types:
periwinkle
chiefly trailing poisonous plants with blue flowers
bloodleaf
any plant of the genus Iresine having colored foliage
burdock,
clotbur
any of several erect biennial herbs of temperate Eurasia having stout taproots and producing burs
wormwood
any of several low composite herbs of the genera Artemisia or Seriphidium
sage brush,
sagebrush
any of several North American composite subshrubs of the genera Artemis or Seriphidium
centaury
any plant of the genus Centaurea
matchbush,
matchweed
any of several plants of the genus Gutierrezia having tiny flower heads that resemble the heads of matches
Parthenium argentatum,
guayule
much-branched subshrub with silvery leaves and small white flowers of Texas and northern Mexico; cultivated as a source of rubber
thrift
any of numerous sun-loving low-growing evergreens of the genus Armeria having round heads of pink or white flowers
corchorus
any of various plants of the genus Corchorus having large leaves and cymose clusters of yellow flowers; a source of jute
diapensia
any boreal low-growing evergreen plant of the genus Diapensia
loosestrife
any of numerous herbs and subshrubs of the genus Lythrum
deer grass,
meadow beauty
any of several plants of the genus Rhexia usually having pink-purple to magenta flowers; eastern North America
St John's wort
any of numerous plants of the genus Hypericum having yellow flowers and transparently dotted leaves; traditionally gathered on St John's eve to ward off evil
Hedysarum boreale,
sweet vetch
perennial of western United States having racemes of pink to purple flowers followed by flat pods that separate into nearly orbicular joints
cube
any of several tropical American woody plants of the genus Lonchocarpus whose roots are used locally as a fish poison and commercially as a source of rotenone
Lotus berthelotii,
coral gem
low-growing much-branched perennial of Canary Islands having orange-red to scarlet or purple flowers; naturalized in United States
hoary pea
a plant of the genus Tephrosia having pinnate leaves and white or purplish flowers and flat hairy pods
eriogonum
any plant of the genus Eriogonum with small clustered flowers
Dryas octopetala,
mountain avens
creeping evergreen shrub with large white flowers; widely distributed in northern portions of Eurasia and North America
avens
any of various perennials of the genus Geum having usually pinnate basal leaves and variously colored flowers
woodruff
any plant of the genus Asperula
Linnaea borealis,
twinflower
creeping evergreen subshrub of the northern parts of Europe and Asia with delicate fragrant tubular bell-shaped usually pink flowers borne in pairs
milkwort
any of various plants of the genus Polygala
pachysandra
any plant of the genus Pachysandra; low-growing evergreen herbs or subshrubs having dentate leaves and used as ground cover
phlomis
any of various plants of the genus Phlomis; grown primarily for their dense whorls of lipped flowers and attractive foliage
germander
any of various plants of the genus Teucrium
blue curls
any of several plants of the genus Trichostema having whorls of small blue flowers
Vinca minor,
myrtle
widely cultivated as a groundcover for its dark green shiny leaves and usually blue-violet flowers
mugwort
any of several weedy composite plants of the genus Artemisia
knapweed
any of various plants of the genus Centaurea having purple thistlelike flowers
Asperula tinctoria,
dyer's woodruff
creeping European perennial having red or pinkish-white flowers and red roots sometimes used as a substitute for madder in dyeing
Polygala alba,
senega
perennial bushy herb of central and southern United States having white flowers with green centers and often purple crest; similar to Seneca snakeroot