low branching dark green shrub with bunches of brick-red flowers at ends of branches
red angel's trumpet
Noun
arborescent South American shrub having very large orange-red flowers
rubber tree
Noun
small genus of South American trees yielding latex
root celery
Noun
grown for its thickened edible aromatic root
redbird cactus
Noun
low tropical American shrub having powerful emetic properties
redbird flower
Noun
low tropical American shrub having powerful emetic properties
rattlesnake master
Noun
coarse prickly perennial eryngo of United States thought to cure rattlesnake bite
rattlesnake's master
Noun
coarse prickly perennial eryngo of United States thought to cure rattlesnake bite
red osier dogwood
Noun
common North American shrub with reddish purple twigs and white flowers
red dogwood
Noun
common North American shrub with reddish purple twigs and white flowers
red dogwood
Noun
European deciduous shrub turning red in autumn having dull white flowers
rye ergot
Noun
a sclerotium or hardened mass of mycelium
red valerian
Noun
European herb with small fragrant crimson or white spurred flowers
regnellidium
Noun
small latex-containing aquatic fern of southern Brazil
royal fern
Noun
large deeply rooted fern of worldwide distribution with upright bipinnate compound tufted fronds
royal osmund
Noun
large deeply rooted fern of worldwide distribution with upright bipinnate compound tufted fronds
ribbon fern
Noun
epiphytic fern with straplike usually twisted fronds of tropical Asia and Polynesia and America
ribbon fern
Noun
epiphytic fern found in lowland forests of tropical America
ribbon fern
Noun
fern of North Africa and Azores and Canary Islands
redbrush
Noun
common North American shrub with reddish purple twigs and white flowers
rattlesnake fern
Noun
American fern whose clustered sporangia resemble a snake's rattle
royal agaric
Noun
widely distributed edible mushroom resembling the fly agaric
reindeer moss
Noun
an erect greyish branching lichen of Arctic and even some north temperate regions constituting the chief food for reindeer and caribou and sometimes being eaten by humans
reindeer lichen
Noun
an erect greyish branching lichen of Arctic and even some north temperate regions constituting the chief food for reindeer and caribou and sometimes being eaten by humans
rhizopus
Noun
any of various rot causing fungi of the genus Rhizopus
ring rot fungus
Noun
fungus causing soft watery rot in fruits and vegetables and rings of dry rot around roots of sweet potatoes
rhizoid
Noun
any of various slender filaments that function as roots in mosses and ferns and fungi etc
roccella
Noun
a source of the dye archil and of litmus
ring-stalked fungus
Noun
genus of gill fungi with brown spores that is closely related to Agaricus
round-spored gyromitra
Noun
a gyromitra with a brown puffed up fertile part and a rosy pink fluted stalk and smooth round spores
roof mushroom
Noun
a large genus of fungi belonging to the family Pluteaceae
rust fungus
Noun
any of various fungi causing rust disease in plants
rootlet
Noun
small root or division of a root
root hair
Noun
thin hairlike outgrowth of an epidermal cell just behind the tip
rootstock
Noun
root or part of a root used for plant propagation
rootstock
Noun
a horizontal plant stem with shoots above and roots below serving as a reproductive structure
root climber
Noun
a plant that climbs by its adventitious roots e.g. ivy
rhizome
Noun
a horizontal plant stem with shoots above and roots below serving as a reproductive structure
rootstalk
Noun
a horizontal plant stem with shoots above and roots below serving as a reproductive structure
raceme
Noun
usually elongate cluster of flowers along the main stem in which the flowers at the base open first
rock plant
Noun
plant that grows on or among rocks or is suitable for a rock garden
rupestral plant
Noun
plants growing among rocks
rupestrine plant
Noun
plants growing among rocks
rupicolous plant
Noun
plants growing among rocks
root system
Noun
a developed system of roots
rhizoctinia
Noun
any fungus now or formerly belonging to the form genus Rhizoctinia
root crop
Noun
crop grown for its enlarged roots: e.g. beets
root cap
Noun
thimble-shaped mass of cells covering and protecting the growing tip of a root
runcinate leaf
Noun
a leaf having incised margins with the lobes or teeth curved toward the base
resurrection fern
Noun
fern growing on rocks or tree trunks and having fronds greyish and scurfy below