psilophyte
Any plant that is adapted to live in a savannah
Any plant of the former taxon Psilophyta

psilophytes
plural of psilophyte

psilotophyte
Any of the whisk ferns, of order Psilotales.

psilotophytes
plural of psilotophyte

psithurism
The sound of rustling leaves or wind in the trees.

psithurisma
Obsolete spelling of psithurism.

psychrophyte
Any plant that tolerates, or thrives in a cold climate, especially in Arctic or alpine conditions

psychrophytes
plural of psychrophyte

pteridophyte
Any plant of the division Pteridophyta, of simple vascular plants that reproduce via spores rather than seeds and that alternate generations of diploid (sporophyte) and haploid (gametophyte or prothallus) forms, the diploid generally being larger and more conspicuous.

pteridophytes
plural of pteridophyte

pteridosperm
Any of various extinct gymnosperms, of the division Pteridospermatophyta, resembling ferns, but producing seeds instead of spores

pteridospermatophyte
Synonym of pteridosperm.

pteridospermatophytes
plural of pteridospermatophyte.

pteridosperms
plural of pteridosperm

pteriodophyte
Misspelling of pteridophyte.

pterophyte
Any fern (of division Pteridophyta).

pterophytes
plural of pterophyte

pukatea
Laurelia novae-zelandiae, a tree of New Zealand.

pukateas
plural of pukatea

pukeweed
A flowering plant of species Lobelia inflata.

pulasan
The fruit of the tropical tree Nephelium ramboutan-ake (syn. N. mutabile)

pulasans
plural of pulasan

pulu
A silky material obtained from the fibres of Cibotium glaucum, a tree fern of Hawaii.

pumpwood
A tropical tree of the genus Cecropia.

pumpwoods
plural of pumpwood

punarnava
The flowering plant Boerhavia diffusa.

punicafolin
An ellagitannin found in the leaves of Punica granatum (pomegranate) and in Phyllanthus emblica (Indian gooseberry).

punjee
Alternative form of punji.

punjees
plural of punjee

punji
A sharpened stick, often made of bamboo and covered in feces or other biohazardous material, set in the ground to wound or impale enemy soldiers.

punjie
Alternative form of punji.

punjies
plural of punjie

punjis
plural of punji

punnaga
tamanu tree

punnai
Any of several trees, of the genus Calophyllum, from parts of India and Malaysia

punnais
plural of punnai

purao
Alternative form of purau.

purau
A Polynesian shrub or small tree, Hibiscus tiliaceus, having yellow flowers and a fibrous bark.

puraus
plural of purau

puriri
Vitex lucens, an evergreen tree endemic to New Zealand.

puriris
plural of puriri

purow
Obsolete form of purau.

purpletop
The plant Tridens flavus, a robust North American perennial bunchgrass.
The plant Verbena bonariensis.

purpletops
plural of purpletop

purplewood
The purpleheart tree

purplewoods
plural of purplewood

purplewort
Any of various plants of the genus Trifolium.

purpureocobalt
A violet-red variety of cobalt.

pursley
The plant purslane.

pussypaws
A plant of the genera Cistanthe or Calyptridium.

pussytoe
singular of pussytoes

pussytoes
Any of several species of composite flower in the genus Antennaria, known for their clusters of white fluffy flower heads.

putwa
roselle (Hibiscus sabdariffa)

puzzlegrass
A plant, the scouring rush.

pyengadu
Alternative form of pyinkado.

pyinkado
Burmese ironwood, Xylia xylocarpa

pynkado
Alternative form of pyinkado.

pyracanth
Any of various thorny shrubs of the genus Pyracantha having small white flowers followed by hard red or orange-red berries

pyracanths
plural of pyracanth

pyrenoid
any of several transparent structures found in the chloroplast of certain algae etc.; they are responsible for the fixation of carbon dioxide and the formation of starch

pyrenoids
plural of pyrenoid

pyrenolichen
A lichen that produces perithecia.

pyrenolichens
plural of pyrenolichen

pyrethrum
Any of several daisy-like perennial African plants of the genus Tanacetum, especially Tanacetum cinerariifolium.
Anacyclus pyrethrum (pellitory of Spain)
Any of several insecticides obtained from these plants; pyrethrin.

pyrethrums
plural of pyrethrum

pyrophyte
Any plant that is resistant to fire, or that needs fire to propagate

pyrophytes
plural of pyrophyte

quailberry
The plant Crossopetalum ilicifolium.
The plant Vaccinium vitis-idaea.

quamoclit
Any plant of the former genus Quamoclit.

quamoclits
plural of quamoclit

quarto
A size of paper (7.5"-10" x 10"-12.5" or 190-254 x 254-312 mm). Formed by folding and cutting one of several standard sizes of paper (15"-20" x 20"-25" or 381-508 x 508-635 mm) twice to form 4 leaves (eight sides).
A size of paper (7.5"-10" x 10"-12.5" or 190-254 x 254-312 mm). Formed by folding and cutting one of several standard sizes of paper (15"-20" x 20"-25" or 381-508 x 508-635 mm) twice to form 4 leaves (eight sides).
A book size, corresponding to the paper size.

quartos
plural of quarto

quebracho
Any of several trees of southern South America with produce very hard wood rich in tannin, especially those of the genus Schinopsis.
The wood of these trees.
The bark of these trees, formerly used in treating fever.
A tannin extracted from these trees.

quebrachos
plural of quebracho

queenweed
The wild parsnip, Pastinaca sativa.

queenwood
Daviesia arborea, a flowering plant of eastern Australia.

quenepa
The mamoncillo

quenepas
plural of quenepa

quercetagetin
A flavonol found in grasses of the genus Eriocaulon.

quercetagetins
plural of quercetagetin

quercetin
A flavonol found in many fruits, vegetables, leaves and grains.

quercetine
Archaic form of quercetin.

quercetins
plural of quercetin

quetsch
A dark-skinned variety of plum.
A liqueur made from the fruit.

quetsches
plural of quetsch

quickstick
A plant of species Gliricidia sepium.

quickwood
Any plant (typically hawthorn) used as hedging

quillai
Quillaja saponaria, the soapbark tree.
The bark of that tree.

quillais
plural of quillai

quillay
The soapbark tree, Quillaja saponaria; the bark of this tree used as a source of saponin

quillays
plural of quillay

quillwort
Any of various simple microphyllous vascular plants, of the family Isoetaceae, that resemble rushes and produce spores.

quillworts
plural of quillwort

quinaquina
cinchona bark, quinquina

quinaquinas
plural of quinaquina

quincha
A traditional Latin American construction system that uses wood and cane or giant reed to form an earthquake-proof framework that is covered in mud and plaster.

quinquino
A tree of the genus Myroxylon, yielding balsam of Peru.

quinquinos
plural of quinquino

quira
The tough wood of Platymiscium pinnatum.

quiscal
Greigia sphacelata, a Chilean bromeliad.

quitasol
Alternative form of kittysol.

quitasols
plural of quitasol

quitchgrass
A species of grass, Elymus repens.

quixabeira
The South American tree Sideroxylon obtusifolium.

quixabeiras
plural of quixabeira

raatrani
The night-blooming cestrum, Cestrum nocturnum.

raatranis
plural of raatrani

rabbitweed
The plant Gutierrezia sarothrae.

rabbitwood
Pyrularia pubera, a shrub in the sandalwood family.

raceme
An indeterminate inflorescence in which the flowers are arranged along a single central axis.

racemes
plural of raceme

radhuni
wild celery (Psammogeton involucratus).

radicle
The rudimentary shoot of a plant which supports the cotyledons in the seed, and from which the root is developed downward; the root of the embryo.
A rootlet.
Archaic form of radical.

radicles
plural of radicle

radicole
A hybrid plant (Brassicoraphanus) that is a cross between a brassica and a radish.

radicule
A radicle.

radicules
plural of radicule

radiohalo
A microscopic spherical disturbance in a rock caused by a grain of radioactive material.

radiohalos
plural of radiohalo

radula
The rasping tongue of snails and all other mollusks except bivalves.

radulae
plural of radula

rafflesia
Any of several large parasitic plants, of the genus Rafflesia, from South East Asia, that have no roots, stems or leaves; Rafflesia arnoldii has the largest known flower with a diameter of over a yard.