Golden Crownbeard

Names and Synonyms

Common Names

• Golden Crownbeard
• American dogweed
• South African daisy
• butter daisy
• crown-beard
• golden crown-beard
• wild sunflower
• Township Daisy
• cowpen daisy

Scientific Names

Accepted name

Synonyms

• Verbesina encelioides var. cana
• Verbesina australis
• Verbesina encelioides subsp. exauriculata
• Verbesina encelioides var. exauriculata
• Verbesina exauriculata
• Verbesina scabra
• Ximenesia australis
• Ximenesia encelioides
• Ximenesia exauriculata
• Ximenesia encelioides var. exauriculata
• Verbesina encelioides var. exauriculata
• Ximenesia encelioides var. pachyptera
• Ximenesia microptera
• Encelia albescens
• Pallasia serratifolia

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 the class Equisetopsida. Within the subclass Magnoliidae, it is positioned in the order Asterales and the family Asteraceae. Finally, its taxonomic identity is defined by the genus Verbesina, specifically the species Verbesina encelioides.

Sources: The World Checklist of Vascular Plants (WCVP)

Distribution

This plant exhibits a specific distribution across various parts of the European continent. In Northern Europe, it can be found growing in Denmark, Great Britain, Norway, and Sweden. Additionally, its range extends into Middle Europe, where it is located in Belgium. These various regions highlight the plant's presence in both Scandinavian and central territories. Consequently, its habitat spans several distinct climatic zones within the northern and central regions.

Sources: The World Checklist of Vascular Plants (WCVP)

Botanical Identification

Ecology

The ecology of Verbesina encelioides is characterized by its broad adaptability across varying altitudinal gradients, allowing it to occupy diverse topographical niches. This species is found across a wide elevational spectrum, ranging from sea level up to a maximum altitude of 2500 m AMSL. On average, the plant thrives at a mean elevation of approximately 1000 m AMSL, suggesting a preference for mid-altitude environments while maintaining the physiological plasticity required to colonize both lowland coastal regions and higher montane zones.

Elevational range max:

2500 m AMSL

Elevational range mean:

1000 m AMSL

Elevational range min:

0 m AMSL

Genetics

The genetics of Verbesina encelioides are characterized by a specific chromosomal constitution that defines its cytogenetic profile. Within its cellular structure, the species possesses a diploid chromosome number of 34. This numerical value serves as a fundamental genetic marker for the plant, reflecting the evolutionary lineage and genomic stability inherent to this particular medicinal taxon. Such chromosomal data is critical for understanding the reproductive biology and inheritance patterns that govern the plant's physiological and medicinal properties.

Chromosome number :

34

Life history

The life history of Verbesina encelioides is characterized by an annual lifecycle, meaning the plant completes its entire developmental process—from germination to seed production—within a single growing season. In terms of its structural life form, it is classified as a therophyte, a strategy where the plant survives unfavorable conditions as a seed, only emerging and developing its vegetative structure when environmental conditions become suitable for growth. This lifecycle allows the species to rapidly exploit seasonal resources, ensuring the dispersal of its progeny before the onset of environmental stress or seasonal changes.

Life form :

therophyte

Lifecycle :

annual

Morphology

The morphology of Verbesina encelioides is characterized by its growth form as a non-woody herb, specifically categorized as a forb. This plant maintains a self-supporting structure rather than acting as a liana, vine, or obligatory climber, and it exhibits an erect shoot orientation. In terms of stature, it is a relatively small plant with a height ranging from a minimum of 0.2 m to a maximum of 1 m, maintaining an average height of approximately 0.61 m. It is a terrestrial species, functioning as an independent organism rather than a parasite or an epiphyte.

Aquatic :

terrestrial

Climber :

self-supporting

Epiphyte :

terrestrial

Growth form :

herb

Growth form :

forb

Parasite :

independent

Plant height max:

1 m

Plant height mean:

0.61 m

Plant height min:

0.2 m

Shoot orientation :

erect

Woodiness :

non-woody

Physiology

The physiology of Verbesina encelioides is characterized by a C3 photosynthetic pathway, which dictates its carbon fixation processes and environmental adaptations. The plant's vegetative structure features an alternate leaf arrangement, with individual leaves exhibiting an ovate form. These leaves vary in size, with a minimum length of 4 cm and a maximum length of 15 cm, while their width ranges from a minimum of 1 cm to a maximum of 10 cm.

Leaf arrangement :

alternate

Leaf form :

ovate

Leaf length max:

15 cm

Leaf length min:

4 cm

Leaf width max:

10 cm

Leaf width min:

1 cm

Photosynthetic pathway :

C3

Reproduction

The reproduction of Verbesina encelioides is characterized by a specific flowering phenology and distinct morphological structures. The flowering period typically begins in May and concludes in July, though the timing can be variable. During this season, the plant produces yellow flowers that range in length from 1 cm to 2 cm, with a width varying between 1.2 cm and 2 cm. Following pollination, the plant develops fruit in the form of an achene, which is characterized by an indehiscent nature. The resulting seeds are quite small, with a mean mass of approximately 0.00196 g, though individual seed weights can range from a minimum of 0.0014 g to a maximum of 0.00325 g.

Dehiscence :

indehiscent

Flower colour :

yellow

Flower length max:

2 cm

Flower length min:

1 cm

Flower width max:

2 cm

Flower width min:

1.2 cm

Flowering time :

May

Flowering time :

Jul

Fruit type :

achene

Seed mass max:

0.00325 g

Seed mass mean:

0.00196145466666667 g

Seed mass min:

0.0014 g

Sources: Global Inventory of Floras and Traits (GIFT)

Chemicals

Verbesina encelioides has 5 reported phytochemicals identified across 0 scientific publications and several other databases. The most consistently reported chemicals include CATALASE, LEAD, Peroxidase, chlorophyll a, proline.

CATALASE

1. Biodegradation

LEAD

1. Biodegradation

Peroxidase

1. Biodegradation

chlorophyll a

1. Biodegradation

proline

1. Biodegradation