Of the buckwheat family (Polygonaceae), the Buckwheat or Fagopyrum esculentum.

Buckwheat

Of the buckwheat family (Polygonaceae), the Buckwheat or Fagopyrum esculentum.

Of the buckwheat family (Polygonaceae): left, arrow-leaved tearthumb (Polygonum sagittatum); right, Halberd-leaved tearthumb (Polygonum arifolium).

Arrow-Leaved and Halberd-Leaved Tearthumbs

Of the buckwheat family (Polygonaceae): left, arrow-leaved tearthumb (Polygonum sagittatum); right,…

Of the goosefoot family (Chenopodiaceae), the pigweed or lamb's-quarters (Chenopodium album).

Pigweed

Of the goosefoot family (Chenopodiaceae), the pigweed or lamb's-quarters (Chenopodium album).

Of the crowfoot family (Ranunculaceae), the swamp buttercup or Ranunculus septentrionalis. The smaller image is of the leaf of the early buttercup or Ranunculus fascicularis.

Swamp Buttercup

Of the crowfoot family (Ranunculaceae), the swamp buttercup or Ranunculus septentrionalis. The smaller…

Of the crowfoot family (Ranunculaceae), the leaf and flower (showing reflexed sepals) of the bulbous buttercup or Ranunculus bulbosus.

Bulbous Buttercup

Of the crowfoot family (Ranunculaceae), the leaf and flower (showing reflexed sepals) of the bulbous…

Of the mustard family (Cruciferae), the leaf of the cut-leaved toothwort or Dentaria laciniata.

Cut-Leaved Toothwort

Of the mustard family (Cruciferae), the leaf of the cut-leaved toothwort or Dentaria laciniata.

Of the mustard family (Cruciferae), the leaf of the watercress or Radicula Nasturtium-aquaticum.

Watercress

Of the mustard family (Cruciferae), the leaf of the watercress or Radicula Nasturtium-aquaticum.

Of the mustard family (Cruciferae), the leaf of the field mustard or Brassica arvensis.

Field Mustard Leaf

Of the mustard family (Cruciferae), the leaf of the field mustard or Brassica arvensis.

Of the saxifrage family (Saxifragaceae), the leaf of the alumroot or Heuchera americana.

Alumroot Leaf

Of the saxifrage family (Saxifragaceae), the leaf of the alumroot or Heuchera americana.

Of the rose family (Rosaceae), the leaf of rough-fruited cinquefoil or Potentilla recta.

Rough-Fruited Cinquefoil

Of the rose family (Rosaceae), the leaf of rough-fruited cinquefoil or Potentilla recta.

Of the rose family (Rosaceae), the leaf of the shrubby cinquefoil or Potentilla fructosa.

Shrubby Cinquefoil Leaf

Of the rose family (Rosaceae), the leaf of the shrubby cinquefoil or Potentilla fructosa.

Of the rose family (Rosaceae), the leaf of Potentilla tridentata.

P. Tridentata

Of the rose family (Rosaceae), the leaf of Potentilla tridentata.

Of the pulse family (Leguminosae), the leaf and seed pod of Desmodium paniculatum.

D. Paniculatum

Of the pulse family (Leguminosae), the leaf and seed pod of Desmodium paniculatum.

Of the pulse family (Leguminosae), the leaf and seed pod of Desmodium Dellenii.

D. Deillenii

Of the pulse family (Leguminosae), the leaf and seed pod of Desmodium Dellenii.

Of the pulse family (Leguminosae), the leaf of the nonesuch or black medick (Medicago lupulina).

Nonesuch or Black Medick

Of the pulse family (Leguminosae), the leaf of the nonesuch or black medick (Medicago lupulina).

Of the pulse family (Leguminosae), the leaf of the trailing bush clover or Lespedeza procumbens.

Trailing Bush Clover

Of the pulse family (Leguminosae), the leaf of the trailing bush clover or Lespedeza procumbens.

Of the pulse family (Leguminosae), the leaf of Lespedeza hirta.

L. Hirta

Of the pulse family (Leguminosae), the leaf of Lespedeza hirta.

Of the pulse family (Leguminosae), the leaf of Vicia americana.

V. Americana

Of the pulse family (Leguminosae), the leaf of Vicia americana.

Of the pulse family (Leguminosae), the leaf of the common vetch or Vicia sativa.

Common Vetch

Of the pulse family (Leguminosae), the leaf of the common vetch or Vicia sativa.

Of the mallow family (Malvaceae), the leaf of the high mallow or Malva sylvestris.

High Mallow

Of the mallow family (Malvaceae), the leaf of the high mallow or Malva sylvestris.

Of the mallow family (Malvaceae), the leaf and flower of the marsh mallow or Althaea officinalis.

Marsh Mallow

Of the mallow family (Malvaceae), the leaf and flower of the marsh mallow or Althaea officinalis.

Of the mallow family (Malvaceae), the leaf of the halberd-leaved rose-mallow or Hibiscus militaris.

Halberd-Leaved Rose-Mallow

Of the mallow family (Malvaceae), the leaf of the halberd-leaved rose-mallow or Hibiscus militaris.

Of the mallow family (Malvaceae), the leaf of the bladder ketmia or Hibiscus Trionum.

Bladder Ketmia

Of the mallow family (Malvaceae), the leaf of the bladder ketmia or Hibiscus Trionum.

"Parapodium of "Heteronereis" of Nereis pelagica. 1, 2, 3, 4, the leaf-like outgrowths; c1., notopodial cirrus; c2., neuropodial cirrus; a1., a2., acicula or supporting bristles of notopodium and neuropodium; s., setae." -Thomson, 1916

N. Pelagica

"Parapodium of "Heteronereis" of Nereis pelagica. 1, 2, 3, 4, the leaf-like outgrowths; c1., notopodial…

"Embryo germinating: a running into the ground to become a root; b running up to form a stem; c the tube which supplies nutriment from the cotyledons until both roots and leaves are ready to work." -Newman, 1850

Cotyledon Germinating

"Embryo germinating: a running into the ground to become a root; b running up to form a stem; c the…

"Axillary.--Placed in the axilla (arm-pit). A term by which the angle formed by the union of the leaf and the stem is designated." -Newman, 1850

Axillary

"Axillary.--Placed in the axilla (arm-pit). A term by which the angle formed by the union of the leaf…

"Sessile.--Said of leaves seated on the stem, without footstalks." -Newman, 1850

Sessile

"Sessile.--Said of leaves seated on the stem, without footstalks." -Newman, 1850

"Toothed.--Cut so as to resemble teeth." -Newman, 1850

Toothed Leaf

"Toothed.--Cut so as to resemble teeth." -Newman, 1850

"Acuminate.--Having an open or awl-shaped point." -Newman, 1850

Acuminate

"Acuminate.--Having an open or awl-shaped point." -Newman, 1850

A perfoliate leaf is when there is a stem through the leaf.

Perfoliate Leaf

A perfoliate leaf is when there is a stem through the leaf.

"Connate.--Situated opposite each other, and joined at the base." -Newman, 1850

Connatum

"Connate.--Situated opposite each other, and joined at the base." -Newman, 1850

A clasping leaf around a stem.

Clasping Leaf

A clasping leaf around a stem.

"Anceps.--Two-edged." -Newman, 1850

Anceps

"Anceps.--Two-edged." -Newman, 1850

"Infundibuliformis.--Funnel form." -Newman, 1850

Infundibuliformis

"Infundibuliformis.--Funnel form." -Newman, 1850

A leaf pouch.

Pouch

A leaf pouch.

A seed pod, such as in peas.

Pod

A seed pod, such as in peas.

"Decurrent.--When leaves run down the stem to a point considerably below the place where they diverge from it." -Newman, 1850

Decurrent Leaf

"Decurrent.--When leaves run down the stem to a point considerably below the place where they diverge…

"Lanceolate.--Lance or spear-shaped, as in tulipa sylvestris." -Newman, 1850

Lanceolate Leaf

"Lanceolate.--Lance or spear-shaped, as in tulipa sylvestris." -Newman, 1850

"Elliptic.--Nearly oval, but of equal breadth at each end." -Newman, 1850

Elliptical Leaf

"Elliptic.--Nearly oval, but of equal breadth at each end." -Newman, 1850

A fiddle-shaped leaf.

Fiddle-Shaped Leaf

A fiddle-shaped leaf.

"Pinnate.--Term applied to a leaf when cut into many parallel segments, like the rose." -Newman, 1850

Pinnatifid

"Pinnate.--Term applied to a leaf when cut into many parallel segments, like the rose." -Newman, 1850

"Palmated.--Cut into oblong segments, so as to resemble a hand." -Newman, 1850

Palmate

"Palmated.--Cut into oblong segments, so as to resemble a hand." -Newman, 1850

A lobed leaf.

Lobed Leaf

A lobed leaf.

"Crenae.--Notches, or round teeth, bordering a leaf or the petals of a flower." -Newman, 1850

Crenated Leaf

"Crenae.--Notches, or round teeth, bordering a leaf or the petals of a flower." -Newman, 1850

A rhomboid or diamond-shaped leaf.

Rhomboid Leaf

A rhomboid or diamond-shaped leaf.

A triangular leaf.

Triangular Leaf

A triangular leaf.

An orbicular or circular leaf.

Orbicular Leaf

An orbicular or circular leaf.

An unequal leaf.

Unequal Leaf

An unequal leaf.

"Bipinnatifid.--Twice pinnatifid." -Newman, 1850

Bipinnatifid

"Bipinnatifid.--Twice pinnatifid." -Newman, 1850

"Imbricate.--When leaves are laid one over another, like tiles on a roof, they are said to be imbricated." -Newman, 1850

Imbricated Leaves

"Imbricate.--When leaves are laid one over another, like tiles on a roof, they are said to be imbricated."…

Spreading leaves.

Spreading Leaves

Spreading leaves.

"Lyrate.--Lyre-shaped: cut into many transverse segments, becoming larger towards the extremity of the leaf, which is rounded." -Newman, 1850

Lyrate Leaf

"Lyrate.--Lyre-shaped: cut into many transverse segments, becoming larger towards the extremity of the…

"Mucronate.--Sharply pointed." -Newman, 1850

Mucronate Leaf

"Mucronate.--Sharply pointed." -Newman, 1850

"Pinnate.--Term applied to a leaf when cut into many parallel segments, like the rose." -Newman, 1850

Pinnate

"Pinnate.--Term applied to a leaf when cut into many parallel segments, like the rose." -Newman, 1850

"Ternate.--Consisting of three leaflets." -Newman, 1850

Ternate Leaf

"Ternate.--Consisting of three leaflets." -Newman, 1850

"Stipulae.--Two small leaves, placed usually at the base of the floral leaf, and on opposite sides of the branch." -Newman, 1850

Stipule

"Stipulae.--Two small leaves, placed usually at the base of the floral leaf, and on opposite sides of…

An arrow-shaped leaf.

Arrow-Shaped Leaf

An arrow-shaped leaf.

"Serrated.--Edged with sharp teet, like those of a saw." -Newman, 1850

Serrated Leaf

"Serrated.--Edged with sharp teet, like those of a saw." -Newman, 1850

"Binate.--With two leaflets." -Newman, 1850

Binate

"Binate.--With two leaflets." -Newman, 1850

"Plicate.--Folded like a fan, or plaited." -Newman, 1850

Plaited Leaf

"Plicate.--Folded like a fan, or plaited." -Newman, 1850