Ptilimnium capillaceum

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]

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)[1]
General range of Ptilimnium capillaceum
Synonyms[1]
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)

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 States' 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]