giant St. John's-wort

Names and Synonyms

Common Names

• giant St. John's-wort
• great St. John's-wort

Scientific Names

Accepted name

Synonyms

• Ascyrum sibiricum
• Ascyrum tetragonum

Regional and Traditional Names

Sources: Wikidata, Catalogue of Life

Taxonomical Classification

This plant belongs to the kingdom Plantae and the phylum Streptophyta, falling under the class Equisetopsida and subclass Magnoliidae. Within the order Malpighiales, it is classified under the family Hypericaceae. Ultimately, its taxonomic identity is defined by its placement within the genus Hypericum.

Sources: The World Checklist of Vascular Plants (WCVP)

Distribution

This plant exhibits a specific distribution pattern concentrated within the diverse landscapes of Siberia. It can be found growing across the mountainous terrain of the Altai region. Furthermore, its presence extends into the eastern territories of Buryatia. The species is also documented within the geographical boundaries of Chita. Finally, its range encompasses the vast areas of both the Irkutsk and Krasnoyarsk regions.

Sources: The World Checklist of Vascular Plants (WCVP)

Botanical Identification

Ecology

The ecology of Hypericum ascyrion is defined by its ability to colonize a diverse array of transitional environments and varied substrates. It thrives in disturbed or open landscapes, frequently appearing in burn clearings and along the margins of forests where sunlight penetration is increased. This species demonstrates significant adaptability to moisture gradients, occupying habitats ranging from dry meadows and sandy soils to much wetter environments such as riparian zones near rivers, lake shores, and marshy meadows. Additionally, it is commonly found integrated into shrubberies, indicating a preference for ecotones where different vegetation types meet.

Habitat :

burn clearings, forest edges, lakes, meadows, meadows: wet, rivers, sand, shores, shrubberies

Life history

The life history of Hypericum ascyrone is characterized by its status as a perennial species, allowing it to persist through multiple growing seasons and establish a stable presence within its habitat. As a perennial, the plant avoids the complete mortality associated with annuals or biennials after a single reproductive cycle, instead focusing on the development of robust root systems that support continuous growth and regeneration over several years. This long-term life cycle enables the plant to endure seasonal fluctuations and invest energy into both vegetative expansion and periodic flowering, contributing to its sustained presence in its native ecological niches.

Lifecycle :

perennial

Morphology

The morphology of Hypericum ascyrion is characterized by its growth form as a non-woody herb and forb, functioning as a self-supporting plant rather than a climber or liana. It is an independent species that lacks parasitic tendencies and is classified as a terrestrial plant, rather than being aquatic or epiphytic. In terms of stature, the plant exhibits a variable height, typically ranging from a minimum of 0.4 m to a maximum of 1.2 m, with a mean height of approximately 1.5 m.

Aquatic :

terrestrial

Climber :

self-supporting

Epiphyte :

terrestrial

Growth form :

herb

Growth form :

forb

Parasite :

independent

Plant height max:

1.2 m

Plant height mean:

1.5 m

Plant height min:

0.4 m

Woodiness :

non-woody

Reproduction

The reproduction of Hypericum ascyron is characterized by its sexual reproductive mode, specifically featuring bisexual flowers. The flowering period for this species is relatively concentrated, typically beginning in June and concluding in July. The resulting seeds are remarkably minute, with a recorded minimum and maximum seed mass of 0.00012 g, contributing to a calculated mean seed mass of approximately 0.000164 g.

Flowering time :

Jun

Flowering time :

Jul

Reproduction sexual :

bisexual

Seed mass max:

0.00012 g

Seed mass mean:

0.000164 g

Sources: Global Inventory of Floras and Traits (GIFT)

Chemicals

Hypericum ascyron has 1 reported phytochemicals identified across 0 scientific publications and several other databases. The most consistently reported chemicals include Friedelin.

Friedelin

1. Fitoterapia

Activities

Hypericum ascyron has 1 reported activities identified across 0 scientific publications and several other databases. The most consistently reported activities include Cytotoxic.

Cytotoxic

1. Phytochemistry

Conditions

Hypericum ascyron has 1 reported investigations on conditions identified across 0 scientific publications and several other databases. The most consistently reported conditions include HIV-1.

Hiv-1

1. Phytochemistry

Preparations

Hypericum ascyron has 1 reported preparations identified across 0 scientific publications and several other databases. The most consistently reported preparations include extract of Hypericum ascyron.

Extract of hypericum ascyron

1. Biomedical chromatography : BMC