heliotrope
A plant with flowers which turn to face and follow the sun, such as (archaic) marigolds and sunflowers.
A plant with flowers which turn to face and follow the sun, such as (archaic) marigolds and sunflowers.
A plant with flowers which turn to face and follow the sun, such as (archaic) marigolds and sunflowers.
The fragrance of Heliotropium arborescens flowers, or a scent resembling this fragrance.
A light purple or violet colour like that of Heliotropium arborescens flowers.
An instrument that uses a mirror to reflect sunlight for purposes such as signalling, or (surveying) triangulation (where the reflected light is detected by another surveyor positioned some distance away).
An ancient type of sundial consisting of a bowl with a perpendicular gnomon mounted in the centre.
Synonym of bloodstone (“a green chalcedony that is sprinkled with red spots or veins of hematite”).

heliotropes
plural of heliotrope

helleborine
Any of a number of species of orchid of the genera Epipactis and Cephalanthera.

helophyte
Any plant (typically found in marshy ground) whose buds overwinter under water; helophytes grow partially submerged, and regrow from beds below the water.

helophytes
plural of helophyte

hemangioendothelioma
Any of a range of vascular neoplasms

hemangioendotheliomas
plural of hemangioendothelioma

hemangioendotheliomata
plural of hemangioendothelioma

hemerochore
A hemerochorous plant.

hemerochores
plural of hemerochore

hemerophyte
Any cultivated plant, especially one introduced from elsewhere

hemerophytes
plural of hemerophyte

hemicryptophyte
Any plant whose buds rest on the surface, being protected in various ways.

hemicryptophytes
plural of hemicryptophyte

hemiepiphyte
Any plant that spends part of its life cycle as an epiphyte

hemiepiphytes
plural of hemiepiphyte

hemikryptophyte
Alternative form of hemicryptophyte.

hemikryptophytes
plural of hemikryptophyte

hemiparasite
Any parasitic plant that obtains energy by photosynthesis as well as from its host

hemiparasites
plural of hemiparasite

hemiplasy
A condition similar to homoplasy that is the topological discordance between a gene tree and a species tree attributable to lineage sorting of genetic polymorphisms that were retained across successive nodes in a species tree

hempvine
Any plant of the genus Mikania.

hempvines
plural of hempvine

hempweed
Any of various plants of the genus Eupatorium.

hempweeds
plural of hempweed

hempwort
Any plant of the family Cannabaceae; a hemp or hop.

hempworts
plural of hempwort

henware
A seaweed, badderlocks.

herb
Any green, leafy plant, or parts thereof, used to flavour or season food.
A plant whose roots, leaves or seeds, etc. are used in medicine.
Cannabis.
A plant whose stem is not woody and does not persist beyond each growing season
Grass; herbage.
(always with pronounced /h/) A lame or uncool person.

herbar
A herb.

herbars
plural of herbar

herbelet
Alternative form of herblet.

herbelets
plural of herbelet

herbfield
A plant community dominated by herbaceous plants, especially forbs and grasses.

herbfields
plural of herbfield

herblet
A small herb.

herblets
plural of herblet

herbs
plural of herb

hermodactyl
A type of root, probably from a plant of the genus Colchicum, as imported and used in Western medicine.

hermodactyls
plural of hermodactyl

heronbill
Alternative form of heronsbill.

heronsbill
Synonym of storksbill (“plant of genus Erodium”).

heronsbills
plural of heronsbill

heshouwu
The plant Reynoutria multiflora.

heterauxesis
unequal growth of a cell, or of part of a plant.

heterocliticon
In Indo-European linguistics, a term which is heteroclitic, i.e. which has different stem forms depending on grammatical case.

heterokontophyte
Any heterokont alga

heterokontophytes
plural of heterokontophyte

heteromycotroph
Synonym of myco-heterotroph.

heteromycotrophs
plural of heteromycotroph

heterophylly
Marked changes in leaf morphology induced by environmental conditions; the ability to display such changes.
Significant variation in leaf shape on a same plant.

heterophyte
Any plant that obtains its nourishment from other (living or dead) plants; includes parasites and saprophytes

heterophytes
plural of heterophyte

hevamine
A chitinase present in the rubber tree Hevea brasiliensis

hevea
Any of the genus Hevea of flowering plants in the spurge family, including the economically important rubber tree Hevea brasiliensis.

heveas
plural of hevea

hevein
a form of lectin, in the rubber tree Hevea brasiliensis, associated with latex coagulation

heveins
plural of hevein

hexander
Any plant of the class Hexandria

hexanders
plural of hexander

hiawa
Alternative form of hyawa.

hican
A tree that is a hybrid between a species of hickory (genus Carya) and the pecan, Carya illinoinensis.
The nut of such a tree.

hicans
plural of hican

hickoryite
Jasper of the color of hickory bark.

hideseed
An annual herb of the genus Eucrypta, found in the Southwestern US.

higuero
A calabash tree.

higueros
plural of higuero

hila
plural of hilum

hili
plural of hilus

hilum
The eye of a bean or other seed; the mark or scar at the point of attachment of an ovule or seed to its base or support.
The nucleus of a starch grain.
A depression or fissure through which ducts, nerves, or blood vessels enter and leave a gland or organ.

hilus
A hilum.

hinau
Elaeocarpus dentatus, a tree of New Zealand.

hinoki
A tree (species Chamaecyparis obtusa), the Japanese cypress.
The wood of this tree.

hinokis
plural of hinoki

hinokitiol
A natural monoterpenoid found in the wood of trees in the family Cupressaceae.

hippeastrum
Any plant of the genus Hippeastrum.

hippeastrums
plural of hippeastrum

hippurid
A plant of the former tribe Hippurideae, now considered to be part of the Callitricheae; a mare's tail.

hippurids
plural of hippurid

hoarhound
Alternative form of horehound.

hoarhounds
plural of hoarhound

hoarwithy
A wayfaring-tree (Viburnum lantana).

hoasca
Synonym of ayahuasca.

hobnut
The hopniss or its tuber.

hogberries
plural of hogberry

hogberry
Any of several plants or their berries, usually neglected by humans
Any of several plants or their berries, usually neglected by humans
Any of several plants or their berries, usually neglected by humans

hogvine
The plant Camonea umbellata.

holei
Ochrosia kilaueaensis, an extinct species of flowering plant from Hawaii.

holewort
Alternative form of hollowwort.

hollowwort
The plant Corydalis cava.

holmberries
plural of holmberry

holmberry
A holly bush.

holming
A former Welsh tradition, on St. Stephen's Day, of slashing female servants and late risers with holly branches.

holoepiphyte
Any epiphyte that spends its whole life cycle without contact with the ground

holoepiphytes
plural of holoepiphyte

holomycotroph
A holomycotrophic plant

holomycotrophs
plural of holomycotroph

hom
Alternative form of haoma (“sacred plant”).

homogamy
Fertilization of a flower by pollen from the same plant.
The quality of being homogamous.
Breeding between similar individuals.
Marriage or other union between similar people, or people of the same sex.

homospore
any plant producing spores of the same size and type.

homospores
plural of homospore

honeyware
badderlocks, Alaria esculenta, a type of seaweed

hongerblom
Senecio arenarius, a South African ragwort with pink flowers.

honoki
Wood from Magnolia hypoleuca or Magnolia obovata.

hoodwort
A plant, Scutellaria galericulata, the common skullcap.

hookgrass
Any of several species of sedge in the genus Uncinia the seeds of which are hooked and attach themselves to passers-by.

hopbind
Alternative form of hopbine.

hopbinds
plural of hopbind

hopbine
The climbing stem of the hop.

hopbines
plural of hopbine

hopsage
Any of various plants of the genus Grayia.

hopsages
plural of hopsage

hopvine
The stock or stem of the hop.

hopvines
plural of hopvine

hordock
A plant, possibly burdock.

hordocks
plural of hordock