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coastal flatsedge
Scientific Name: Cyperus pennatiformis
Family: Cyperaceae
Category: Monocot
Growth: Graminoid
Duration: Perennial
Other Names:
Coastal Flatsedge (Cyperus pennatiformis)
The Coastal Flatsedge, scientifically known as Cyperus pennatiformis, is a rare species of sedge endemic to Hawaii. It is also known by several other common names including taperleaf flatsedge, taper-tip flat sedge, and tapertip flatsedge.
Considerations for Pets
- According to some sources, Coastal Flatsedge is considered unsafe for both dogs and cats.
Taxonomy and Nomenclature
- Scientific Name: Cyperus pennatiformis Kk.
- Family: Cyperaceae
- Group: Monocot
- Synonyms: Formerly known as Mariscus pennatiformis.
- Varieties:
- Cyperus pennatiformis var. bryanii Kk. (Bryan's flatsedge)
- Cyperus pennatiformis var. pennatiformis
- Related Species:
- Cyperus parishii (Parish's Flatsedge)
- Cyperus phaeolepis (Madagascar Flatsedge)
- Cyperus cuspidatus Kunth (Coastal Plain Flatsedge)
- Cyperus grayi (Gray's flatsedge)
- Cyperus flavicomus (White-edge flatsedge)
- Cyperus odoratus (Fragrant flatsedge)
Distribution and Habitat
- Endemic to Hawaii.
- Primarily found in undisturbed remnant patches of coastal prairie.
- Other flatsedge species are found along the coasts of the USA, including the Atlantic and Pacific coasts.
- Saltmarsh flat-sedge can be found on rocky shores of Northern Ireland.
Morphological Characteristics and Growth Habits
- Graminoid plant type.
- Perennial plant.
- Robust root system.
Quirky Facts
- While mostly known from Suffolk County, there were two collections of this rare flatsedge from Queens County in the 1890s.
Further Information
- Encyclopedia of Life
- Discover Life
- Plants of Hawaii (Forest and Kim Starr)