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Amaranthus cannabinus (Linnaeus) J.D. Sauer. Common name: Salt-marsh Water-hemp. Phenology: Jul-Dec. Habitat: Salt, brackish, and freshwater tidal marshes, especially along the banks of tidal guts. Distribution: ME south to ne. FL (Duval County).

ID notes: Extremely variable in size, flowering and fruiting at heights ranging from 3 dm to 4 m tall. The stem can reach 10 cm in diameter at the base.

Origin/Endemic status: Native

Synonymy ⓘ: = C, FNA4, GW2, K4, NE, NY, Pa, RAB, Va, WH3, Sauer (1955); = Acnida cannabina L. — F, G, S, S13, Tat. Basionym: Acnida cannabina L. 1753

Links to other floras: = Amaranthus cannabinus - FNA4

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Wetland Indicator Status:

  • Atlantic and Gulf Coastal Plain: OBL
  • Eastern Mountains and Piedmont: OBL
  • Northcentral & Northeast: OBL

Heliophily ⓘ: 8

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image of plant© Gary P. Fleming | Original Image ⭷
image of plant© Gary P. Fleming | Original Image ⭷
image of plant© Gary P. Fleming | Original Image ⭷
image of plant© Bruce A. Sorrie | Original Image ⭷
image of plant© Bruce A. Sorrie | Original Image ⭷

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Horticultural Information

NCBG trait

Intro: Erect to reclining, fleshy annual found in salt, brackish, and freshwater tidal marshes, especially along the banks of tidal "guts."

Stems: Stems stout, branched, reddish below, ridged and smooth.

Leaves: Leaves alternate, petiolate, narrowly lance-shaped to linear, 2-6 in. long, smooth.

Inforescence:

Flowers: Flowers in narrow spikes at top of stem and from upper leaf axils, green, 1/8 in. long, with 3 tiny bracts surrounding each flower; male and female flowers separate.

Fruits: Fruit a seed surrounded by a dark reddish-brown, wrinkled membrane.

Comments:

Height: 2-7 ft.

plant sale text:

bloom table text:

description: Erect to reclining, fleshy annual found in salt, brackish, and freshwater tidal marshes, especially along the banks of tidal "guts."

stems: Stems stout, branched, reddish below, ridged and smooth.

leaves: Leaves alternate, petiolate, narrowly lance-shaped to linear, 2-6 in. long, smooth.

inflorescence:

flowers: Flowers in narrow spikes at top of stem and from upper leaf axils, green, 1/8 in. long, with 3 tiny bracts surrounding each flower; male and female flowers separate.

fruits: Fruit a seed surrounded by a dark reddish-brown, wrinkled membrane.

comments:

cultural notes:

germination code:

native range:



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