native to South America but naturalized in warm parts of United States
spider plant
Noun
native to South America but naturalized in warm parts of United States
spring cress
Noun
small white-flowered cress common in wet places in eastern North America
stinking clover
Noun
plant of western North America having trifoliate leaves and white or pink spider-shaped flowers
sweet alyssum
Noun
perennial European plant having clusters of small fragrant usually white flowers
sweet alison
Noun
perennial European plant having clusters of small fragrant usually white flowers
stinkweed
Noun
foetid Eurasian weed having round flat pods
silver dollar
Noun
southeastern European plant cultivated for its fragrant purplish flowers and round flat papery silver-white seedpods that are used for indoor decoration
silver dollar
Noun
a dollar made of silver
satin flower
Noun
southeastern European plant cultivated for its fragrant purplish flowers and round flat papery silver-white seedpods that are used for indoor decoration
satinpod
Noun
southeastern European plant cultivated for its fragrant purplish flowers and round flat papery silver-white seedpods that are used for indoor decoration
shadflower
Noun
annual weed of Europe and North America having a rosette of basal leaves and tiny flowers followed by oblong seed capsules
shad-flower
Noun
annual weed of Europe and North America having a rosette of basal leaves and tiny flowers followed by oblong seed capsules
swallowwort
Noun
perennial herb with branched woody stock and bright yellow flowers
swallowwort
Noun
tropical herb having orange-red flowers followed by pods suggesting a swallow with outspread wings
swallow wort
Noun
perennial herb with branched woody stock and bright yellow flowers
schizopetalon
Noun
a dainty South American annual having deeply pinnatifid leaves and racemes of fringed almond-scented purple-white flowers
sweet rocket
Noun
long cultivated herb having flowers whose scent is more pronounced in the evening
sea poppy
Noun
yellow-flowered Eurasian glaucous herb naturalized in along sandy shores in eastern North America
stiff aster
Noun
wiry tufted perennial of the eastern United States with stiff erect rough stems, linear leaves and large violet flowers
swampy beggar-ticks
Noun
bur marigold of eastern and northern United States and Canada common in wet pastures and meadows
slender knapweed
Noun
a variety of knapweed
sweet sultan
Noun
Asian plant widely grown for its sweetly fragrant pink flowers
sweet sultan
Noun
perennial of mountains of Iran and Iraq
sweet sultan
Noun
annual of Mediterranean to Portugal having hairy stems and minutely spiny-toothed leaves and large heads of yellow flowers
sea aster
Noun
a common European aster that grows in salt marshes
sea starwort
Noun
a common European aster that grows in salt marshes
silversword
Noun
low-growing plant found only in volcanic craters on Hawaii having rosettes of narrow pointed silver-green leaves and clusters of profuse red-purple flowers on a tall stem
sagebrush
Noun
any of several North American composite subshrubs of the genera Artemis or Seriphidium
sage brush
Noun
any of several North American composite subshrubs of the genera Artemis or Seriphidium
southernwood
Noun
shrubby European wormwood naturalized in North America
small white aster
Noun
a variety of aster
smooth aster
Noun
a variety of aster
southern aster
Noun
a variety of aster
starved aster
Noun
a variety of aster
sweet wormwood
Noun
wormwood of southeastern Europe to Iran
sand sage
Noun
silver-haired shrub of central and southern United States and Mexico
silvery wormwood
Noun
silver-haired shrub of central and southern United States and Mexico
solitary pussytoes
Noun
a variety of pussytoes
stinking mayweed
Noun
widespread rank-smelling weed having white-rayed flower heads with yellow discs
stinking chamomile
Noun
widespread rank-smelling weed having white-rayed flower heads with yellow discs
sneezeweed yarrow
Noun
Eurasian herb having loose heads of button-shaped white flowers and long grey-green leaves that cause sneezing when powdered
sneezewort
Noun
Eurasian herb having loose heads of button-shaped white flowers and long grey-green leaves that cause sneezing when powdered
sea dahlia
Noun
stout herb with flowers one to a stalk
spreading fleabane
Noun
well-branched plant with hairy leaves and stems each with a solitary flower head with narrow white or pink or lavender rays
seaside daisy
Noun
slightly succulent perennial with basal leaves and hairy sticky stems each bearing a solitary flower head with narrow pink or lavender rays
showy daisy
Noun
plant having branching leafy stems each branch with an especially showy solitary flower head with many narrow pink or lavender or white rays
sickleweed golden aster
Noun
a variety of golden aster
spotted Joe-Pye weed
Noun
North American herb having whorled leaves and terminal clusters of small pinkish or purple flower heads
succory
Noun
perennial Old World herb having rayed flower heads with blue florets cultivated for its root and its heads of crisp edible leaves used in salads