horehound
Any plant of the genus Marrubium.
Any plant of the genus Marrubium.
Any plant of the genus Ballota.

horehounds
plural of horehound

horoeka
The lancewood tree, Pseudopanax crassifolius.

horoekas
plural of horoeka

horokaka
The plant Disphyma australe.

horopito
Either of two plant species in the Pseudowintera genus.

horsefeet
plural of horsefoot

horsefoot
Coltsfoot, a plant of species (Tussilago farfara)
A horseshoe crab (Limulidae spp.).

horsefoots
plural of horsefoot

horseheal
The plant elecampane.

horseherb
The straggler daisy.

hostoria
plural of hostorium

hostorium
Alternative form of haustorium.

houhere
Any of various New Zealand plants of the genus Hoheria.

houheres
plural of houhere

houndsberry
The common dogwood.

houseleek
Any of several succulent plants, of the genus Sempervivum, having a rosette of fleshy leaves.

houseleeks
plural of houseleek

houseplant
A plant that is grown indoors in places such as a house or office for decorative purposes.
A variety of plant that is especially suited to such cultivation, or that is frequently grown in such settings.

houseplants
plural of houseplant

huajillo
The shrub Senegalia berlandieri, formerly Acacia berlandieri.

huamuchil
The fabaceous flowering plant Pithecellobium dulce.

huanghuali
The Chinese tree Dalbergia odorifera, or the wood of this tree, which is often used in Chinese woodworking.

huauzontle
A flowering plant of the goosefoot family, Chenopodium berlandieri, consumed primarily for its edible inflorescence.

huiscoyol
Bactris longiseta, an arecaceous flowering plant.

huiscoyols
plural of huiscoyol

hulver
holly (plant)

humiri
A fragrant balsam obtained from Brazilian trees of the genus Humiria.

hungerweed
Synonym of starve-acre.

huperzia
A firmoss of the genus Huperzia.

huperzias
plural of huperzia

hupiro
The stinkwood, Coprosma foetidissima.

huratoxin
A poisonous diterpene found in trees of genus Hura.

hursinghar
night jasmine (Nyctanthes arbor-tristis).

hyacinth
Any bulbous plant of the genus Hyacinthus, native to the Mediterranean and South Africa.
A variety of zircon, ranging in color from brown, orange, reddish-brown and yellow; a jacinth.

hyacinths
plural of hyacinth

hyawa
Protium heptaphyllum, one of many species known as incense tree.
The aromatic gum of this tree.

hyawas
plural of hyawa

hydatophyte
An obligate waterplant; a plant which lives partly or completely submerged in water, such as water lettuce (Pistia stratiotes).

hydatophytes
plural of hydatophyte

hydroautogamy
underwater self-pollination

hydrocauli
plural of hydrocaulus

hydrocaulus
The hollow stem of a hydrozoan

hydrochore
A plant whose spores, seeds, or fruits are dispersed by water.

hydrochores
plural of hydrochore

hydrodictyon
Any green alga of the genus Hydrodictyon (water net).

hydrodictyons
plural of hydrodictyon

hydroformer
The industrial plant in which hydroforming takes place

hydroformers
plural of hydroformer

hydrogeophyte
Any aquatic geophyte

hydrogeophytes
plural of hydrogeophyte

hydrohalophyte
A halophyte that lives in salty water

hydrohalophytes
plural of hydrohalophyte

hydrohemicryptophyte
Any aquatic hemicryptophyte

hydrohemicryptophytes
plural of hydrohemicryptophyte

hydrolat
An aromatic hydrosol, especially one made by steam distillation of a plant extract

hydrolats
plural of hydrolat

hydromegatherm
Any plant whose development requires a lot of heat and moisture.

hydromegatherms
plural of hydromegatherm

hydrophyte
A plant that lives in or requires an abundance of water, usually excluding seaweed.

hydrophytes
plural of hydrophyte

hydropriming
The soaking of seed in water prior to sowing.

hydrorhiza
The rootstock or decumbent stem by which a hydroid is attached to other objects

hydrorhizae
plural of hydrorhiza

hydrorhizas
plural of hydrorhiza

hydrosere
A plant succession in which an open freshwater naturally dries out, gradually becoming swamp, marsh, etc. and ultimately woodland.

hydroseres
plural of hydrosere

hydrotherophyte
Any aquatic therophyte

hydrotherophytes
plural of hydrotherophyte

hygrophyte
Any plant that thrives on very wet but not submerged ground.

hygrophytes
plural of hygrophyte

hylophyte
A plant that grows best in woods or forests.

hylophytes
plural of hylophyte

hymenachne
Any wetland grass of the genus Hymenachne

hymenachnes
plural of hymenachne

hymenolichen
A lichen that is symbiotically associated with a hymenomycetous fungus.

hymenolichens
plural of hymenolichen

hyperaccumulator
Any plant that can accumulate large quantities of trace elements from its environment, and thus may be used in phytoremediation or phytomining.

hyperaccumulators
plural of hyperaccumulator

hyperacuities
plural of hyperacuity

hyperacuity
sensory performance finer than the receptor grain

hyperforin
A prenylated phloroglucinol derivative produced by some members of the plant genus Hypericum, notably Hypericum perforatum (St John's wort).

hyperforins
plural of hyperforin

hypericon
Hypericum; St. John's wort.

hypernic
The wood of a tropical tree Haematoxylon brasiletto (found in Nicaragua).
A red dye extracted from this wood.

hypernics
plural of hypernic

hyperphyll
A distal part of a sprout or a leaf.

hyperphylls
plural of hyperphyll

hypocist
An astringent inspissated juice obtained from the fruit of a plant (Cytinus hypocistis), growing from the roots of the Cistus, a small European shrub.

hypocotyl
In plants with seeds, that portion of the embryo or seedling between the root and cotyledons.

hypocotyls
plural of hypocotyl

hypogyn
Any hypogynous plant.

hypogyns
plural of hypogyn

hypolith
A plant that lives underneath rocks, usually in climatically extreme deserts.

hypoliths
plural of hypolith

hyponasty
an upward bending of leaves or other plant parts, caused by increased growth on their lower surface

hypophyll
A proximal part of a sprout or a leaf.

hypophylls
plural of hypophyll

hypopodia
plural of hypopodium

hypopodium
The basal podium of a foliage leaf.

hyporhachides
plural of hyporhachis

hyporhachis
The stem of an aftershaft.

hypsophylls
plural of hypsophyll

hysterophyte
A plant or fungus that lives on dead or living organic matter.

hysterophytes
plural of hysterophyte

iberis
Any plant of the genus Iberis; a candytuft.

iberises
plural of iberis

iceleaf
A curly variety of lettuce.

iceroot
The plant goldenseal (Hydrastis canadensis).

ichnofauna
Fauna that leaves tracks, spoor, footprints, etc.

ichnofaunas
plural of ichnofauna

ichomage
Alternative spelling of oichomage.

ichu
A grass of species Stipa ichu.

icker
A head of grain.

ickers
plural of icker

idigbo
A combretaceous timber-yielding African tree of species Terminalia ivorensis.

idioblast
An isolated specialised cell found in the midst of an otherwise homogeneous group of cells in plant tissue.

idioblasts
plural of idioblast

idopyranose
A rare hexose whose derivatives, obtained from the plant Vitex negundo, protect against diabetes.

idopyranoses
plural of idopyranose

ikebana
The Japanese art of flower arrangement.
An arrangement of flowers according to this art.

ikebanas
plural of ikebana

ikmo
betel pepper (plant and leaves)

ilaichi
Alternative form of elaichi.

ilala
Hyphaene coriacea, a type of palm tree native to South Africa.

ilalas
plural of ilala

imbe
The originally African tree Garcinia livingstonei.

imbes
plural of imbe

imbondo
An ordeal poison obtained from the baobab tree.

imbuia
Ocotea porosa, a tree of southern Brazil, a source of high-end timber.

imbuias
plural of imbuia

inchi
The takay nut tree (Caryodendron orinocense).

inchis
plural of inchi

indrajav
A tropical tree or shrub, Holarrhena pubescens, with various medical uses.

inee
A type of arrow poison, made from the plant Strophanthus hispidus, used especially in the areas of Togo and Cameroon.

infusor
infusorium

infusoria
plural of infusorium