification

All these plants have rather distinctive seed pods and attention to the shape of these, together with leaf and flower details should help to identify the species.



Shepherd's-purse      Capsella bursa-pastoris

An ancient introduction of disturbed ground, widespread and often abundant in arable areas, gardens and other bare ground. Flowers more or less throughout the year. Readily identifiable by its basal rosette of sharply pinnate leaves and distinctive, heart-shaped seed pods.

Shepherd's-purse Shepherd's-purse Shepherd's-purse
Flowers
Basal leaves
Seed pod


Shepherd's Cress      Teesdalia nudicaulis

An annual of open, sandy soil being mostly confined to Breckland and the Suffolk Sandlings, with a few isolated records from sandy soil elsewhere. Flowers April to June. A tiny plant and thus rather easily overlooked. Once found, the assymetrical flowers with two lower petals larger than the upper two, the shovel-shaped seed pods and the neatly round-lobed leaves make a diagnostic combination.

Shepherd's Cress Shepherd's Cress Shepherd's Cress Shepherd's Cress
Habit
Flowers
Basal leaf
Seed pods


Perennial Candytuft      Iberis sempervirens

Introduced from southern Europe as a garden rockery plant and rarely escaping into the wider countryside on walls and dry banks. Flowers April to June. An evergreen, perennial species, more or less becoming a woody sub-shrub over time. Leaves are deep, emerald green and the whole plant becomes covered in brilliant white flowerheads in late spring.

Perennial Candytuft Perennial Candytuft Perennial Candytuft Perennial Candytuft
Habit
Flowers
Leaves
Seed pods


Small Candytuft      Iberis amara

Introduced from southern Europe as a garden annual and more recently a component of so-called 'wildflower mixes' that occasionally get scattered along roadsides and in other public places. Flowers July to September. A short-lived annual, differing from Evergreen Candytuft in its smaller, annual growth, more elongate heads of flowers, well-toothed leaves and more rounded seed pods.

Small Candytuft Small Candytuft Small Candytuft Small Candytuft
Habit
Flowers
Leaf
Seed pods