pineappleweed
Alternative form of pineapple weed.

ploughman's spikenard
The plant Inula conyzae, (now Pentanema conyzae).

ploughman's-spikenard
Alternative spelling of ploughman's spikenard.

podotheca
The scaly or skin covering of the foot of a bird or animal.

podothecae
plural of podotheca

polygyne
Describing a hive or colony (of a social insect) that has more than one active queen

pot marigold
Calendula officinalis, a species of marigold

prairie dock
The plant Silphium perfoliatum.
The plant Silphium terebinthinaceum.
The plant Parthenium integrifolium.

prairie fleabane
A type of flowering plant of species Erigeron strigosus, native to North America and naturalized in Europe and China.
A type of flowering plant of species Erigeron modestus, native to northern Mexico and south-central United States.

prickly lettuce
Lactuca serriola, an annual or biennial plant in the dandelion tribe within the daisy family, the closest wild relative of cultivated lettuce.

psilostrophe
Any member of the genus Psilostrophe.

psilostrophes
plural of psilostrophe

purple lettuce
A European perennial herb related to lettuce, Prenanthes purpurea

q-tips
plural of q-tip

quickweed
The herbaceous plant Galinsoga parviflora.

quickweeds
plural of quickweed

rabbitbrush
Any of various plants in the family Asteraceae, including most species of Chrysothamnus and some of Ericameria.

rabbitbrushes
plural of rabbitbrush

rabbitbush
Synonym of rabbitbrush.

rabbitbushes
plural of rabbitbush

ragweeds
plural of ragweed

ragwort
Any of a number of wild flowering plants with yellow flowers in the family Asteraceae, mostly belonging to Senecio and related genera.

ragworts
plural of ragwort

ramtil
A tropical African asteraceous shrub (Guizotia abyssinica) cultivated for its seeds, which yield a valuable oil used for food and as an illuminant.

raoulia
Any of the genus Raoulia of New Zealand plants in the pussytoes tribe (Gnaphalieae) within the daisy family (Asteraceae).

raoulias
plural of raoulia

rattlesnake weed
Any of several plants used in folk medicine to treat snakebites.
Any of several plants used in folk medicine to treat snakebites.
Any of several plants used in folk medicine to treat snakebites.
Any of several plants used in folk medicine to treat snakebites.

rattlesnakeroot
Alternative form of rattlesnake root.

rea
Alternative form of rei.

reas
plural of rea

resinweed
Synonym of rosinweed.

richweed
Pilea pumila, a herb of the nettle family with a smooth, juicy, pellucid stem.

richweeds
plural of richweed

roadside thistle
Spear thistle (Cirsium vulgare).
Tall thistle (Cirsium altissimum).

romaine
Ellipsis of romaine lettuce (“a type of lettuce having long crisp leaves forming a slender head”).
Ellipsis of crepe romaine (“a type of semi-sheer fabric”).

romaine lettuce
A long-leaved variety of lettuce, Lactuca sativa var. longifolia.

romaines
plural of romaine

rosinweed
Any of various composite plants which secrete resins or have a resinous smell; for example, several species in the genus Silphium in the composite family.

rosinweeds
plural of rosinweed

rough hawksbeard
A plant pf species Crepis biennis.

rubber rabbitbrush
Ericameria nauseosa, a shrub of western North America.

rudbeckia
Any member of the genus Rudbeckia of coneflowers.

rudbeckias
plural of rudbeckia

rush skeletonweed
An herbaceous plant of species Chondrilla juncea, native to parts of Europe, Asia, and North Africa, widely invasive.

safflor
safflower

safflow
Obsolete form of safflower.

safflower
A cultivated thistle-like plant, Carthamus tinctorius, family Asteraceae, now grown mainly for its oil.

safflowers
plural of safflower

sagebrush
Any of several North American aromatic shrubs of the genus Artemisia, having silvery-grey, green leaves.

sagebrushes
plural of sagebrush

sagewort
Any of a number of perennial herbs in the genus Artemisia which have the aromatic gray or silver foliage of the sagebrushes, but are not shrubby enough to be termed brush.

sageworts
plural of sagewort

salsafies
plural of salsafy

salsafy
Archaic form of salsify.

salsifies
plural of salsify

salsify
Any of several flowering plants, of the genus Tragopogon, most of which have purple flowers.
Any of several flowering plants, of the genus Tragopogon, most of which have purple flowers.
Pseudopodospermum hispanicum (syn. Scorzonera hispanica), a plant similar in flavor to T. porrifolius, with lanceolate leaves; cultivated for its dark-skinned edible root. Known in particular as "black salsify" among other common names
The edible root of these plants.

sanguinaries
plural of sanguinary

sanguinary
Involving bloodshed.
Eager to shed blood; bloodthirsty.
Consisting of, covered with, or similar in appearance to blood.

santolina
Any of the genus Santolina of evergreen shrubs in the sunflower family.

santolinas
plural of santolina

santonica
An Asian plant (Seriphidium cinum, syn. Artemisia cina), related to wormwood, which has been used since ancient times as a vermifuge due to its santonin content.

santonicas
plural of santonica

saussurea
Any thistle of the genus Saussurea.

scalesia
A type of tree found in the Galápagos, in the genus Scalesia.

scalesias
plural of scalesia

scariole
Synonym of endive.

scarioles
plural of scariole

schizotrichia
Splitting of hairs at the ends; often called split ends.

scorzonera
A herb from southern Europe (Pseudopodospermum hispanicum, syn. Scorzonera hispanica), having yellow flowers and edible carrot-shaped roots.

scorzoneras
plural of scorzonera

scrubwood
Synonym of gumwood.

scrubwoods
plural of scrubwood

sea myrtle
Alternative form of sea-myrtle.

sea oxeye
A North American flowering plant of the species Borrichia frutescens.

sea wormwood
Artemisia maritima, a European wormwood.

sea-marigold
Synonym of sea oxeye.

sea-myrtle
Synonym of groundselbush.

seamyrtle
Alternative form of sea-myrtle.

senecio
Any of the plants of the genus Senecio.

senecios
plural of senecio

shaggy soldier
A flowering plant of species Galinsoga quadriradiata, native to Mexico, but widely naturalized.

shepherd's clock
Synonym of laughing kookaburra.

shore thistle
Any thistle of genus Carduus found along a shore, known to cause poisoning of ruminants.
A thistle of the species Carduus tenuiflorus.

siamweed
Alternative form of Siam weed.

silkgrass
The flowering plant Yucca filamentosa.

siluridan
silurid.

siluridans
plural of siluridan

silversword
Any member of the genus Argyroxiphium of flowering plants native to Hawaii, with long, narrow leaves sometimes covered in silvery hairs.

silverswords
plural of silversword

skeletonweed
Several plant species in family Asteraceae:
Several plant species in family Asteraceae:
Several plant species in family Asteraceae:
Several plant species in family Asteraceae:
Flatcrown buckwheat (Eriogonum deflexum), of the buckwheat family (Polygonaceae), found in the western US and Mexico.

skeletonweeds
plural of skeletonweed

skervish
Synonym of Philadelphia fleabane.

skevish
Synonym of Philadelphia fleabane.

sleepwort
Synonym of lettuce (Lactuca sativa)

snake's-head
Alternative form of snake's head (“type of flowering plant”).

snakeplant
Synonym of Christmasvine (Ipomoea corymbosa)
A plant of species Nassauvia serpens, native to the Falkland Islands.
Alternative form of snake plant.

snakeroot
Any member of the genus Ageratina of perennials and rounded shrubs from the sunflower family, growing mainly in the warmer regions of the Americas.
Any of various plants of other genera, including:
Any of various plants of other genera, including:
Any of various plants of other genera, including:
Any of various plants of other genera, including:
Any of various plants of other genera, including:
Any of various plants of other genera, including:
Any of various plants of other genera, including:
Any of various plants of other genera, including:

snakeroots
plural of snakeroot