Iowa's native and naturalized dicots.

The following information is sorted in ascending order alphabetically by "Family".


The following Balsaminaceae are native or naturalized in Iowa.

Scientific
Name
[Eilers & Roosa]		 Author
[Eilers & Roosa]		 Subspecific Category
[Eilers & Roosa]		 Common
Name		 Family
[FNA]		 Scientific
Name
[FNA]		 Author
[FNA]		 Subspecific
Category
[FNA]		 Habitat Abundance & Distribution Geographic Areas of
Iowa Occupied		 US
Native?		 IA
Native?		 Special
Notes
Impatiens capensis Meerb. . Spotted touch-me-not . . . . Alluvial woods. Moist, wooded slopes. Marsh edges. Frequent to common throughout the state. All Yes Yes .
Impatiens pallida Nutt. . Pale touch-me-not, jewel weed . . . . Alluvial woods. Moist, wooded slopes. Infrequent in NW & NC. Frequent to common elsewhere. All Yes Yes .

The following Berberidaceae are native or naturalized in Iowa.

Scientific
Name
[Eilers & Roosa]		 Author
[Eilers & Roosa]		 Subspecific Category
[Eilers & Roosa]		 Common
Name		 Family
[FNA]		 Scientific
Name
[FNA]		 Author
[FNA]		 Subspecific
Category
[FNA]		 Habitat Abundance & Distribution Geographic Areas of
Iowa Occupied		 US
Native?		 IA
Native?		 Special
Notes
Berberis thunbergii DC. . Japanese barberry Berberidaceae Berberis thunbergii DC. . Pastures. Woods. Rare escapee from cultivation. All No No .
Berberis vulgaris L. . European barberry Berberidaceae Berberis vulgaris L. . Edges of woods. Open, disturbed ground. Rare escapee from cultivation. All No No .
Caulophyllum thalictroides (L.) Michx. . Blue cohosh Berberidaceae Caulophyllum thalictroides (L.) Michx. . Moist woods. Common in NC & NE. Infrequent in NW and SE. Rare in SW. NE, NC, NW, SE, SW Yes Yes .
Jeffersonia diphylla (L.) Pers. . Twinleaf Berberidaceae Jeffersonia diphylla (L.) Pers. . Moist, wooded slopes. Rare in NE [Allamakee, Clayton, Dubuque, & Fayette counties]. NE Yes Yes .
Podophyllum peltatum L. . Mayapple Berberidaceae Podophyllum peltatum L. . Open woods. Woodland edges. Moist upland woods. Common in E 2/3 of state. NE, NC, EC, C, SE, SC Yes Yes .

The following Betulaceae are native or naturalized in Iowa.

Scientific
Name
[Eilers & Roosa]		 Author
[Eilers & Roosa]		 Subspecific Category
[Eilers & Roosa]		 Common
Name		 Family
[FNA]		 Scientific
Name
[FNA]		 Author
[FNA]		 Subspecific
Category
[FNA]		 Habitat Abundance & Distribution Geographic Areas of
Iowa Occupied		 US
Native?		 IA
Native?		 Special
Notes
. . . . Betulaceae Alnus glutinosa (L.) Gaertner . . . . . . .
Alnus rugosa (DuRoi) Sprengel . Speckled alder Betulaceae Alnus incana (L.) Moench ssp. rugosa (Du Roi) R. T. Clausen Sandy soil in alluvial woods. Streamsides. Seeps. Rare in NE. NE Yes Yes .
Betula alleghaniensis Britton . Yellow birch Betulaceae Betula alleghaniensis Britton . North-facing, rocky, wooded slopes. Algific talus slopes. Rare in C [Hardin County], NC [Mitchell County], & NE [Allamakee, Clayton, Delaware, Dubuque, Fayette, & Winneshiek Counties]. NE, NC, C Yes Yes .
Betula nigra L. . River birch Betulaceae Betula nigra L. . Alluvial woods. Stream margins. Common in E. Infrequent to frequent in C. Rare in SW. NE, EC, C, SE, SW Yes Yes .
Betula papyrifera Marsh. . Paper birch, canoe birch Betulaceae Betula papyrifera Marsh. . Steep, sheltered, rocky bluffs. North-facing slopes. Common in Paleozoic Plateau. Rare in Iowan Surface. Rare in C [Hardin county] & in EC [Johnson county]. NE, NC, EC, C Yes Yes .
Betula pumila x nigra . . . . . . . Fen Rare in NE [Chickasaw County]. NE Yes Yes FNA does not mention this hybrid.
Betula pumila L. var. glandulifera Regel Swamp birch Betulaceae Betula pumila L. . Fens. Sedge meadows. Mesic prairies. Rare in NC [Mitchell County]. Rare in NE [Allamakee, Black Hawk, Bremer, Chickasaw, Clayton, & Howard counties]. NE, NC Yes Yes .
Carpinus caroliniana Walter . Blue beech Betulaceae Carpinus caroliniana Walter ssp. virginiana (Marshall) Furlow Moist, often rocky, wooded slopes. Common in NE. Infrequent in NC & SE. NE, NC, SE Yes Yes .
Corylus americana Walter . Hazelnut Betulaceae Corylus americana Walter . Woodland openings & borders. Infrequent in NW. Common elsewhere. All Yes Yes .
Corylus cornuta Marsh. . Beaked hazel Betulaceae Corylus cornuta Marsh. . North-facing wooded slopes. Algific talus slopes. Frequent in Paleozoic Plateau. Infrequent in the rest of the NE 1/4 of the state. NE, NC, EC, C Yes Yes .
Ostrya virginiana (P. Miller) K. Koch . Ironwood, hop hornbeam Betulaceae Ostrya virginiana (P. Miller) K. Koch . Upland woods. Wooded slopes. Frequent to common throughout the state. All Yes Yes .

The following Bignoniaceae are native or naturalized in Iowa.

Scientific
Name
[Eilers & Roosa]		 Author
[Eilers & Roosa]		 Subspecific Category
[Eilers & Roosa]		 Common
Name		 Family
[FNA]		 Scientific
Name
[FNA]		 Author
[FNA]		 Subspecific
Category
[FNA]		 Habitat Abundance & Distribution Geographic Areas of
Iowa Occupied		 US
Native?		 IA
Native?		 Special
Notes
Campsis radicans (L.) Seem. ex Bureau . Trumpet creeper . . . . Open, wooded bluffs. Fencerows. Infrequent escapee from cultivation. All Yes No .
Catalpa bignoniodes Walter . Common catalpa . . . . Disturbed areas near human habitation. Rare escapee from cultivation. All Yes No .
Catalpa speciosa Warder . Cigar tree . . . . Plantations. Disturbed areas near human habitation. Infrequent throughout the state. All Yes No .

The following Boraginaceae are native or naturalized in Iowa.

Scientific
Name
[Eilers & Roosa]		 Author
[Eilers & Roosa]		 Subspecific Category
[Eilers & Roosa]		 Common
Name		 Family
[FNA]		 Scientific
Name
[FNA]		 Author
[FNA]		 Subspecific
Category
[FNA]		 Habitat Abundance & Distribution Geographic Areas of
Iowa Occupied		 US
Native?		 IA
Native?		 Special
Notes
Anchusa azurea Miller . Alkanet . . . . Roadsides. Rare in WC [Carroll County]. Rare in NW [Dickinson County (1928)]. NW, WC Yes Yes .
Cynoglossum officinale L. . Hound's-tongue . . . . Open pastures. Pastured woods. Frequent in Paleozoic Plateau. Infrequent to rare elsewhere. All No No .
Echium vulgare L. . Blueweed . . . . Dry fields. Roadsides. Rare in SW. SW No No .
Hackelia deflexa (Wahl.)Opiz var. americana (Gray) Fern.& I. M. Johnston Stickseed . . . . Wooded, rocky slopes. Talus slopes. Frequent in E. Infrequent to rare in NC & NE. NE, NC, EC, SE Yes Yes .
Hackelia virginiana (L.) I. M. Johnston . Stickseed . . . . Open woods. Alluvium. Common in Paleozoic Plateau & in E. Infrequent to frequent elsewhere. All Yes Yes .
Lappula echinata Gilib. . Beggar's-lice . . . . Disturbed areas. Dry prairies. Loess bluffs. Common in NW. Infrequent to rare elsewhere. All No No .
Lappula redowskii (Hornem.) Greene . . . . . . Open, dry places. Railroad ballast. Disturbed areas. Rare throughout the state. All No No E&R includes 2 varieties: var. redowskii & var. texana (Scheele) Brand
Lithospermum arvense L. . Corn-gromwell . . . . Sandy, disturbed habitats. Rare in SE [Des Moines (1937), Lee, & Muscatine (1892) Counties]. Rare in SC [Mahaska County (1938)]. SE, SC No No .
Lithospermum canescens (Michx.) Lehm. . Hoary puccoon . . . . Prairie remnants. Sandy, open ground. Open, upland woods. Common throughout the state. All Yes Yes .
Lithospermum carolinense (Walter) MacM. . Hairy puccoon . . . . Dry, sandy soil. Frequent to infrequent in NE. Rare to infrequent in S 1/2 of state. NE, EC, C, WC, SE, SC, SW Yes Yes .
Lithospermum incisum Lehm. . Fringed puccoon . . . . Loess bluffs. Sandy prairies. Sandy alluvium. Common in N 1/2 of state & in SW. Rare elsewhere. All Yes Yes .
Lithospermum latifolium Michx. . American gromwell . . . . Moist woods. Frequent in NE 1/4 of state. Infrequent to rare elsewhere. All Yes Yes .
Mertensia paniculata (Aiton) G. Don . Northern lungwort . . . . Mossy, calcareous talus slopes. Rare in NE [Allamakee, Clayton, Fayette, Howard, & Winneshiek Counties]. NE Yes Yes .
Mertensia virginica (L.) Pers. ex Link . Bluebell . . . . Moist woods. Bottomlands. Frequent to infrequent in E 1/2 of state. Rare in W 1/2 of Iowa. All Yes Yes .
Myosotis micrantha Pallas . . . . . . Disturbed river terrace. Rare in NE [Dubuque County]. NE No No .
Myosotis verna Nutt. . Forget-me-not . . . . Open, sandy, alluvial woods. Infrequent to rare in SE 2/3 of state. NE, EC, C, SE, SC, SW Yes Yes .
Onosmodium molle Michx. var. hispidissimum (Mack.) Cronq. False gromwell . . . . Dry, rocky prairies. Sandy, alluvial woods. Rare in NE and SE. NE, SE Yes Yes .
Onosmodium molle Michx. var. occidentale (Mack.) I. M. Johnston False gromwell . . . . Low, sandy or gravelly prairies. Loess bluffs. Roadsides. Frequent to common in W. Rare in E. NE, NW, EC, WC, SE, SW Yes Yes .

The following Brassicaceae are native or naturalized in Iowa.

Scientific
Name
[Eilers & Roosa]		 Author
[Eilers & Roosa]		 Subspecific Category
[Eilers & Roosa]		 Common
Name		 Family
[FNA]		 Scientific
Name
[FNA]		 Author
[FNA]		 Subspecific
Category
[FNA]		 Habitat Abundance & Distribution Geographic Areas of
Iowa Occupied		 US
Native?		 IA
Native?		 Special
Notes
. . . . Brassicaceae Arabidopsis thaliana (L.)Heynhold . . . . No Yes Eurasian Native.
. . . . Brassicaceae Erysimum capitatum (Douglas ex Hooker) Greene var. capitatum . . . . . FNA [7:538]
. . . . Brassicaceae Lepidium sativum L. . . . . . FNA [7:592]: "Lepidium sativum is cultivated as a salad green and is sporadically naturalized, though never as an aggressive weed. It is seldom collected; the above range may be incomplete."
. . . . Brassicaceae Physaria gracilis (Hooker) O'Kane & Al-Shehbaz ssp. gracilis . . . . . FNA [7:641]
Alliaria petiolata (Beib.) Cavara & Grande . Garlic mustard Brassicaceae Alliaria petiolata (Beib.) Cavara & Grande . Upland and lowland woods. Wooded slopes. Roadsides. Rare. Scattered localities. Rapidly increasing its range. All No No FNA [7:745]
Alyssum alyssoides (L.) L. . . Brassicaceae Alyssum alyssoides (L.) L. . Waste areas. Disturbed soil. Rare in WC [Monona County (1932)], NW [Emmet (1927) & Dickinson Counties], & EC [Johnson County (1919)]. NW, EC, WC No No FNA [7:248]
Arabis canadensis L. . Sickle pod, rock cress Brassicaceae Boechera canadensis (L.) Al-Shehbaz . Upland woods. Ravines. Algific talus slopes. Common in Paleozoic Plateau. Infrequent to frequent elsewhere. All Yes Yes FNA [7:369]
Arabis divaricarpa A. Nelson . Purple rock cress Brassicaceae Boechera divaricarpa (A. Nelson) Love & Love . Sandy or rocky woods. Rare in C [Webster County (1903)], NW [Emmet County (1927)], NE [Delaware (1919) & Dubuque (1922) Counties], & EC [Johnson & Jones Counties]. NE, NW, EC, C Yes Yes FNA [7:374]: Not in IA.
Arabis drummondii Gray . Rock cress Brassicaceae Boechera stricta (Graham) Al-Shebaz . Prairies. Openings in woods. Infrequent in E. Rare in SC. NE, EC, SE, SC Yes Yes FNA [7:408]
Arabis glabra (L.) Bernh. . Tower mustard Brassicaceae Turritis glabra L. . Prairies. Sandy roadsides. Rare in NE, extreme E, & SC. NE, EC, SE, SC Yes Yes FNA [7:458]
Arabis hirsuta (L.) Scop. . . Brassicaceae Arabis pycnocarpa M. Hopkins . Wooded, rocky bluffs. Infrequent to rare throughout. All Yes Yes E&R includes 3 varieties: var. hirsuta, var pycnocarpa (M. Hopk.) Roll., & var. adpressipilis (M. Hopk.) Roll. FNA [7:458] includes var. pycnocarpa and var. adpressipilis M. Hopk. in IA.
Arabis laevigata (Muhl. ex Willd.)Poiret . . Brassicaceae Boechera laevigata (Muhl. ex Willd.)Al-Shehbaz . Rocky, wooded slopes. Shaded sandstone & limestone ledges. Infrequent in NE 1/4 of state. Rare in SE. NE, NC, EC, C, SE Yes Yes FNA [7:386]
Arabis lyrata L. . . Brassicaceae Arabidopsis lyrata (L.) O'Kane & Al-Shehbaz . Sandstone or limestone cliffs & ledges. Algific talus slopes. Common in Paleozoic Plateau. Infrequent to rare in rest of NE, E, & SC. NE, EC, SE, SC Yes Yes FNA [7:449]
Arabis missouriensis Greene . . Brassicaceae Boechera missouriensis (Greene) Al-Shehbaz . Rocky, wooded slopes. Rare in NE [Allamakee County]. NE Yes Yes FNA [7:391]: Not reported from IA.
Arabis shortii (Fern.) Gl. . Rock cress Brassicaceae Boechera dentata (Raf.) Al-Shehbaz & Zarucchi . Wooded talus slopes. Alluvium. Shaded bluffs. Infrequent to rare throughout. All Yes Yes FNA [7:373]
Armoracia aquatica (Eaton) Wieg. . Lake cress Brassicaceae Rorripa aquatica (Eaton) Palmer & Steyermark . Marshes. Quiet streams. Rare in EC [Scott County (pre-1900)], SE [Muscatine County (1894)], & SW [Union County (1882)]. EC, SE, SW Yes Yes .
Armoracia rusticana (Lam.) Gaertner, Meyer, & Schreber . Horseradish Brassicaceae Armoracia rusticana (Lam.) Gaertner, Meyer, & Schreber . Disturbed ground near human habitation. Rare escapee from cultivation throughout. All No No .
Barbarea vulgaris R. Br. . Yellow rocket Brassicaceae Barbarea vulgaris Aiton . Weed of roadsides. Waste places. Rare in NW. Common elsewhere. All No No E&R includes 2 varieties: var. vulgaris & var. arcuata (Opiz) Fries.
Berteroa incana (L.) DC. . Hoary alyssum Brassicaceae Berteroa incana (L.) DC. . Roadsides. Disturbed soil. Sandy, open areas. Rare in NE & SC. Frequent to infrequent elsewhere. All No No .
Brassica campestris L. . Field mustard Brassicaceae Brassica rapa L. . Fields. Waste places. Rare escapee from cultivation. All No No .
Brassica juncea (L.) Czern. . . Brassicaceae Brassica juncea (L.) Czern. . Weed of roadsides. Cultivated fields. Common in SW. Infrequent elsewhere. All No No .
Brassica kaber (DC.) Wheeler . . Brassicaceae Sinapis arvensis L. . Cultivated fields. Rare in SW [Page County]. SW Yes Yes .
Brassica napus L. . Turnip Brassicaceae Brassica napus L. . Disturbed areas. Rare escapee from cultivation. All No No .
Brassica nigra (L.) W. D. J. Koch . Black mustard Brassicaceae Brassica nigra (L.) W. D. J. Koch . Weed of roadsides. Disturbed areas. Absent in NW. Frequent to common elsewhere. NE, NC, EC, C, WC, SE, SC, SW No No .
Brassica oleracea L. . Wild cabbage Brassicaceae Brassica oleracea L. . Disturbed areas. Rare escapee from cultivation. All No No .
Camelina microcarpa Andrz. ex DC. . Small-fruited false flax Brassicaceae Camelina microcarpa DC. . Fields. Waste places. Infrequent to rare thoughout the state. All No No .
Camelina sativa (L.) Crantz . False flax Brassicaceae Camelina sativa (L.) Crantz . Waste ground. Disturbed soil. Rare in NC, NE, and SW. NE, NC, SW No No .
Capsella bursa-pastoris (L.) Medicus . Shepherd's purse Brassicaceae Capsella bursa-pastoris (L.) Medicus . Lawns. Disturbed soil. Along roads. Common throughout. All No No .
Cardamine bulbosa (Schreber) BSP. . Spring cress Brassicaceae Cardamine bulbosa (Schreber) BSP. . Shallow water. Marshes. Prairie potholes. Fens. Common in NE. Rare in W. Infrequent elsewhere. All Yes Yes .
Cardamine douglassii (Torrey) Britton . Purple cress Brassicaceae Cardamine douglassii Britton . Moist, wooded ravine bottoms. Rare in SE 1/4 of the state. EC, C, SE, SC Yes Yes .
Cardamine parviflora L. var. arenicola (Britton) Schulz Small-flowered bitter cress Brassicaceae Cardamine parviflora L. . Open, sandy soil. Rare in Iowan Surface. NE, NC, EC, C Yes Yes See FNA [7:480] for discussion of varieties.
Cardamine pensylvanica Muhl. ex Willd. . Bitter cress Brassicaceae Cardamine pensylvanica Muhl. ex Willd. . Wet ground at marsh edges. Along streams. Frequent to infrequent in NE 2/3 of state. Rare in SC [Decatur County]. NE, NC, NW, EC, C, SE Yes Yes .
Cardaria chalapensis (L.) Handel-Mazzetti . . Brassicaceae Lepidium chalapense L. . Roadsides. Pastures. Rare in SW [Page County]. SW No No .
Cardaria draba (L.) Desv. . Hoary cress Brassicaceae Lepidium draba L. . Roadisdes. Open, sandy areas. Field edges. Infrequent in NC & SW. Rare in NW & SC. NC, NW, SC, SW No No .
Chorispora tenella (Pallas) DC. . . Brassicaceae Chorispora tenella (Pallas) DC. . Roadsides. Waste ground. Disturbed areas. Rare in C [Story County], WC [Sac & Woodbury (1930) Counties], NW [Clay & Plymouth Counties], & NE [Dubuque County]. NE, NC, NW, C, WC No No .
Conringia orientalis (L.) Dum. . Hare's-ear mustard Brassicaceae Conringia orientalis (L.) Dum. . Weed of waste places. Infrequent to rare throughout. All No No .
Dentaria laciniata Muhl. ex Willd. . Toothwort Brassicaceae Cardamine concatenata (Michx.)O. Schwartz . Moist, wooded slopes. Bottomland woods. Not reported from NW. Frequent to common elsewhere. NE, NC, EC, C, WC, SE, SC, SW Yes Yes .
Descurainia pinnata (Walter) Britton var. brachycarpa (Richardson) Fern. Tansy mustard Brassicaceae Descurainia pinnata (Walter) Britton ssp. brachycarpa (Richardson) Detling. Dry, usually sandy, habitats. Rare in SW. Frequent to common elsewhere. All Yes Yes .
Descurainia sophia (L.) Webb ex Prantl . . Brassicaceae Descurainia sophia (L.) Webb ex Prantl . Dry, sandy, disturbed areas. Fields. Frequent in NW. Rare in SW & in SE [Muscatine county (1890)]. NW, SE, SW No No .
Diplotaxis muralis (L.) DC. . Wall rocket Brassicaceae Diplotaxis muralis (L.) DC. . Waste ground. Other disturbed habitats. Rare in C & N. NE, NC, NW, C No No .
Draba nemorosa L. . . Brassicaceae Draba nemorosa L. . Sandy river terraces. Rare in NE [Dubuque County]. NE Yes No .
Draba reptans (Lam.) Fern. . Whitlow grass Brassicaceae Draba reptans (Lam.) Fern. . Open, sandy or gravelly soil. Loess. Frequent in sandy places throughout. All Yes Yes E&R include 2 varieties: var reptans & var. micrantha (Nutt.) Fern.
Draba verna L. . Vernal whitlow grass Brassicaceae Draba verna L. . Sandy, alluvial terrace. Rare in NE [Buchanan County]. NE No No .
Eruca sativa P. Miller . Garden rocket Brassicaceae Eruca vesicaria (L.) Cav. ssp. sativa (P. Miller) Thell. Disturbed soil. Waste ground. Rare escapee from cultivation. All No No .
Erucastrum gallicum (Willd.) Schulz . Dog mustard Brassicaceae Erucastrum gallicum (Willd.) Schulz . Waste ground. Rare in WC [Woodbury County] & NE [Delaware & Winneshiek Counties]. NE, WC No No .
Erysimum asperum (Nutt.) DC. . Western wallflower Brassicaceae Erysimum asperum (Nutt.) DC. . Sandy prairies. Rare in C [Tama County (1895)], WC [Ida County (1925)], & SE [Van Buren County (1940)]. C, WC, SE Yes No .
Erysimum cheiranthoides L. . Wormseed mustard Brassicaceae Erysimum cheiranthoides L. . Open woods. Roadsides. Waste places. Frequent to infrequent in N 1/2. Infrequent to rare in S 1/2. All No No .
Erysimum inconspicuum (S. Watson) MacM. . . Brassicaceae Erysimum inconspicuum (S. Watson) MacM. . Dry, sandy, or gravelly places. Rare in W 1/2. Rare in C [Webster County (1906)], NW [Emmet County (1926)], & NE [Chickasaw County (1926)]. NE, NC, NW, C, WC, SC, SW. Yes Yes FNA [7:541] does not include this plant in IA.
Erysimum repandum L. . . Brassicaceae Erysimum repandum L. . Waste places. Rare in C [Story County], NW, & S [Decatur, Fremont, Jefferson (1933), Lee, & Page Counties]. NW, C, SE, SC, SW No No .
Hesperis matronalis L. . Dame's rocket Brassicaceae Hesperis matronalis L. . Roadsides. Waste ground near human habitation. Infrequent to rare in W 1/2 & E. All No No .
Iberis umbellata L. . Candy tuft Brassicaceae Iberis umbellata L. . Waste places. Rare escapee from cultivation in SC [Madison County (1942)]. SC No No FNA [7:564] does not include this plant in IA.
Iodanthus pinnatifidus (Michx.) Steudel . Purple rocket Brassicaceae Iodanthus pinnatifidus (Michx.) Steudel . Moist, sandy, alluvial woods. Rare to infrequent in S 1/2 & NE. NE, EC, C, WC, SE, SC, SW Yes Yes .
Lepidium campestre (L.) R. Br. . Field cress Brassicaceae Lepidium campestre Aiton . Roadsides. Along railroads. Disturbed ground. Frequent to infrequent in S 1/2. Rare in NC & SE. NC, EC, C, WC, SE, SC, SW No No .
Lepidium densiflorum Schrader . Peppergrass Brassicaceae Lepidium densiflorum Schrader . Roadsides. Pastures. Waste places. Common in N 1/2. Frequent in E & SC. Rare in SE & SW. All Yes Yes .
Lepidium perfoliatum L. . Perfoliate peppergrass Brassicaceae Lepidium perfoliatum L. . Disturbed ground along railroads. Rare in C [Story County] & in NW [Cherokee County (1931)]. NW, C No No .
Lepidium virginicum L. . Poor-man's pepper Brassicaceae Lepidium virginicum L. ssp. virginicum Waste grounds. Fields. Roadsides. Rare in NW. Frequent to common elsewhere. All Yes Yes .
Lesquerella ludoviciana (Nutt.) S. Watson . Silvery bladder-pod Brassicaceae Physaria ludoviciana (Nutt.) O'Kane & Al-Shehbaz . Sandy soil. Rare in C [Hardin County (1905)] & in NE [Black Hawk County (1921)]. NE, C Yes Yes .
Lobularia maritima (L.) Desv. . Sweet alyssum Brassicaceae Lobularia maritima (L.) Desv. . Roadsides. Rare escapee from cultivation in C [Poweshiek & Tama (1895) Counties], NC [Cerro Gordo County], & EC [Linn County (1937)]. NC, EC, C No No .
Nasturtium officinale R. Br. . Watercress Brassicaceae Nasturtium officinale Aiton . Cold streams. Springs. Common in NE. Widely distributed. All No No .
Neslia paniculata (L.) Desv. . Ball mustard Brassicaceae Neslia paniculata (L.) Desv. . Abandoned fields. Rare in C [Webster (1906)], EC [Johnson (1908) & Linn (1949) Counties], & SW [Mills County (1925)]. EC, C, SW No No FNA [7: 455] does not include this plant in IA.
Raphanus raphanistrum L. . Wild radish Brassicaceae Raphanus raphanistrum L. . Roadsides. Old fields. Rare throughout the state. All No No .
Raphanus sativus L. . Radish Brassicaceae Raphanus sativus L. . Disturbed ground. Rare escapee from cultivation throughout the state. All No No .
Rorippa austriaca (Crantz) Besser . Austrian field cress Brassicaceae Rorippa austriaca (Crantz) Besser . Roadsides. Disturbed ground. Rare in C [Story county] and in W [Emmet (1932), Ida, & Page Counties]. NW, C, WC, SW No No .
Rorippa palustris (L.) Besser . Marsh cress Brassicaceae Rorippa palustris (L.) Besser . Shallow water. Shores. Infrequent to common throughout the state. All Yes Yes E&R includes 4 ssp: ssp. palustris, ssp. fernaldiana (Butters & Abbe) Jonsell, ssp. glabra (Schulz) R. Stuckey, ssp. hispida (Desv.) Jonsell. FNA [7:501] includes only ssp. palustris & ssp. hispida in IA.
Rorippa prostrata (Bergeret) Schnitz & Thell. . . Brassicaceae Rorippa prostrata (Bergeret) Schnitz & Thell. . Disturbed soil of floodplains. Rare in NW [Emmet County]. NW No No FNA [7:494] does not include this plant in IA. This taxon = Rorippa amphibia X R. sylvestris.
Rorippa sessiliflora (Nutt.) A. S. Hitchcock . . Brassicaceae Rorippa sessiliflora (Nutt.) A. S. Hitchcock . Moist, sandy soil. Frequent to infrequent throughout most of the state. Rare in Paleozoic Plateau. All Yes Yes .
Rorippa sinuata (Nutt.) A.S. Hitchcock . . Brassicaceae Rorippa sinuata (Nutt.) A.S. Hitchcock . Sandy shores. Rare in W [Fremont (1888), Harrison (1907), Lyon, & Page Counties], NE [Black Hawk County (1929)], SE [Henry County (1928)], & SC [Marion County (1898)]. NE, NW, WC, SE, SC, SW Yes Yes .
Rorippa sylvestris (L.) Besser . Creeping yellow cress Brassicaceae Rorippa sylvestris (L.) Besser . Wet, often sandy, bottomlands. Rare throughout most of the state. Absent from NW & SC. NE, NC, EC, C, WC, SE, SW No No .
Sibara virginica (L.) Roll. . . Brassicaceae Planodes virginicum (L.) Greene . Marshy area. Rare in NE [Winneshiek County]. NE Yes Yes .
Sinapis alba L. . White mustard Brassicaceae Sinapis alba L. . Fields. Rare in C [Story County (1894)] & NE [Chickasaw County (1926)]. NE, C No No .
Sinapis arvensis L. . Charlock Brassicaceae Sinapis arvensis L. . Roadsides. Fields. Disturbed places. Common in W. Rare in Paleozoic Plateau. Infrequent to frequent elsewhere. All No No .
Sisymbrium altissimum L. . Tumble mustard Brassicaceae Sisymbrium altissimum L. . Fields. Roadsides. Waste places. Frequent to common in S 1/2. Frequent in NC. Infrequent to rare elsewhere. All No No .
Sisymbrium loeselii L. . . Brassicaceae Sisymbrium loeselii L. . Waste areas. Rare in C [Story County] & W [Emmet (1925), Ida, Monona, Page, Plymouth, & Woodbury Counties]. NW, C, WC, SW No No .
Sysimbrium officinale (L.) Scop. . . Brassicaceae Sysimbrium officinale (L.) Scop. . Weed of roadsides. Pastures. Fields. Waste places. Frequeent to common in S 1/2. Frequent to infrequent in N 1/2. All No No .
Thlaspi arvense L. . Penny cress Brassicaceae Thlaspi arvense L. . Weed of roadsides. Fields. Disturbed ground. Frequent to common throughout the state. All No No .

In this category a total of 114 dicots were recorded from the state of Iowa.

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