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Cyclospermum leptophyllum (Persoon) Sprague ex Britton & Wilson. Marsh-parsley. Phen: Apr-early Jun; Jun-Jul. Hab: Freshwater marshes, disturbed areas, roadside ditches. Dist: Widespread in se. North America, from NC and OK south into tropical America, the native distribution uncertain.

Origin/Endemic status: Native

Synonymy ⓘ: = Ar, Fl7, K1, K3, K4, Meso4.1, Mex, NcTx, Ok, Tn, Va, WH3, Ronse et al (2010); = Apium leptophyllum (Pers.) F.Muell. ex Benth. – Bah, C, G, GW2, Il, MC, RAB, Tx; = Ciclospermum leptophyllum (Pers.) Sprague ex Britton & Wilson – NY, orthographic variant; = n/a – F, Pa, Tat; ? Cyclospermum ammi (L.) Lag. – S

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Wetland Indicator Status:

  • Atlantic and Gulf Coastal Plain: FAC
  • Eastern Mountains and Piedmont: FAC
  • Great Plains: FAC
  • Midwest: FAC

Heliophily ⓘ: 8

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image of plant© Keith Bradley | Original Image ⭷
image of plant© Aidan Campos source | Original Image ⭷
image of plant© Keith Bradley | Original Image ⭷
image of plant© Aidan Campos source | Original Image ⭷
image of plant© Aidan Campos source | Original Image ⭷
image of plant© Radford, Ahles and Bell | Original Image ⭷

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Horticultural Information

NCBG trait

Intro: Erect to reclining annual of freshwater marshes and disturbed areas, such as roadside ditches. Probably native of tropical America, now widespread in se. North America.

Stems: Stems slender, branched, smooth.

Leaves: Leaves alternate, on petioles with sheathing bases, 1/2-3 1/2 in. long (reduced in size upward), finely divided (2-3 times pinnately compound) into many linear, almost needle-like segments, smooth.

Inforescence:

Flowers: Flowers in compound, terminal and axillary umbels containing 2-3 umbellets; umbellets 1/4-1/2 in. wide and composed of 5-15 tiny white, 5-petaled flowers.

Fruits: Fruit a joined pair of asymmetrically elliptic seeds that are flat to slightly concave on one side and convex and conspicuously 3-ribbed on the other.

Comments:

Height: 4-18 in.

plant sale text:

bloom table text:

description: Erect to reclining annual of freshwater marshes and disturbed areas, such as roadside ditches. Probably native of tropical America, now widespread in se. North America.

stems: Stems slender, branched, smooth.

leaves: Leaves alternate, on petioles with sheathing bases, 1/2-3 1/2 in. long (reduced in size upward), finely divided (2-3 times pinnately compound) into many linear, almost needle-like segments, smooth.

inflorescence:

flowers: Flowers in compound, terminal and axillary umbels containing 2-3 umbellets; umbellets 1/4-1/2 in. wide and composed of 5-15 tiny white, 5-petaled flowers.

fruits: Fruit a joined pair of asymmetrically elliptic seeds that are flat to slightly concave on one side and convex and conspicuously 3-ribbed on the other.

comments:

cultural notes:

germination code:

native range: