Rotala ramosior (Linnaeus) Koehne. Common name: Toothcup. Phenology: Jun-Oct. Habitat: Marshes, ditches, exposed drawdown muds and silts. Distribution: VT, NY, ON, MI, WI, MN, SD, MT, and BC, south to s. FL, TX, AZ, CA, and south through Mexico to Central America and South America; West Indies.
Origin/Endemic status: Native
Synonymy ⓘ: = Ar, C, Fl4, FNA10, GrPl, GW2, Il, K4, Meso4.1, Mex, Mi, Mo3, NcTx, NE, NY, Pa, RAB, S, S13, Tat, Tn, Va, W, WH3, Graham (1975); > Rotala ramosior (L.) Koehne var. interior Fernald & Griscom — F, G, Tx; > Rotala ramosior (L.) Koehne var. ramosior — F, G, Tx; Ammannia ramosior Linnaeus. Basionym: Ammannia ramosior L. 1753
Links to other floras: = Rotala ramosior - FNA10
Show parent genus | Show parent in key(s)
Wetland Indicator Status:
- Atlantic and Gulf Coastal Plain: OBL
- Eastern Mountains and Piedmont: OBL
- Great Plains: OBL
- Midwest: OBL
- Northcentral & Northeast: OBL
Heliophily ⓘ: 8
Hover over a shape, letter, icon, or arrow on the map for definition or see the legend.
© Shaun Pogacnik, some rights reserved (CC BY-NC), uploaded by Shaun Pogacnik source CC-BY-NC, permission granted to NCBG | Original Image ⭷
© Bruce A. Sorrie | Original Image ⭷
© Richard & Teresa Ware CC-BY-NC, permission granted to NCBG | Original Image ⭷
© Jay Horn source | Original Image ⭷
© Bruce A. Sorrie | Original Image ⭷
© Richard & Teresa Ware CC-BY-NC, permission granted to NCBG | Original Image ⭷
© Gary P. Fleming | Original Image ⭷
© abelkinser, some rights reserved (CC BY-NC) source CC-BY-NC, permission granted to NCBG | Original Image ⭷Feedback
See something wrong or missing on about Rotala ramosior? 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. If a species is not keyed, that's because keying is ongoing. Please don't send us feedback about unkeyed species.
Horticultural Information
Intro: Erect to reclining annual of marshes, ditches, exposed draw-down muds and silts.
Stems: Stems 4-angled, freely branched (sometimes unbranced), smooth, turning red over time.
Leaves: Leaves opposite or whorled, linear-oblong, petiolate, 1/2-1 1/4 in. long, smooth.
Inforescence:
Flowers: Flowers solitary in leaf axils, red, to 1/4 in. long, tubular with 4 minute, white-pink corolla lobes.
Fruits: Fruit a rounded, 4-sectioned capsule tipped with 4 teeth.
Comments:
Height: 2-15 in.
plant sale text:
bloom table text:
description: Erect to reclining annual of marshes, ditches, exposed draw-down muds and silts.
stems: Stems 4-angled, freely branched (sometimes unbranced), smooth, turning red over time.
leaves: Leaves opposite or whorled, linear-oblong, petiolate, 1/2-1 1/4 in. long, smooth.
inflorescence:
flowers: Flowers solitary in leaf axils, red, to 1/4 in. long, tubular with 4 minute, white-pink corolla lobes.
fruits: Fruit a rounded, 4-sectioned capsule tipped with 4 teeth.
comments:
cultural notes:
germination code:
native range:
0 unsaved edits on this page.