black salsify
A perennial member of the sunflower family (Asteraceae), cultivated as a root vegetable (Pseudopodospermum hispanicum, syn. Scorzonera hispanica).

black-jack
Sphalerite; zincblende.
Caramel or burnt sugar, used to colour wines, spirits, ground coffee, etc.
A large leather vessel for beer, etc.
A water oak or barren oak (Quercus nigra).
A native African longshoreman or sailor working on a boat.
A coalfish (Pollachius virens).
A larva of a sawfly of species Athalia rosae (syns. Athalia centifolia, A. spinarum).
Alternative form of blackjack.

blanket flower
Synonym of gaillardia (“flowering plant”).

blanket flowers
plural of blanket flower

blanketflower
Gaillardia; a plant of the genus Gaillardia.

blanketflowers
plural of blanketflower

blazing star
Used other than figuratively or idiomatically: see blazing, star.
A comet.
Any of various plants including:
Any of various plants including:
Any of various plants including:
Any of various plants including:
Any of various plants including:

blessed thistle
Centaurea benedicta (formerly usually called Cnicus benedictus), a thistle-like plant native to the Mediterranean.

blitzweed
Synonym of fireweed.

blizzasters
plural of blizzaster

bloodweed
Synonym of great ragweed.

bloodweeds
plural of bloodweed

bloodwort
Any of various plants with red roots or leaves.
Any of various plants with red roots or leaves.
Any of various plants with red roots or leaves.
Any of various plants used or formerly used to staunch bleeding.
Any of various plants used or formerly used to staunch bleeding.
Any of various plants used or formerly used to staunch bleeding.

bloodworts
plural of bloodwort

blowball
The downy seedhead of a dandelion, a dandelion clock.

blowballs
plural of blowball

blue bottle
Alternative spelling of bluebottle.

blue daisy
Common chicory (Cichorium intybus)

blue sailors
plural of blue sailor

bluemink
Ageratum houstonianum (blueweed).

bluetop
A stake or other marker set into the subgrade to indicate the desired grade elevation.
Synonym of blue snakeweed.

bluetops
plural of bluetop

bombweed
Synonym of fireweed.

boneseed
An upright shrub in the sunflower family (Osteospermum moniliferum, syn. Chrysanthemoides monilifera), native to South Africa but is an invasive pest in Australia and New Zealand.
Subspecies Osteospermum moniliferum subsp. monilifera (the subspecies Osteospermum moniliferum subsp. rotundata being known there as bitou bush)

boneseeds
plural of boneseed

boneset
Any of several plants of the genera Eupatorium and Ageratina.
The herb common boneset (Eupatorium perfoliatum).
Comfrey.

bonesets
plural of boneset

brickellbush
Any of the flowering species of the genus Brickellia.

bristly hawksbeard
The plant Crepis setosa.

brittlebush
A shrub native to deserts in the southwestern US and northern Mexico, Encelia farinosa.

brittlebushes
plural of brittlebush

broad-leaved ragwort
A flowering plant of species Senecio sarracenicus.

bull thistle
Spear thistle.

bull's eye
Alternative form of bullseye.

bullweed
Knapweed.

bur marigold
A plant, the beggar's ticks (Bidens spp.).

bur marigolds
plural of bur marigold

burdock
Any of the species of biennial thistles in the genus Arctium.

burdocks
plural of burdock

burnweed
Any of the flowering plants of the genus Erechtites.

burnweeds
plural of burnweed.

burrobrush
An allergenic perennial shrub of species Hymenoclea salsola, found in the deserts of Arizona and neighboring states.

burrobrushes
plural of burrobrush

burrobush
Synonym of burroweed.

bursage
Synonym of burrobrush.

bursages
plural of bursage

burweed
Any of various plants with burrs or thistles as fruit.
Alternative form of burrweed.

burweeds
plural of burweed

butterbur
Any of several Eurasian herbs, of the genus Petasites, having dense clusters of often purple flowers.

butterburs
plural of butterbur

butterdock
butterbur

butterhead lettuce
Boston lettuce

butterweed
Any of various herbaceous flowering plants in the genus Conyza or Erigeron.

butterweeds
plural of butterweed

cabbage lettuce
Any of various kinds of lettuce with shorter, flatter heads than romaine, such as crisphead or Boston lettuce.

cacosmia
A condition of perceiving odours generally as bad, or sensing imagined vile odours.

calliopsis
A flower of the genus Coreopsis.

camphorweed
Any member of species of the genus Pluchea of flowering plants in the Asteraceae family.

camphorweeds
plural of camphorweed

cankerweed
Synonym of white rattlesnake root.

cardon
Any of several large columnar cacti mostly of the genus Cereus.

cardons
plural of cardon

cardoon
Any of species Cynara cardunculus of prickly perennial plants which has leaf stalks eaten as a vegetable, related to the artichoke.

cardoons
plural of cardoon

carline thistle
Any of about 30 species of thistles in the genus Carlina and certain other closely related genera.

carrotweed
The ragweed Ambrosia elatior

carrotweeds
plural of carrotweed

cascade everlasting
Ozothamnus secundiflorus, a species of shrub found in Australia.

cat's ear
Hypochaeris gen. et spp.

cavea
The seating section of a Greek or Roman theatre or amphitheatre.

caveae
plural of cavea

caveas
plural of cavea

celtuce
A cultivar of lettuce harvested primarily for its stem, which measures 15 to 20 centimeters.

celtuces
plural of celtuce

centaurea
Any of the plants in the genus Centaurea.

centaureas
plural of centaurea

cephalea
headache

chamomile
Alternative spelling of camomile.

chamomiles
plural of chamomile

chamomilla
camomile

chamomillas
plural of chamomilla

chardoon
Obsolete form of cardoon.

chardoons
plural of chardoon

chiccories
plural of chiccory

chiccory
Dated form of chicory.

chickories
plural of chickory

chickory
Alternative spelling of chicory.

chicories
plural of chicory

chicory
Either of two plants of the Asteraceae family.
Either of two plants of the Asteraceae family.
Either of two plants of the Asteraceae family.
A coffee substitute made from the roasted roots of the common chicory, sometimes used as a cheap adulterant in real coffee.

chorisation
Alternative spelling of chorization

chorises
plural of chorisis

chorisis
The separation of a leaf (or petal or sepal) into two more parts

chorization
Synonym of chorisis.

chrysanth
Clipping of chrysanthemum.

chrysanthema
plural of chrysanthemum

chrysanthemum
Any of many flowering perennial plants, of the genus Chrysanthemum, native to China, that have showy radiate heads.

chrysanthemums
plural of chrysanthemum

chrysanths
plural of chrysanth

cichories
plural of cichory

cichory
Archaic spelling of chicory.

cineraria
plural of cinerarium

cinerarias
plural of cineraria

clotbur
The burdock.
The cocklebur.

clotburs
plural of clotbur

clotweed
cocklebur

coatbuttons
An herb, Tridax procumbens, native to tropical America and invasive elsewhere.

cocklebur
Any of the coarse composite weeds of the genus Xanthium, with a prickly fruit.

cockleburr
Alternative form of cocklebur.

cockleburrs
plural of cockleburr

cockleburs
plural of cocklebur

coffeeweed
Common chicory (Cichorium intybus).

coffeeweeds
plural of coffeeweed

colt's-foot
Alternative spelling of coltsfoot.

coltsfeet
plural of coltsfoot

coltsfoot
An herbaceous plant, species Tussilago farfara, that grows in Europe and the Middle East; yellow coltsfoot.
Various flowering plants in the genus Petasites native to Europe or Asia.
Homogyne alpina (alpine coltsfoot or purple colt's-foot).

coltsfoots
plural of coltsfoot

common boneset
The herb Eupatorium perfoliatum, used by herbalists as a stimulant, febrifuge, and laxative.

common chicory
Cichorium intybus, a somewhat woody perennial herbaceous plant of the dandelion family, many varieties of which are cultivated for salad leaves.

common daisy
A flowering plant, Bellis perennis, especially as distinguished from similar plants in the family Asteraceae.

common dandelion
The most common and well-known species of dandelion (Taraxacum officinale)