Hymenidium davidii

Names and Synonyms

Scientific Names

Accepted name

Synonyms

• Pleurospermum pilgerianum
• Pleurospermum longipetiolatum
• Pleurospermum tanacetifolium
• Pleurospermum grandifolium
• Pleurospermum franchetianum
• Pleurospermum davidii
• Pleurospermum rockii

Sources: Wikidata

Taxonomical Classification

This plant belongs to the kingdom Plantae and the phylum Streptophyta. Within the class Equisetopsida and subclass Magnoliidae, it is categorized under the order Apiales and the family Apiaceae. Specifically, it is classified under the genus Hymeniidum.

Sources: The World Checklist of Vascular Plants (WCVP)

Distribution

This plant exhibits a broad distribution across several distinct regions within Asia. In China, its presence is documented in the South-Central areas as well as the North-Central territories. It can also be found in the northern reaches of the country within Inner Mongolia. Additionally, its habitat extends to the high-altitude landscapes of Qinghai. Beyond China, the species is also distributed within the Indian Subcontinent, specifically in Nepal.

Sources: The World Checklist of Vascular Plants (WCVP)

Botanical Identification

Ecology

The ecology of Hymeniidum davidii is characterized by its distribution within high-altitude environments, where it thrives across a significant vertical gradient. This species is typically found in montane and subalpine zones, occupying an elevational range that begins at a minimum of 2500 m AMSL. Throughout its habitat, the plant maintains a mean elevation of approximately 3400 m AMSL, reflecting its adaptation to the cooler temperatures and specific climatic conditions of mid-to-high mountain ecosystems. Its ecological niche extends to extreme heights, reaching a maximum elevational range of 4900 m AMSL, which places it in proximity to alpine or even subnival zones where environmental stressors are most pronounced.

Elevational range max:

4900 m AMSL

Elevational range mean:

3400 m AMSL

Elevational range min:

2500 m AMSL

Life history

The life history of Hymeniidium davidii is characterized by a biennial lifecycle, meaning the organism typically completes its developmental stages over a period of two years. During its initial phase, the plant undergoes a period of vegetative growth, establishing its structural foundation and accumulating necessary resources. In the subsequent stage of its lifecycle, it transitions toward reproductive maturity, focusing its energy on the production of reproductive structures to ensure the continuation of the species. This two-year cycle governs its seasonal rhythms and dictates the timing of its physiological transitions within its specific ecological niche.

Lifecycle :

biennial

Morphology

The morphology of Hymeniidion davidii is characterized by its non-woody structure and a self-supporting growth habit, meaning it does not rely on external structures for climbing. In terms of stature, the plant exhibits a relatively low profile, with its height typically ranging from a minimum of 0.4 m to a maximum of 0.7 m, maintaining an average plant height of approximately 0.55 m.

Climber :

self-supporting

Plant height max:

0.7 m

Plant height mean:

0.55 m

Plant height min:

0.4 m

Woodiness :

non-woody

Reproduction

Reproduction in Hymeniidium davidii is characterized by the development of distinct fruit structures that exhibit specific dimensional variations. The morphological assessment of these fruits reveals a relatively consistent size range, with the fruit length measuring a minimum of 0.4 cm and reaching a maximum of 0.5 cm. Across observed samples, the fruit length maintains a mean value of 0.45 cm, indicating a highly standardized reproductive output in terms of fruit dimensions.

Fruit length max:

0.5 cm

Fruit length mean:

0.45 cm

Fruit length min:

0.4 cm

Sources: Global Inventory of Floras and Traits (GIFT)

Chemicals

Hymenidium davidii has 4 reported phytochemicals identified across 0 scientific publications and several other databases. The most consistently reported chemicals include BETA-SITOSTEROL, Daucosterol, alpha-Spinasterol 3-O-beta-D-glucopyranoside, octadecyl caprate.

BETA-SITOSTEROL

1. Journal of Asian natural products research

Daucosterol

1. Journal of Asian natural products research

alpha-Spinasterol 3-O-beta-D-glucopyranoside

1. Journal of Asian natural products research

octadecyl caprate

1. Journal of Asian natural products research