Cyclospermum leptophyllum

Cyclospermum leptophyllum (also, Ciclospermum l.) is a species of plant in the family Apiaceae known by the common names marsh parsley,^[1] slender celery^[2] and fir-leaved celery;^[1] one source also mentions the name of wild cherry,^[3] although this may be a misspelling of "wild celery". This is a plant found worldwide at warm temperate to tropical latitudes and is considered a noxious weed in many areas. It is a taprooted branching herb reaching just over half a meter in height at maximum. It has threadlike green leaves a few centimeters long and small umbels of spherical flowers. Host plant for Eastern Black Swallowtail butterflies.

Cyclospermum leptophyllum
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Eudicots
Clade:	Asterids
Order:	Apiales
Family:	Apiaceae
Genus:	Cyclospermum
Species:	C. leptophyllum
Binomial name
Cyclospermum leptophyllum (Pers.) Sprague ex Britton & P. Wils.
Synonyms
Apium leptophyllum Apium tenuifolium Cyclospermum ammi

The 1889 book 'The Useful Native Plants of Australia’ records that a common name included "Wild Parsley" and that "It is worthy of note that this plant (in common with others of the genus) is sometimes acrid and injurious when grown in damp soils. It is, doubtless, capable of much improvement by careful cultivation. This plant is not endemic to Australia."^[4]