This is a list of species found on this site with Indistinguishable Flower Parts (Petals), in order by the Common Name that is used for each species on this site.

To see all Species with Indistinguishable in order by Common Name → START HERE

GO TO THUMBNAILS

For flowering trees and shrubs, please visit the Ontario Trees website.

Irregular 2 petals 3 petals 4 petals 5 petals 6 petals 7 or more Indistinguishable

The number of petals a flower has can be an important key to identifying the flower. Newcombe's Wildflower Guide is based on this concept.
An important thing to remember about this concept is that the "number of petals" represents the number of apparent petals. This is not necessarily the botanically-correct number of petals. Oftentimes what appear to be petals are actually sepals or bracts. It is an aid to identification, not a botanical classification.

Amaranth, Green (Amaranthus retroflexus)
Arrowgrass, Seaside (Triglochin maritima)
Aster, Upland White (Solidago ptarmicoides)
Baneberry, Red (Actaea rubra)
Baneberry, White (Actaea pachypoda)
Blazing Star, Spiked (Liatris spicata)
Bur Reed, Lesser (Sparganium americanum)
Butterbur (Petasites japonicus)
Cattail, Common (Typha latifolia)
Clearweed (Pilea pumila)
Creeper, Virginia (Parthenocissus quinquefolia)
Dock, Greater Water (Rumex britannica)
Goldenrod, Blue-stemmed (Solidago caesia)
Goldenrod, Bog (Solidago uliginosa)
Goldenrod, Canada (Solidago canadensis)
Goldenrod, Early (Solidago juncea)
Goldenrod, Grass-leaved (Euthamia graminifolia)
Goldenrod, Gray (Solidago nemoralis)
Goldenrod, Hairy (Solidago hispida)
Goldenrod, Houghton's (Solidago houghtonii)
Goldenrod, Late (Solidago gigantea)
Goldenrod, Ohio (Solidago ohioensis)
Goldenrod, Rough-leaved (Solidago patula)
Goldenrod, Rough-stemmed (Solidago rugosa)
Goldenrod, Seaside (Solidago sempervirens)
Goldenrod, Sharp-leaved (Solidago arguta)
Goldenrod, Showy (Solidago speciosa)
Goldenrod, Stiff-leaved (Solidago rigida)
Goldenrod, Stout (Solidago squarrosa)
Goldenrod, Tall (Solidago altissima)
Goldenrod, Zigzag (Solidago flexicaulis)
Goldenseal (Hydrastis canadensis)
Joe Pye Weed, Sweet-scented (Eutrochium purpureum)
Lamb's Quarters (Chenopodium album)
Lizard's Tail (Saururus cernuus)
Pinweed, Hairy (Lechea mucronata)
Purslane, Milk (Euphorbia maculata)
Pussytoes, Field (Antennaria neglecta)
Pussytoes, Parlin's (Antennaria parlinii)
Saltwort, Common (Salsola tragus)
Silverrod (Solidago bicolor)
Spurge, Cypress (Euphorbia cyparissias)
Tansy (Tanacetum vulgare)
Tearthumb, Arrow-leaved (Persicaria sagittata)
Tearthumb, Halberd-leaved (Persicaria arifolia)
Thistle, Bull (Cirsium vulgare)
Thistle, Canada (Cirsium arvense)
Thistle, Field (Cirsium discolor)
Thistle, Globe (Echinops sphaerocephalus)
Thistle, Hill's (Cirsium pumilum)
Thistle, Nodding (Carduus nutans)
Thistle, Pitcher's (Cirsium pitcheri)

Irregular 2 petals 3 petals 4 petals 5 petals 6 petals 7 or more Indistinguishable

THUMBNAILS
Amaranth, Green (Amaranthus retroflexus)	Arrowgrass, Seaside (Triglochin maritima)	Aster, Upland White (Solidago ptarmicoides)	Baneberry, Red (Actaea rubra)

Baneberry, White (Actaea pachypoda)	Blazing Star, Spiked (Liatris spicata)	Bur Reed, Lesser (Sparganium americanum)	Butterbur (Petasites japonicus)

Cattail, Common (Typha latifolia)	Clearweed (Pilea pumila)	Creeper, Virginia (Parthenocissus quinquefolia)	Goldenseal (Hydrastis canadensis)

Joe Pye Weed, Sweet-scented (Eutrochium purpureum)	Lizard's Tail (Saururus cernuus)	Pinweed, Hairy (Lechea mucronata)	Purslane, Milk (Euphorbia maculata)

Pussytoes, Field (Antennaria neglecta)	Pussytoes, Parlin's (Antennaria parlinii)	Saltwort, Common (Salsola tragus)	Spurge, Cypress (Euphorbia cyparissias)

Tansy (Tanacetum vulgare)	Tearthumb, Arrow-leaved (Persicaria sagittata)	Tearthumb, Halberd-leaved (Persicaria arifolia)	Thistle, Bull (Cirsium vulgare)

Thistle, Canada (Cirsium arvense)	Thistle, Field (Cirsium discolor)	Thistle, Globe (Echinops sphaerocephalus)	Thistle, Hill's (Cirsium pumilum)

Thistle, Nodding (Carduus nutans)	Thistle, Pitcher's (Cirsium pitcheri)

Irregular 2 petals 3 petals 4 petals 5 petals 6 petals 7 or more Indistinguishable

To see all Species with Indistinguishable in order by Common Name → START HERE