Cress Rocket

Names and Synonyms

Common Names

• Cress Rocket
• Ward's-weed
• Ward's Weed

Scientific Names

Accepted name

Synonyms

• Vella annua

Regional and Traditional Names

Sources: Wikidata, Catalogue of Life

Taxonomical Classification

This plant belongs to the kingdom Plantae and is classified under the phylum Streptophyta and class Equisetopsida. Within the subclass Magnoliidae, it is organized under the order Brassicales and the family Brassicaceae. Its specific taxonomic identity is defined by the genus Carrichtera, which includes the species Carrichtera annua.

Sources: The World Checklist of Vascular Plants (WCVP)

Distribution

This plant exhibits a diverse distribution across several regions of the European continent. In Middle Europe, its presence is specifically noted within Germany. Moving toward the Mediterranean, it is found throughout various parts of Southwestern Europe. This includes occurrences on the islands of Baleares, Corse, and Sardegna. Finally, its range extends to the coastal areas of Portugal.

Sources: The World Checklist of Vascular Plants (WCVP)

Botanical Identification

Ecology

The ecology of Carrichtera annua is characterized by its preference for lowland environments, where it thrives within specific altitudinal parameters. This species is typically found at relatively low elevations, occupying a niche that begins as low as 10 m AMSL and extends up to a maximum elevation of 800 m AMSL. These environmental constraints suggest that the plant is adapted to the warmer, more humid conditions often associated with lowland ecosystems.

Elevational range max:

800 m AMSL

Elevational range min:

10 m AMSL

Habitat :

Lowland

Life history

The life history of Carrichtera annua is characterized by an annual lifecycle, meaning it completes its entire developmental process from germination to seed production within a single growing season. In terms of its biological structure and survival strategy, the plant is classified as a therophyte, a life form where the plant survives unfavorable periods in the form of seeds, rapidly growing to maturity once conditions become favorable. This classification as a therophyte applies to both its primary life form designation and its functional ecological role, ensuring its presence in its habitat through a quick, seasonal reproductive cycle.

Life form :

therophyte

Lifecycle :

annual

Morphology

The morphology of Carrichtera annua is characterized by its growth form as a non-woody herb, specifically categorized as a forb. This plant is a terrestrial species that functions independently, neither acting as a parasite nor as an epiphyte. In terms of its structural habit, it is a self-supporting plant rather than a liana or vine. The physical stature of the species is relatively small, with a plant height that typically ranges from a minimum of 0.05 m to a maximum of 0.4 m, maintaining an average height of approximately 0.2 m.

Aquatic :

terrestrial

Climber :

self-supporting

Epiphyte :

terrestrial

Growth form :

herb

Parasite :

independent

Plant height max:

0.4 m

Plant height mean:

0.2 m

Plant height min:

0.05 m

Woodiness :

non-woody

Physiology

The physiological structure of the foliage in Carrichtera annua is characterized by a distinct linear leaf form, which optimizes its surface area for light absorption and gas exchange. The dimensions of these leaves vary significantly across the plant, with leaf lengths ranging from a minimum of 2 cm to a maximum of 6 cm. Complementing this longitudinal growth, the leaf width fluctuates between a minimum of 1 cm and a maximum of 3 cm, providing a structural framework that supports its metabolic functions and overall vegetative development.

Leaf form :

linear

Leaf length max:

6 cm

Leaf length min:

2 cm

Leaf width max:

3 cm

Leaf width min:

1 cm

Reproduction

The reproduction of Carrichtera annua is characterized by a flowering period that typically begins in February and extends through July. During this reproductive phase, the plant produces violet-colored flowers that measure between 0.7 cm and 0.9 cm in length. Following pollination, the plant develops dry, pod-type fruits which possess an average length of 0.7 cm and an average width of 0.4 cm. These fruits are dehiscence-type, meaning they split open at maturity to release the seeds. The seeds are notably small and lightweight, with a mean mass of 0.000894 g, ranging from a minimum of 0.0006 g to a maximum of 0.00131 g. Dispersal of the seeds is achieved through a hydrochorous syndrome, utilizing water as the primary medium for spreading the progeny.

Dehiscence :

dehiscent

Dispersal syndrome :

hydrochorous

Flower colour :

violet

Flower length max:

0.9 cm

Flower length min:

0.7 cm

Flowering time :

Feb

Flowering time :

Jul

Fruit dryness :

dry

Fruit length mean:

0.7 cm

Fruit type :

pod

Fruit width mean:

0.4 cm

Seed mass max:

0.00131 g

Seed mass mean:

0.000894 g

Seed mass min:

6e-04 g

Sources: Global Inventory of Floras and Traits (GIFT)

Chemicals

Carrichtera annua has 2 reported phytochemicals identified across 0 scientific publications and several other databases. The most consistently reported chemicals include Gallic acid, quercetin.

Gallic acid

1. Scientific reports

quercetin

1. Journal of natural products

Preparations

Carrichtera annua has 2 reported preparations identified across 0 scientific publications and several other databases. The most consistently reported preparations include ethanol crude extracts, whole plants.

Ethanol crude extracts

1. Scientific reports

Whole plants

1. Journal of natural products