SafePlants

Eriocaulon compressum: Flattened Pipewort

Eriocaulon compressum, commonly known as Flattened Pipewort, is a fascinating aquatic plant belonging to the pipewort family.

Considerations for Pets and Children

• One source indicates a "No" rating regarding safety for children, dogs, and cats, but further research is needed for definitive information.

Nomenclature and Taxonomy

• Scientific Name: Eriocaulon compressum Lam.
• Common Names: Flattened Pipewort, Hatpin
• Family: Eriocaulaceae (Pipewort Family)
• Kingdom: Plantae
• Taxonomic Rank: Variety

Distribution and Habitat

• Eriocaulon compressum is found nearly throughout Florida.
• It thrives in wet environments such as wet flatwoods, bogs, and marshes.
• It is considered state rare in Maryland.
• It can be found in locations such as Alabama and Delaware.

Morphological Characteristics

• Flattened Pipewort is described as a forb/herb, meaning it is a non-woody plant that is not a grass.
• The plant has visible air spaces.
• It exhibits showy, compact, flattened heads, at the tips of inflorescences.
• Flower color is white.
• Flower arrangement is a head.
• Leaf type is simple.
• The flower heads typically grow to one to two feet tall.
• The main leaf part of the plant is small, about 4-6 inches across.

Ecology and Interactions

• Pipeworts can be confused with bog button (Lachnocaulon).
• Flattened pipewort may co-exist with plants such as savannah meadowbeauty (Rhexia alifanus) and longleaf threeawn (Aristida palustris).

Resources and Further Information

• USDA-NRCS PLANTS Database
• Discover Life
• Dave's Garden
• IRMNG (Interim Register of Marine and Nonmarine Genera)
• EOL (Encyclopedia of Life)
• Garden Guides