2024 Edition • Donate • Get the App • Cite this Page
X

Colors

Data mode

Account

Login
Sign up

Support FSUS...

We've finished our 2024 fundraiser. Many thanks to those who have given! It's not too late to support us (click here)...

Copy permalink to share

Sium suave Walter. Water-parsnip. Phen: Jun-Aug; Aug-Oct. Hab: Freshwater marshes, brackish marshes, swamp forests, in tidally or seasonally flooded hydrology. Dist: NL (Newfoundland) west to AK, south to Panhandle FL, n. peninsular FL, and CA; e. Russia, China, Korea, and Japan.

ID notes: The plant can be very coarse, up to 3 m in height and the stem to 5 cm in diameter. Submersed leaves are deeply dissected.

Origin/Endemic status: Native

Taxonomy Comments: The taxonomic status of Sium floridanum Small, known from se. VA south to GA, needs additional investigation; it is probably just a depauperate shade form.

Synonymy ⓘ: = Ar, C, Fl7, FNA, GrPl, Il, K1, K3, K4, Mi, Mo2, NcTx, NE, NY, Pa, RAB, Tat, Tn, Tx, Va, W, WH3, WV; > Sium carsonii Durieu ex A.Gray; > Sium cicutaefolium Schrank – S; > Sium floridanum Small – F, G, GW2, MC, S; > Sium suave Walter – F, G, GW2, MC

Show in key(s)

Show parent genus

Wetland Indicator Status:

  • Atlantic and Gulf Coastal Plain: OBL (taxonomic lump from wetland indicator species)
  • Eastern Mountains and Piedmont: OBL (taxonomic lump from wetland indicator species)
  • Great Plains: OBL
  • Midwest: OBL
  • Northcentral & Northeast: OBL (taxonomic lump from wetland indicator species)

Heliophily ⓘ: 7

Your browser does not support SVGs

Hover over a shape, letter, icon, or arrow on the map for definition or see the legend.

image of plant© Gary P. Fleming | Original Image ⭷
image of plant© Erik Danielson source | Original Image ⭷
image of plant© Gary P. Fleming | Original Image ⭷
image of plant© Nancy L. Martin | Original Image ⭷
image of plant© Erik Danielson source | Original Image ⭷

Feedback

See something wrong or missing on about Sium suave? Let us know here: (Please include your name and email if at all complicated so we can clarify if needed.) We greatly appreciate feedback, and will include updates from you in our next webapp update, which can take a few months.


Horticultural Information

NCBG trait

Intro: Erect perennial that can be aquatic, found in freshwater marshes, brackish marshes and swamp forests.

Stems: Stems stout, hollow, longitudinally ribbed, branching above middle, smooth.

Leaves: Leaves alternate, pinnately divided into 5-17 lance-shaped, sharply toothed leaflets that are 1/2-6 in. long; submerged leaves, when present, are 2-3 times divided. Leaf surface smooth.

Inforescence:

Flowers: Flowers in generally flat, compound umbels (2-5 in. wide) at ends of branches, the umbellets with 20-35 flowers each; white; 1/8-1/4 in. wide; consisting of 5 petals with incurved tips, a short calyx, 5 protruding stamens and a 2-celled ovary with a pair of divergent styles.

Fruits: Fruit a joined pair of oval, ridged seeds.

Comments:

Height: 2-6 ft.

plant sale text:

bloom table text:

description: Erect perennial that can be aquatic, found in freshwater marshes, brackish marshes and swamp forests.

stems: Stems stout, hollow, longitudinally ribbed, branching above middle, smooth.

leaves: Leaves alternate, pinnately divided into 5-17 lance-shaped, sharply toothed leaflets that are 1/2-6 in. long; submerged leaves, when present, are 2-3 times divided. Leaf surface smooth.

inflorescence:

flowers: Flowers in generally flat, compound umbels (2-5 in. wide) at ends of branches, the umbellets with 20-35 flowers each; white; 1/8-1/4 in. wide; consisting of 5 petals with incurved tips, a short calyx, 5 protruding stamens and a 2-celled ovary with a pair of divergent styles.

fruits: Fruit a joined pair of oval, ridged seeds.

comments:

cultural notes:

germination code:

native range: