Nelumbo lutea Willdenow - American Lotus. 2n = 16.

Ponds, quiet streams.

Nuphar advena (Aiton) W.T. Aiton subsp. advena - Southern Yellow Pond-lily. 2n = 34.

Quiet water of streams, ponds and lakes. [N. lutea (Linnaeus) Smith subsp. advena (Aiton) Kartesz & Gandhi]

Nuphar microphylla (Persoon) Fernald - Small Yellow Pond-lily. 2n = 34.

Quiet water of streams, ponds and lakes. [included under N. lutea (Linnaeus) Smith subsp. pumila (Timm) E. O. Beal in some current references]

Nuphar variegata Engelmann ex Durand - Bullhead-lily. 2n = 34.

Ponds and quiet water of streams. [N. lutea (Linnaeus) Smith subsp. variegata (Durand) E.O. Beal]

Nuphar hybrid

Nuphar X rubrodisca Morong - .

[N. microphylla (Persoon) Fernald X N. variegata Durand; N. lutea (Linnaeus) Smith subsp. rubrodisca (Morong) E.O. Beal]

Nymphaea leibergii Morong - Pygmy Water-lily. 2n = 84, 112.

Pond and lake margins. [N. tetragona misapplied]

Nymphaea odorata Aiton subsp. odorata - Fragrant Water-lily. 2n = 56, 84.

Ponds, quiet water. [N. odorata var. gigantea Tricker]

Nymphaea odorata Aiton subsp. tuberosa (Paine) Wiersema & Hellquist - Magnolia Water-lily. 2n = ?

Ponds, quiet water. [N. tuberosa Paine]

Nymphaea hybrid

Nymphaea leibergii Morong X Nymphaea odorata Aiton subsp. odorata - .

Adlumia fungosa (Aiton) Greene ex Britton, Sterns & Poggenberg - Climbing Fumitory. 2n = 32.

Moist ledges, moist, rocky woods.

ARGEMONE ALBIFLORA Hornemann subsp. ALBIFLORA - White Prickly-poppy. 2n = 28.

Waste places, roadsides. From southeastern United States. [A. ALBA F. Lestiboudois]

ARGEMONE MEXICANA Linnaeus - Mexican Prickly-poppy. 2n = 28.

Waste places. From tropical America and Caribbean islands.

CHELIDONIUM MAJUS Linnaeus - Celandine. 2n = 12.

Damp soil about towns, roadsides, railroads, waste areas, thickets. From Eurasia. [C. MAJUS var. PLENUM Wehrhahn]

Capnoides sempervirens (Linnaeus) Borkhausen - Pale Corydalis. 2n = 16.

Ledges, dry, rocky woods, recent clearings, frequently around old campfire sites. [Corydalis sempervirens (Linnaeus) Persoon]

Corydalis aurea Willdenow subsp. aurea - Golden Corydalis. 2n = 16.

Calcareous rocky slopes, sandy or gravelly shores.

Corydalis flavula (Rafinesque) de Candolle - Yellow Fumewort. 2n = 16.

Rocky slopes, open woods, in moist soil.

CORYDALIS SOLIDA (Linnaeus) Clairville - Bird-in-a-bush. 2n = 16, 24, 32.

Waste areas. From Eurasia. [C. BULBOSA rejected name]

Dicentra canadensis (Goldie) Walpers - Squirrel-corn. 2n = 64.

Rich woods.

Dicentra cucullaria (Linnaeus) Bernhardi - Dutchman's-breeches. 2n = 32.

Rich woods, often along rivers, in calcareous soil.

DICENTRA EXIMIA (Ker Gawler) Torrey - Eastern Bleeding Heart. 2n = 16.

Moist soil, brooksides, roadsides. From farther south.

DICENTRA FORMOSA (Haworth) Walters subsp. FORMOSA - Pacific Bleeding Heart. 2n = 16, 32.

From the Pacific coast.

ESCHSCHOLZIA CALIFORNICA Chamisso subsp. CALIFORNICA - California Poppy. 2n = 12.

Dumps. From western United States and Mexico.

FUMARIA OFFICINALIS Linnaeus - Fumitory. 2n = 32, 48.

Waste places. From Europe.

GLAUCIUM FLAVUM Crantz - Yellow Horn-poppy. 2n = 12.

Waste ground, sandy shores. From Eurasia.

LAMPROCAPNOS SPECTABILIS (Linnaeus) Fukuhara - Bleeding Heart. 2n = 16.

Waste areas. From eastern Asia. [DICENTRA SPECTABILIS (Linnaeus) Lemaire]

MACLEAYA CORDATA (Willdenow) R. Brown - Plume-poppy. 2n = 20.

Waste places, thickets, roadsides. From eastern Asia.

PAPAVER DUBIUM Linnaeus - Blindeyes. 2n = 14, 28, 42.

Fields, waste places. From Europe.

PAPAVER RHOEAS Linnaeus - Corn Poppy. 2n = 14, 28.

Waste places, fields. From eastern Mediterranean.

PAPAVER SOMNIFERUM Linnaeus - Opium Poppy. 2n = 18, 22, 23, 25, 32.

Waste places, roadsides, fields. From the Mediterranean.

Sanguinaria canadensis Linnaeus - Bloodroot. 2n = 18.

Rich woods.

Platanus occidentalis Linnaeus - Sycamore. 2n = 42.

Rich soil, especially along streams.