Small Flower Umbrella Sedge

Names and Synonyms

Common Names

• Variable Flat-sedge
• Smallflower Umbrella Sedge
• dirty-Dora
• rice sedge
• small-flower umbrella-plant
• variable flat sedge
• Dirty Dora
• Smallflower Umbrella Plant

Scientific Names

Accepted name

Synonyms

• Cyperus subrotundus
• Cyperus oryzetorum
• Cyperus difformis var. breviglobosus
• Cyperus difformis f. humilis
• Cyperus difformis f. maximus
• Cyperus difformis var. subdecompositus
• Cyperus goeringii
• Cyperus holoschoenoides

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 Poales, it is classified under the family Cyperaceae and the genus Cyperus. Specifically, Cyperus difformis represents a unique medicinal species within this taxonomic hierarchy.

Sources: The World Checklist of Vascular Plants (WCVP)

Distribution

This plant exhibits a specific distribution across several regions of the European continent. In Middle Europe, its presence is documented in both Germany and Hungary. Moving toward the southwestern part of the continent, it can be found in France and Portugal. Additionally, the species extends to the island of Corse within the southwestern European territory. Together, these locations define the known geographical range of Cyperus difformis.

Sources: The World Checklist of Vascular Plants (WCVP)

Botanical Identification

Ecology

The ecology of Cyperus difformis is characterized by its adaptability to diverse moisture-rich environments, primarily thriving within swamps and occasionally appearing in disturbed areas such as crop fields. Its distribution across different altitudes is broad, spanning an elevational range that begins at sea level (0 m AMSL) and extends up to a maximum of 2500 m AMSL. While the mean elevation for the species is recorded at 0 m AMSL, its ability to occupy various topographical niches allows it to persist in both lowland wetland ecosystems and higher-altitude moisture-retaining habitats.

Elevational range max:

2500 m AMSL

Elevational range mean:

0 m AMSL

Habitat :

crop fields, swamps

Genetics

The genetics of Cyperus difformis are characterized by a notable level of chromosomal variation, which is indicative of the complex evolutionary processes often found within the Cyperaceae family. Specifically, the cytogenetic profile of this species demonstrates significant aneuploidy or polyploidy tendencies, as evidenced by the varying chromosome numbers recorded at 26, 34, and 36. This fluctuation in the diploid or polyploid sets suggests a high degree of genetic plasticity, which may contribute to the plant's ability to adapt to diverse environmental niches. Such chromosomal diversity plays a crucial role in the genetic architecture of the species, potentially influencing its reproductive strategies and phenotypic stability across different populations.

Chromosome number :

26, 34, 36

Life history

The life history of Cyperus difformis is characterized by a specific developmental strategy defined by its seasonal and structural adaptations. This species functions as an annual, completing its entire life cycle within a single growing season from germination to seed production. In terms of its physical structure and ecological positioning, it exhibits a dual classification of life forms: it is categorized as a helophyte, meaning it grows in marshy or aquatic environments with parts emerging above the water surface, and it is simultaneously classified as a therophyte, indicating that it survives unfavorable seasons primarily in the form of seeds.

Life form :

helophyte

Life form :

therophyte

Lifecycle :

annual

Morphology

The morphology of Cyperus difformis is characterized by its growth form as a non-woody, graminoid herb. This plant is a self-supporting species that does not function as a climber or a parasite, maintaining an independent life cycle. It is a terrestrial plant, lacking aquatic or epiphytic tendencies. In terms of stature, the plant exhibits a variable height ranging from a minimum of 0 m to a maximum of 1.2 m, with an average plant height of approximately 0.5 m.

Aquatic :

terrestrial

Climber :

self-supporting

Epiphyte :

terrestrial

Growth form :

herb

Growth form :

graminoid

Parasite :

independent

Plant height max:

1.2 m

Plant height mean:

0.5 m

Plant height min:

0 m

Woodiness :

non-woody

Physiology

The physiology of Cyperus difformis is characterized by a C3 photosynthetic pathway, which dictates its carbon fixation processes and metabolic efficiency in its typical environment. Morphologically, its vegetative structure features highly specialized, narrow leaves that exhibit a leaf width ranging from a minimum of 0.2 cm to a maximum of 0.6 cm, reflecting an adaptation to its specific ecological niche.

Leaf width max:

0.6 cm

Leaf width min:

0.2 cm

Photosynthetic pathway :

C3

Reproduction

The reproduction of Cypterus difformis is characterized by a bisexual sexual reproduction system that relies on abiotic pollination, specifically through a wind-driven pollination syndrome. The flowering period for this species is concentrated in August, marking both the start and the end of its blooming cycle. Following successful pollination, the plant produces dry, indehiscent fruits classified as achenes. These fruits contain a significant number of seeds, typically ranging from 101 to 1,000 seeds per fruit. The individual seeds are quite small, possessing a mean seed mass of $6.125 \times 10^{-5}$ g (with a range between $1 \times 10^{-5}$ g and $0.00019$ g) and a consistent seed volume of $0.14 \text{ mm}^3$. Self-fertilization is notably absent in this species. For the spread of its offspring, Cypterus difformis utilizes a hydrochorous dispersal syndrome, meaning the seeds are primarily dispersed by water.

Dehiscence :

indehiscent

Dispersal syndrome :

hydrochorous

Flowering time :

Aug

Fruit dryness :

dry

Fruit type :

achene

Pollination syndrome :

wind

Pollination syndrome :

abiotic

Reproduction sexual :

bisexual

Seed mass max:

0.00019 g

Seed mass mean:

6.125e-05 g

Seed mass min:

1e-05 g

Seed volume max:

0.14 mm³

Seeds_per_fruit :

101-1000

Self fertilization :

absent

Sources: Global Inventory of Floras and Traits (GIFT)

Chemicals

Cyperus difformis has 1 reported phytochemicals identified across 0 scientific publications and several other databases. The most consistently reported chemicals include As.

As

1. Environmental monitoring and assessment