Sium suave

Classification	Dicots
Family	Apiaceae
Family (Traditional)	Apiaceae
Genus	Sium
Species:	Sium suave Walter
Common Name	Hemlock Waterparsnip
Growth Habit	forb
Plant Notes	**
Characteristics	Armaments: No; Milky Sap: No; Photosynthetic: Yes; Stipules: No; Woody Herbaceous: Herbaceous; Natural Area Presence: BE; Natural Area Presence: LC; Duration: Perennial; General Ecology: Mudflat; General Ecology: Terrestrial; Growth Habit: forb; Moisture Requirements: Hydric; Moisture Requirements: Wetland; Region of Origin: North America; Reproductive Phenology: June; Reproductive Phenology: July; Reproductive Phenology: August; Reproductive Phenology: September; Reproductive Phenology: October; Leaf Arrangement: alternate; Leaf Complexity: compound; Leaf Dissection: 1; Leaf Persistance: Deciduous; Leaf Petiole Type: petiolate; Leaf Type: broadleaf; Leaf Venation: pinnate; Leaflet Margins: serrate; Leaflet Number: 9; Leaflet Number: 11; Leaflet Number: 13; Base Flower Color: White; Carpel Number/Pistil: 2; Fruit Dehiscence: No; Fruit Type: Schizocarp; Fruit Wet/Dry: Dry; Hypanthium Present: No; Inflorescence Position: terminal; Inflorescence Types: corymb/cyme/umbel; Ovary Position: Inferior; Overall Flower Symmetry: Actinomorphic; Ovules per Carpel: 2; Perianth Present: Yes; Petal Fusion: No; Petal Number: 5; Pistil Complexity: Compound; Pistil Number: 1; Placentation Type: Axillary; Sepal Fusion: No; Sepal Number: 0; Sepal Number: 5; Sexuality: monoclinous; Sporangium Arrangement: N/A; Stamen Number: 5; Tepal Fusion: N/A; Tepal Number: N/A
C value	8
Status	Native; AGCP (OBL), EMP (OBL) (NWPL); TN[SNR] KY[S3S4] (State Rank); G5 (Global Rank)
Specimen(s)	View and Download Specimen Details »

** Not applicable or data not available.

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Species Distribution Map

This species has been reported in the counties highlighted in the interactive distribution map below. Click on a county to display the its name. Click the question mark icon () to view additional information about the ecoregions shown. In the map legend, there are links to toggle the visibility of the ecoregions and/or their labels. In addition, clicking on an ecoregion name will highlight that region on the map.

State Boundaries
Counties
Counties - Species Present

Ecoregions

Southeastern Plains
- Blackland Prarie
Blue Ridge Mountains
Ridge and Valley
Cumberland Plateau
Cumberland Mountains
Allegheny Plateau

Interior Plateau
- Bluegrass Region
- Nashville Basin
- Pennyroyal Karst Plain
- Western Highland Rim
- Eastern Highland Rim

Interior River Valleys and Hills
- Shawnee / Caseyville Hills
Mississippi Alluvial Plain
Mississippi Valley Loess Plains
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Synonyms

Synonym	Full Citation
Sium cicutifolium	Sium cicutifolium Schrank
Sium floridanum	Sium floridanum Small
Sium suave var. floridanum	Sium suave var. floridanum (Small) C.F. Reed

Specimens and Distribution

This species has been reported in the following counties by the herbaria listed. An overview of the individual specimens are provided in the table that follows. Click on the accession number to view details; click on column headers to sort.

Counties included on distribution map: Ballard (KY), Fulton (KY), Henderson (KY), Trigg (KY), Warren (KY), Wayne (KY), Coffee (TN), Lake (TN), Montgomery (TN), Obion (TN), Robertson (TN), Stewart (TN), Sullivan (TN), Washington (TN), Wayne (TN)

Herbaria represented by specimen data listed below: APSC, EKY, ETSU, TENN, VDB

Range of years during which specimens were collected: 1947 - 2017

Accession No. (click for full details)	County	State	Coll. Date	Collector & Collection No.	Herbarium & Herbarium Name Used
31234100213121	Fulton	Kentucky	05 Oct 1984	Raymond Athey 5063	EKY Sium suave
TENN-V-0162210	Coffee	Tennessee			TENN Sium suave
TENN-V-0162212	Coffee	Tennessee			TENN Sium suave
TENN-V-0162214	Lake	Tennessee			TENN Sium suave
TENN-V-0162227	Washington	Tennessee			TENN Sium suave
TENN-V-0162225	Stewart	Tennessee			TENN Sium suave
TENN-V-0162217	Lake	Tennessee			TENN Sium suave
TENN-V-0162224	Robertson	Tennessee			TENN Sium suave
TENN-V-0162211	Coffee	Tennessee			TENN Sium suave
TENN-V-0162213	Lake	Tennessee			TENN Sium suave
TENN-V-0162221	Obion	Tennessee			TENN Sium suave
TENN-V-0162223	Robertson	Tennessee			TENN Sium suave
TENN-V-0162216	Lake	Tennessee			TENN Sium suave
TENN-V-0162219	Lake	Tennessee			TENN Sium suave
TENN-V-0162218	Lake	Tennessee			TENN Sium suave
TENN-V-0162220	Lake	Tennessee			TENN Sium suave
APSC0029562	Stewart	Tennessee	10 Sep 2008	Edward W. Chester 14777	APSC Sium suave
APSC0029563	Stewart	Tennessee	Not shown-Not shown-Not shown	Chester 14777B	APSC Sium suave
APSC0062250	Ballard	Kentucky			APSC Sium suave
APSC0029561	Stewart	Tennessee	29 Aug 1966	Eugene Wofford 2399	APSC Sium suave
APSC0092905	Warren	Kentucky	29 Jul 2017	Mason Brock	APSC Sium suave
APSC0029566	Trigg	Kentucky	15 Aug 1986	Edward Chester	APSC Sium suave
APSC0029572	Montgomery	Tennessee	01 Oct 1949	Floyd Brown & Alfred Clebsch 743	APSC Sium suave
BRIT70204	Wayne	Tennessee	05 Aug 1969	R. Kral 36099	VDB Sium suave
BRIT70203	Wayne	Tennessee	05 Aug 1969	R. Kral 36099	VDB Sium suave
ETSU032799	Washington	Tennessee			ETSU Sium suave
ETSU032800	Washington	Tennessee			ETSU Sium suave
31234100213139	Wayne	Kentucky	28 Apr 1984	Ronald L. Jones 4247	EKY Sium suave
31234100213147	Lake	Tennessee	03 Oct 1971	Elizabeth M. Browne 71K3.6	EKY Sium suave
31234100213113	Ballard	Kentucky	13 Sep 1968	Raymond Athey 459	EKY Sium suave
TENN-V-0162222	Obion	Tennessee			TENN Sium suave
TENN-V-0162226	Sullivan	Tennessee			TENN Sium suave
TENN-V-0162215	Lake	Tennessee			TENN Sium suave
APSC0062300	Henderson	Kentucky			APSC Sium suave
APSC0029577	Montgomery	Tennessee	13 Sep 1947	Alfred Clebsch with Edward Clebsch 129-24-1; APSC 1107	APSC Sium suave
APSC0029576	Robertson	Tennessee	31 May 1979	Edward W. Chester, Floyd Scott 4023	APSC Sium suave
APSC0029575	Robertson	Tennessee	10 Sep 1979	Edward W. Chester 4291	APSC Sium suave
APSC0029574	Robertson	Tennessee	10 Sep 1979	Edward W. Chester 4291	APSC Sium suave
APSC0029567	Trigg	Kentucky	02 Aug 1986	Edward Chester	APSC Sium suave
APSC0029560	Stewart	Tennessee	10 Aug 1965	William H. Ellis 738	APSC Sium suave
APSC0062302	Henderson	Kentucky	28 Jul 1973		APSC Sium suave
APSC0062301	Henderson	Kentucky	14 Jul 1973		APSC Sium suave
APSC0029565	Stewart	Tennessee	20 Aug 1986	Edward W. Chester 86-895	APSC Sium suave
APSC0029564	Trigg	Kentucky	08 Sep 1986	Edward Chester	APSC Sium suave

View a List of All Ecological Communities

Sium suave

Related Links

Species Distribution Map

Ecoregions

Synonyms

Specimens and Distribution

Plant Photos