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Eriocaulon compressum (Flattened pipewort)
Cressler, Alan

Eriocaulon compressum

Eriocaulon compressum Lam.

Flattened Pipewort, Hat Pins

Eriocaulaceae (Pipewort Family)

Synonym(s): Eriocaulon compressum var. harperi

USDA Symbol: ERCO7

USDA Native Status: L48 (N)

The small, compact, pubescent-white, button-like, flowering head is solitary at the end of a leafless scape. The flower stalk, up to 2 ft. tall, rises from a cluster of usually submerged, sheathed, linear, basal leaves. The dried heads remain white.


From the Image Gallery

3 photo(s) available in the Image Gallery

Plant Characteristics

Duration: Perennial
Habit: Herb
Fruit Type: Capsule
Size Notes: Up to about 28 inches tall.

Bloom Information

Bloom Color: White
Bloom Time: Feb , Mar , Apr , May , Jun , Jul


USA: AL , DC , DE , FL , GA , LA , MD , MS , NC , NJ , SC , TX , VA
Native Distribution: Coastal areas from NJ to FL & TX
Native Habitat: Wet soil or shallow water of roadside ditches, glades or flat woods

Growing Conditions

Light Requirement: Part Shade
Soil Moisture: Wet
Soil Description: Wet soils or shallow water.


Commercially Avail: yes

National Wetland Indicator Status

This information is derived from the U.S. Army Corps of Engineers National Wetland Plant List, Version 3.1 (Lichvar, R.W. 2013. The National Wetland Plant List: 2013 wetland ratings. Phytoneuron 2013-49: 1-241). Click here for map of regions.

From the National Organizations Directory

According to the species list provided by Affiliate Organizations, this plant is on display at the following locations:

Crosby Arboretum - Picayune, MS
Mt. Cuba Center - Hockessin, DE

Web Reference

Webref 38 - Flora of North America (2019) Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.
Webref 23 - Southwest Environmental Information Network (2009) SEINet - Arizona Chapter

Additional resources

USDA: Find Eriocaulon compressum in USDA Plants
FNA: Find Eriocaulon compressum in the Flora of North America (if available)
Google: Search Google for Eriocaulon compressum


Record Modified: 2023-02-08
Research By: TWC Staff

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