snakeweed
Any of various not closely related plants reputed to cure snakebite.
Any of genus Gutierrezia of poisonous American plants; matchweed.
Bistorta officinalis (common bistort).

snakeweeds
plural of snakeweed

sneezeweeds
plural of sneezeweed

sneezewort
A hardy flowering plant of species Achillea ptarmica, poisonous to cattle, sheep and horses, but with various herbal applications in humans.

sneezewort yarrow
Sneezewort (Achillea ptarmica).

sneezeworts
plural of sneezewort

snow daisy
Any of various perennial herbs chiefly of the genus Celmisia, especially Celmisia asteliifolia, growing in high ground in southeastern Australia (including Tasmania) and New Zealand.

soldier thistle
A thistle of species Picnomon acarna, of Eurasia.

solidago
The goldenrod, or any of various similar plants in the genus Solidago.

solidagoes
plural of solidago

solidagos
plural of solidago

southernwood
An aromatic shrub, Artemisia abrotanum, related to wormwood.

southernwoods
plural of southernwood

southernwort
Synonym of southernwood.

sow thistle
Any of the thistles in one of the genera Cicerbita and Sonchus.

sow thistles
plural of sow thistle

sow-thistle
Alternative spelling of sow thistle.

sowfoot
coltsfoot

sowthistle
Alternative spelling of sow thistle.

sowthistles
plural of sowthistle

spear thistle
A biennial herb of species Cirsium vulgare.

spikeweed
Any of several annual herbaceous plants native to California, belonging to the genus Centromadia (family Asteraceae), characterized by spiny involucral bracts and typically found in seasonally dry or disturbed habitats.

spikeweeds
plural of spikeweed.

spiny cocklebur
A plant of species Xanthium spinosum.

squarehead
An honest person; a non-criminal.
A foreigner of Germanic origin, especially a German, Dutch, or Scandinavian person.
A socially conventional or boring person.

squareheads
plural of squarehead

staggerwort
Jacobaea vulgaris (syn. Senecio jacobaea), a kind of ragwort.

stammerwort
Alternative form of staggerwort.

star thistle
Alternative spelling of starthistle.

star-thistle
Alternative spelling of starthistle.

staunchweed
Synonym of milfoil.

staverwort
Alternative form of staggerwort.

stemless thistle
A plant of species Cirsium acaule.

stevia
Any of the sweet herbs of genus Stevia, native to tropical and subtropical regions of South America and western North America.
A sweetener, many times sweeter than an equal amount of sugar, extracted from Stevia rebaudiana, that can be substituted for sugar for some purposes.

stevias
plural of stevia

stick-tights
plural of stick-tight

sticktight
Hackelia virginiana, a biennial plant native to Eastern North America, with sticky burrs.

sticktights
plural of sticktight

stickyweed
A creeping plant of species Galium aparine, covered in small hooked hairs, known for clinging to clothing.
Spreading pellitory (Parietaria judaica).
West Indian chickweed (Drymaria cordata).

stiff-leaf goldenrod
Solidago rigida, native to most of eastern North America.

stinking chamomile
A plant of species Anthemis cotula

stinking hawksbeard
A roadside hawk's-beard (Crepis foetida).

stinking willie
Nickname for ragwort (Jacobaea vulgaris).

stokesia
Any of the plants in the genus Stokesia.

stokesias
plural of stokesia

straggler daisy
Calyptocarpus vialis, a creeping plant native to the American tropics and introduced widely.

strawflower
Any of many Australian plants of the genus Xerochrysum, especially Xerochrysum bracteatum, having deep yellow flowers than can be readily dried.

strawflowers
plural of strawflower

succories
plural of succory

succory
Chicory (Cichorium intybus).

sumpweed
Iva annua, annual marsh elder, a North American herbaceous annual plant in the sunflower family.
Chorisiva nevadensis

sumpweeds
plural of sumpweed

sunchoke
Synonym of Jerusalem artichoke.

sunchokes
plural of sunchoke

sunflowers
plural of sunflower

swamp beggar-ticks
an American beggar-ticks, Bidens connata, common in wet pastures and meadows

sweet annie
Alternative form of sweet Annie.

sweet coltsfoot
Various plant species of the genus Petasites.
Various plant species of the genus Petasites.
Various plant species of the genus Petasites.

sweet goldenrod
Solidago odora, a North American goldenrod.

sweet scabious
Any of species Sixalix atropurpurea (syn. Scabiosa atropurpurea) of herbaceous plants.

sweet wormwood
A fragrant Asian herb, Artemisia annua, widely naturalized, the source of the antimalarial drug artemisinin

sweet yarrow
sweet maudlin (Achillea ageratum)

tagete
Synonym of tagetes (“individual plant of the genus Tagetes”).

tagetes
Any plant of the genus Tagetes.

tall thistle
Cirsium altissimum

tansies
plural of tansy

tansy
A herbaceous plant with yellow flowers, of the genus Tanacetum, especially Tanacetum vulgare.
A dish common in the seventeenth century, made of eggs, sugar, rose water, cream, and the juice of herbs (including tansy), baked with butter in a shallow dish. "Originally flavoured with tansy, but by Pepys's time generally having spinach as its predominant flavouring."

tansy ragwort
Nickname for ragwort (Jacobaea vulgaris).

tanzies
plural of tanzy.

tanzy
Alternative form of tansy.

tarata
Synonym of lemonwood (“the tree Pittosporum eugenioides”).

taratas
plural of tarata

taraxacum
The dried root of the dandelion once used as a tonic.
A plant of the genus Taraxacum.

taraxacums
plural of taraxacum

tarbush
Alternative form of tarboosh.

tarbushes
plural of tarbush

tarragon
A perennial herb, the wormwood species Artemisia dracunculus, from Europe and parts of Asia.
The leaves of this plant (either fresh, or preserved in a vinegar/oil mixture) used as a seasoning.

tarragons
plural of tarragon

tarweed
Any of various American flowering plants that have sticky leaves.

tarweeds
plural of tarweed

telegraphweed
silk-grass goldenaster (Heterotheca grandiflora)

tetradymia
Any member of the genus Tetradymia of flowering plants.

tetradymias
plural of tetradymia

thickhead
A stupid person.
Any of several species of Australian songbirds of the genus Pachycephala.

thickheads
plural of thickhead

thistle
Any of several perennial composite plants, especially of genera Cirsium, Carduus, Cynara, or Onopordum, having prickly leaves and showy flower heads with prickly bracts.
This plant seen as the national emblem of Scotland.
An image of this plant used as a charge.
The Order of the Thistle, or membership thereof.

thistles
plural of thistle

thoroughwax
A boneset or thoroughwort (Eupatorium spp.).
A thorowax, an umbelliferous plant of species Bupleurum rotundifolium) with perfoliate leaves.
Other Bupleurum species

thoroughwort
Any of several plants of the genus Eupatorium.
Common boneset (Eupatorium perfoliatum).

thoroughworts
plural of thoroughwort

tickseed
A seed or fruit resembling a tick in shape, or in clinging to the skin or hair/fur.
A plant producing such seed or fruit, such as those in the genera:
A plant producing such seed or fruit, such as those in the genera:
A plant producing such seed or fruit, such as those in the genera:
A plant producing such seed or fruit, such as those in the genera:

tickseeds
plural of tickseed

tithonia
Any of the genus Tithonia of flowering plants in the sunflower tribe (Heliantheae) within the family Asteraceae.

tithonias
plural of tithonia

toothleaf
Any of the genus Stillingia of plants in the family Euphorbiaceae.

toothleafs
plural of toothleaf

topinambour
Synonym of Jerusalem artichoke.

topinambours
plural of topinambour

tragopogon
Either of two goat's-beards (Tragopogon pratensis (meadow salsify) or Tragopogon porrifolius (common salsify); or (in later use) any other member of the genus Tragopogon.

tragopogons
plural of tragopogon

treasure flower
A gazania, any flowers of the genus Gazania, flowering plants found in Southern Africa, especially Gazania rigens.