The flowering branch of the Common Heath (Epacris impressa), a plant in the Ericaceae family of heaths.

Common Heath

The flowering branch of the Common Heath (Epacris impressa), a plant in the Ericaceae family of heaths.

The flower of the Common Heath (Epacris impressa), a plant in the Ericaceae family of heaths.

Common Heath

The flower of the Common Heath (Epacris impressa), a plant in the Ericaceae family of heaths.

The flower of Eperua grandiflora, a legume in the Fabaceae family.

Legume

The flower of Eperua grandiflora, a legume in the Fabaceae family.

The Trailing Arbutus (Epigaea repens) is a spreading shrub in Ericaceae family of heaths.

Trailing Arbutus

The Trailing Arbutus (Epigaea repens) is a spreading shrub in Ericaceae family of heaths.

The English Dogwood (Philadelphus coronarius) is a deciduous shrub, here showing its epigynous stamens and petals growing on top of the ovary.

English Dogwood

The English Dogwood (Philadelphus coronarius) is a deciduous shrub, here showing its epigynous stamens…

"Equisetum sylvaticum: a, a, sheath crowned with teeth; b, branches; c, c, fruiting spikes. 2. Clypeola, bearing sporangia. 3. Spore, with elaters coiled about it." -Whitney, 1911

Wood Horsetail

"Equisetum sylvaticum: a, a, sheath crowned with teeth; b, branches; c, c, fruiting spikes. 2. Clypeola,…

The Winter Aconite (Eranthis hyemalis) is a European plant in the Ranunculaceae family of buttercups.

Winter Aconite

The Winter Aconite (Eranthis hyemalis) is a European plant in the Ranunculaceae family of buttercups.

An illustration of a young prothallus: sp, spore; pr, prothallus. A prothallium, or prothallus is usually a pteridophyte, i.e. spore-bearing plant, (almost exclusively ferns) in gametophyte stage in the alternation of generations cycle.

Young Prothallus of Fern

An illustration of a young prothallus: sp, spore; pr, prothallus. A prothallium, or prothallus is usually…

An illustration of a microscopic view under the surface of a young prothallus: pr, prothallus; w, root-hairs; an, antheridia; ar, archegonia. A prothallium, or prothallus is usually a pteridophyte, i.e. spore-bearing plant, (almost exclusively ferns) in gametophyte stage in the alternation of generations cycle.

Young Prothallus of Fern

An illustration of a microscopic view under the surface of a young prothallus: pr, prothallus; w, root-hairs;…

Eremopteris artemisiaefolia is a species of "a genus of fossil ferns, separated from Sphenopteris." -Whitney, 1911

Fossil Fern

Eremopteris artemisiaefolia is a species of "a genus of fossil ferns, separated from Sphenopteris."…

The Bell Heather (Erica cinerea) is a plant in the Ericaceae family of heaths.

Bell Heather

The Bell Heather (Erica cinerea) is a plant in the Ericaceae family of heaths.

The magnified flower of the Bell Heather (Erica cinerea) is a plant in the Ericaceae family of heaths.

Bell Heather

The magnified flower of the Bell Heather (Erica cinerea) is a plant in the Ericaceae family of heaths.

Lphioglossum (adder's-tongue) is a genus of about 25-30 species of Ophioglossales in the family Ophioglossaceae, with a cosmopolitan but primarily tropical and subtropical distribution. The name Ophioglossum comes from the Greek, and means "snake-tongue". Adders-tongues are so-called because the spore-bearing stalk is thought to resemble a snake's tongue. Each plant typically sends up a small, undivided leaf blade with netted venation, and the spore stalk forks from the leaf stalk, terminating in sporangia which are partially concealed within a structure with slitted sides.

Adderstongue

Lphioglossum (adder's-tongue) is a genus of about 25-30 species of Ophioglossales in the family Ophioglossaceae,…

Eriocaulon setaceum is a plant species in the Eriocaulaceae family of pipeworts.

Pipewort

Eriocaulon setaceum is a plant species in the Eriocaulaceae family of pipeworts.

The flowering branch of the coca plant (Erythroxylon coca) best known for its use in the drug cocaine.

Coca

The flowering branch of the coca plant (Erythroxylon coca) best known for its use in the drug cocaine.

The leaf of the coca plant (Erythroxylon coca) best known for its use in the drug cocaine.

Coca Leaf

The leaf of the coca plant (Erythroxylon coca) best known for its use in the drug cocaine.

"Escallonia macrantha. Escallonia is a South American genus of trees or shrubs, of the natural order Saxifragaceae, allied to the Itea of the United States." -Whitney, 1911

Escallonia

"Escallonia macrantha. Escallonia is a South American genus of trees or shrubs, of the natural order…

Corallina, a modern lime-secreting alga (entire plant).

Corallina

Corallina, a modern lime-secreting alga (entire plant).

A mass of coccoliths; a marine pelagic plant of low order covered with calcereous plates. A coccolithophore is a unicellular, eukaryotic phytoplankton (alga).

Coccolithophora

A mass of coccoliths; a marine pelagic plant of low order covered with calcereous plates. A coccolithophore…

Colonial, plant-like animals closely related to jellyfish, with stinging cells, Any member of the invertebrate order Hydroida (class Hydrozoa, phylum Cnidaria). Hydroids have three basic life-cycle stages: (1) a tiny free-swimming planula larva about 1 mm (0.04 inch) long, which settles and grows into (2) a sessile (attached), usually colonial hydroid stage, which in turn liberates (3) medusa.

Medusa of a Hydroid

Colonial, plant-like animals closely related to jellyfish, with stinging cells, Any member of the invertebrate…

A flowering branch of the Blue Gum Tree (Eucalyptus globulus), a tree in the Myrtaceae family of evergreen plants.

Blue Gum

A flowering branch of the Blue Gum Tree (Eucalyptus globulus), a tree in the Myrtaceae family of evergreen…

The Ayapana (Ayapana triplinervis) is a flowering shrub in the Asteraceae family of daisies.

Ayapana

The Ayapana (Ayapana triplinervis) is a flowering shrub in the Asteraceae family of daisies.

The Resin Spurge (Euphorbia resinifera) is a flowering plant that superficially resembles a cactus. "Top of Stem of Euphorbia resinifera. a, involucre with inclosed flowers; b, section of same." -Whitney, 1911

Resin Spurge

The Resin Spurge (Euphorbia resinifera) is a flowering plant that superficially resembles a cactus.…

Diagram of plant zones in small lake near Merryman's Lake, Michigan.

Plant Zones

Diagram of plant zones in small lake near Merryman's Lake, Michigan.

A rush, found in northern salt marshes, <em>Juncus gerardi</em>.

Rush

A rush, found in northern salt marshes, Juncus gerardi.

A common peat-moss, <em>Hypnum</em>.

Peat Moss

A common peat-moss, Hypnum.

Common duckweed, <em>Lemna</em>. The entire plant is reduced to a leaf-like expansion which bears a long slender root and small flowers; forms green floating scum on ponds and stagnant pools.

Duckweed

Common duckweed, Lemna. The entire plant is reduced to a leaf-like expansion which bears a…

The twig-rush, a characteristic plant of the bogs of the northeastern United States.

The Twig Rush

The twig-rush, a characteristic plant of the bogs of the northeastern United States.

Diagram showing how plants fill ponds from the sides and top.

Pond Diagram

Diagram showing how plants fill ponds from the sides and top.

Extrorse or outward facing stamens of the flower of Hippocratea, a genus of staff vine.

Extrorse Stamens of Flower of Staff Vine

Extrorse or outward facing stamens of the flower of Hippocratea, a genus of staff vine.

The fava bean plant (Vicia faba or Faba vulgaris) is a flowering plant in the Fabaceae family of legumes.

Fava Bean

The fava bean plant (Vicia faba or Faba vulgaris) is a flowering plant in the Fabaceae family of legumes.

The image shows a fascicle (bundle or cluster) of flowers of a mallow plant (Malvaceae).

Fascicle of Mallow Flowers

The image shows a fascicle (bundle or cluster) of flowers of a mallow plant (Malvaceae).

The Common Male Fern (Dryopteris filix-mas) is a species of male fern in the Dryopteridaceae family.

Common Male Fern

The Common Male Fern (Dryopteris filix-mas) is a species of male fern in the Dryopteridaceae family.

A species of Seed Fern (Sphenopteris obtusiloba) is a fossil fern in the Carboniferous Era.

Seed Fern

A species of Seed Fern (Sphenopteris obtusiloba) is a fossil fern in the Carboniferous Era.

A species of Seed Fern (Sphenopteris latifolia) is a fossil fern in the Carboniferous period.

Seed Fern

A species of Seed Fern (Sphenopteris latifolia) is a fossil fern in the Carboniferous period.

A leaf which has "the form of a fiddle or violin; pandurate or panduriform: applied in botany to an obovate leaf which is contracted above the base." -Whitney, 1911

Fiddle-Shaped Leaf

A leaf which has "the form of a fiddle or violin; pandurate or panduriform: applied in botany to an…

"Fifth wheel, a horizontal plate, bent to form a whole or part of a circle, placed on the forward axle of a carriage. It is designed to support the fore part of the body while allowing it to turn freely in a horizontal plane." Today, the fifth wheel is used in coupling of trailers and towing trucks. -Whitney, 1911

Fifth Wheel

"Fifth wheel, a horizontal plate, bent to form a whole or part of a circle, placed on the forward axle…

"Fifth wheel, a horizontal plate, bent to form a whole or part of a circle, placed on the forward axle of a carriage. It is designed to support the fore part of the body while allowing it to turn freely in a horizontal plane." Today, the fifth wheel is used in coupling of trailers and towing trucks. -Whitney, 1911

Fifth Wheel

"Fifth wheel, a horizontal plate, bent to form a whole or part of a circle, placed on the forward axle…

The fruit from a fig tree (Ficus carica) showing its section.

Section of Fruit of Fig

The fruit from a fig tree (Ficus carica) showing its section.

The fimbriate petals of the flower of the Clove Pink (Dianthus caryophyllus), from the Caryophyllaceae family of pinks or carnations.

Clove Pink

The fimbriate petals of the flower of the Clove Pink (Dianthus caryophyllus), from the Caryophyllaceae…

"In botany, a runner; a weak, creeping shoot sent out from the bottom of the stem, and rooting and forming new plants at the nodes, as in the strawberry." -Whitney, 1911

Strawberry Flagellum

"In botany, a runner; a weak, creeping shoot sent out from the bottom of the stem, and rooting and forming…

Common Flax (Linum usitatissimum) is a flowering plant in the Linaceae family of flaxes.

Common Flax

Common Flax (Linum usitatissimum) is a flowering plant in the Linaceae family of flaxes.

The Blackberry Psyllid (Trioza tripunctata) is an insect that feeds on specific plants.

Blackberry Psyllid

The Blackberry Psyllid (Trioza tripunctata) is an insect that feeds on specific plants.

"Follicle. Fruit of Larkspur. A dry one-celled seed-vessel consisting of a single carpel, and dehiscent only by the ventral suture, as in the milkweed and larkspur." -Whitney, 1911

Larkspur Follicle

"Follicle. Fruit of Larkspur. A dry one-celled seed-vessel consisting of a single carpel, and dehiscent…

The Woodland Strawberry (Fragaria vesca) is a flowering plant in Rosaceae, the rose family.

Woodland Strawberry

The Woodland Strawberry (Fragaria vesca) is a flowering plant in Rosaceae, the rose family.

The Crown Imperial or Kaiser's Crown (Fritillaria imperialis) is a flowering plant in the Liliaceae, the lily family.

Crown Imperial

The Crown Imperial or Kaiser's Crown (Fritillaria imperialis) is a flowering plant in the Liliaceae,…

Known as rockweed or bladder wrack, this species of seaweed is in the Fucaceae family of brown algae. "Fructifying Tip of a Frond of Rockweed (Fucus vesiculosus). a, a, air-bladders; b, b, conceptacles." -Whitney, 1911

Fructifying Tip of a Frond of Rockweed

Known as rockweed or bladder wrack, this species of seaweed is in the Fucaceae family of brown algae.…

"Funicle. In botany, The stalk of an ovule or seed. Pod of Lunaria. a, a, a, funicles." -Whitney, 1911

Funicle of Lunaria Pod

"Funicle. In botany, The stalk of an ovule or seed. Pod of Lunaria. a, a, a, funicles." -Whitney, 1911

"In botany, applied to a monopetalous corolla shaped like a funnel, in which the tube enlarges gradually from below, it expands widely at the summit; infundibuliform." -Whitney, 1911

Funnelform Corolla

"In botany, applied to a monopetalous corolla shaped like a funnel, in which the tube enlarges gradually…

"Gall, or Oak-apple, produced by Cynips quercus-inanis, showing the internal cobwebby structure. Gall: a vegetable excrescence produced by the deposit of the egg of an insect in the bark or leaves of a plant, ordinarily to to the action of some virus deposited by the female along with the egg, but often to the irritation of the larva." -Whitney, 1911

Oak Apple Gall

"Gall, or Oak-apple, produced by Cynips quercus-inanis, showing the internal cobwebby structure. Gall:…

An illustration of a simple tree with roots.

Tree with Roots

An illustration of a simple tree with roots.

An illustration of a soldier planting a United States flag in the ground.

Planting of US Flag

An illustration of a soldier planting a United States flag in the ground.

The Gambooge tree (Garcinia gummi-gutta) is a plant in the Clusiaceae family. The species was also known as the synonyms Garcinia cambogia and Garcinia hanburyi.

Branch of Gambooge

The Gambooge tree (Garcinia gummi-gutta) is a plant in the Clusiaceae family. The species was also known…

The Yellow Jasmine (Gelsemium sempervirens) is a vine in the Gelsemiaceae family.

Yellow Jasmine

The Yellow Jasmine (Gelsemium sempervirens) is a vine in the Gelsemiaceae family.

The Huito (Genipa americana) is a small tree with edible fruit in the madder family, Rubiaceae.

Huito

The Huito (Genipa americana) is a small tree with edible fruit in the madder family, Rubiaceae.

The Woodwaxen or Dyer's Greenweed (Genista tinctoria) is a flowering plant in the legume family, Fabaceae.

Woodwaxen

The Woodwaxen or Dyer's Greenweed (Genista tinctoria) is a flowering plant in the legume family, Fabaceae.

The Great Yellow Gentian (Gentian lutea) is a flowering plant in the Gentian family, Gentianaceae.

Great Yellow Gentian

The Great Yellow Gentian (Gentian lutea) is a flowering plant in the Gentian family, Gentianaceae.

An illustration of a strawberry plant with fruit.

Strawberry Plant

An illustration of a strawberry plant with fruit.

An illustration of the cotyledon of a maple. A cotyledon is a significant part of the embryo within the seed of a plant. Upon germination, the cotyledon may become the embryonic first leaves of a seedling.

Cotyledon of a Maple

An illustration of the cotyledon of a maple. A cotyledon is a significant part of the embryo within…

An illustration of the iris flower.

Iris

An illustration of the iris flower.