Ptilimnium capillaceum

Herbwilliam
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Eudicots
Clade:	Asterids
Order:	Apiales
Family:	Apiaceae
Genus:	Ptilimnium
Species:	P. capillaceum
Binomial name
	Ptilimnium capillaceum; (Michx.) Raf. (1830)
	General range of Ptilimnium capillaceum
Synonyms
	Ammi capillaceum Michx. (1803) ; Discopleura capillacea (Michx.) DC. (1829) ; Sison capillaceum (Michx.) Spreng. (1824) ; Ammi majus Walter (1788) ; Ammi rubricaule Hornem. (1813) ; Discopleura juncea (Raf.) Steud. (1840) ; Discopleura major Britton, Sterns & Poggenb. (1888) ; Ptilimnium junceum Raf. (1830) ; Sison rubricaule (Hornem.) Eaton & Wright (1840) ;

Ptilimnium capillaceum, known by the common name of herbwilliam, is a member of the carrot family, Apiaceae. It is a perennial herb, native to the eastern United States, from Texas to Massachusetts.^[2]

Description

P. capillaceum range between 1 and 8 decimeters (approximately 4 and 31 inches) in height. Leaves are pinnate.^[3]

Distribution and Habitat

This species' range encompasses eastern and central United States, stretching westward to Texas and south to Florida's Miami-Dade and Collier counties.^[4]

Within the United State's southeastern coastal plain, P. capillaceum occurs in wiregrass and slashpine habitats, flatwoods, and hammocks of various types. It grows in both shady and full sun location. Soil preferences range, including loamy sand, peaty soil, and clay.^[5]

References

^ ^a ^b "Ptilimnium capillaceum (Michx.) Raf.", Plants of the World Online, Royal Botanic Gardens, Kew, retrieved 23 December 2022
^ "Ptilimnium capillaceum". Global Biodiversity Information Facility. Retrieved 23 December 2022.
^ Radford, Albert E., Harry E. Ahles, and C. Ritchie Bell. Manual of the Vascular Flora of the Carolinas. 1964, 1968. The University of North Carolina Press. 784. Print.
^ "IRC - Natives for Your Neighborhood". regionalconservation.org. Retrieved 2025-08-05.
^ Florida State University Robert K. Godfrey Herbarium database. URL: http://herbarium.bio.fsu.edu. Last accessed: November 2015. Collectors: William P. Adams, Loran C. Anderson, Kurt E. Blum, Dave Breil, Sidney T. Brinson, G. Fleming, P. Genelle,, C.S. Gidden, R.K. Godfrey, Darren Jackson, D.E. Kennemore Jr., G. Knight, Mabel Kral, R. Kral, Robert J. Lamaire, S.W. Leonard, Sidney McDaniel, William Lindsey,W. Miley, Marc Minno, Richard Mitchell, John B. Nelson, Elmer C. Prichard, Ronald A. Pursell, Gwynn W. Ramsey, P.L. Redfearn Jr., A. Redman, Grady W. Reinert, V. Rosario, Cecil R. Slaughter, Bian Tan, D.B. Ward, S.S. Ward, Jean W. Wooten. States and Counties: Florida: Alachua, Bradford, Brevard, Calhoun, Charlotte, Citrus, Columbia, DeSoto, Dixie, Escambia, Franklin, Hamilton, Hernando, Jackson, Jefferson, Lafayette, Leon, Liberty, Madison, Nassau, Okaloosa, Orange, Polk, Putnam, St. Johns, Sumter, Suwannee, Taylor, Union, Volusia, Wakulla. Georgia: Thomas.

External links

Media related to Ptilimnium capillaceum at Wikimedia Commons
Data related to Ptilimnium capillaceum at Wikispecies

[POWO_60456499-2-1] "Ptilimnium capillaceum (Michx.) Raf.", Plants of the World Online, Royal Botanic Gardens, Kew, retrieved 23 December 2022

[2] "Ptilimnium capillaceum". Global Biodiversity Information Facility. Retrieved 23 December 2022.

[3] Radford, Albert E., Harry E. Ahles, and C. Ritchie Bell. Manual of the Vascular Flora of the Carolinas. 1964, 1968. The University of North Carolina Press. 784. Print.

[4] "IRC - Natives for Your Neighborhood". regionalconservation.org. Retrieved 2025-08-05.

[5] Florida State University Robert K. Godfrey Herbarium database. URL: http://herbarium.bio.fsu.edu. Last accessed: November 2015. Collectors: William P. Adams, Loran C. Anderson, Kurt E. Blum, Dave Breil, Sidney T. Brinson, G. Fleming, P. Genelle,, C.S. Gidden, R.K. Godfrey, Darren Jackson, D.E. Kennemore Jr., G. Knight, Mabel Kral, R. Kral, Robert J. Lamaire, S.W. Leonard, Sidney McDaniel, William Lindsey,W. Miley, Marc Minno, Richard Mitchell, John B. Nelson, Elmer C. Prichard, Ronald A. Pursell, Gwynn W. Ramsey, P.L. Redfearn Jr., A. Redman, Grady W. Reinert, V. Rosario, Cecil R. Slaughter, Bian Tan, D.B. Ward, S.S. Ward, Jean W. Wooten. States and Counties: Florida: Alachua, Bradford, Brevard, Calhoun, Charlotte, Citrus, Columbia, DeSoto, Dixie, Escambia, Franklin, Hamilton, Hernando, Jackson, Jefferson, Lafayette, Leon, Liberty, Madison, Nassau, Okaloosa, Orange, Polk, Putnam, St. Johns, Sumter, Suwannee, Taylor, Union, Volusia, Wakulla. Georgia: Thomas.

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