Seed of a Linden or Basswood cut through lengthwise, the parts lettered: <em>a</em>, the hilum or scar; <em>b</em>, the outer coat; <em>c</em>, the inner; <em>d</em>, the alhumen; <em>e</em>, the embryo.

Seed

Seed of a Linden or Basswood cut through lengthwise, the parts lettered: a, the hilum or scar;…

Open 4-valved spore-case of a Selaginella, and its four large spores (macrospores).

Selaginella

Open 4-valved spore-case of a Selaginella, and its four large spores (macrospores).

Macrospores of Selaginella

Selaginella

Macrospores of Selaginella

Macrospores of Selaginella, separated.

Selaginella

Macrospores of Selaginella, separated.

A bright brown fern with fronds reaching between 1 foot and 1.5 feet. They are commonly found in the East Indies.

Pteris Semipinnata

A bright brown fern with fronds reaching between 1 foot and 1.5 feet. They are commonly found in the…

"Flowering branch of Senna (Cassia obovata). a, a pod." -Whitney, 1911

Senna

"Flowering branch of Senna (Cassia obovata). a, a pod." -Whitney, 1911

The flowers and plant of Senna alexandrina which was once known as Cassia acutifolia.

Alexandrian Senna

The flowers and plant of Senna alexandrina which was once known as Cassia acutifolia.

"Wild senna (Cassia marilandica)." -Gager, 1916

Wild Senna

"Wild senna (Cassia marilandica)." -Gager, 1916

A member of the outermost circle of flower parts.

Sepal

A member of the outermost circle of flower parts.

Also known as Ulmus serotina. A branch of a September Elm tree, native to a select few states in North America.

Branch of September Elm

Also known as Ulmus serotina. A branch of a September Elm tree, native to a select few states in North…

Toothed like a saw.

Serrate

Toothed like a saw.

This coffee service is covered with an open honey comb design. It has handles formed of wheat ears, stalks and leaves.

Coffee Service

This coffee service is covered with an open honey comb design. It has handles formed of wheat ears,…

"Sesamum indicum. 1. a ripe fruit; 2. one of its halves; 3. a seed; 4. a cross section of it." -Lindley, 1853

Sesame

"Sesamum indicum. 1. a ripe fruit; 2. one of its halves; 3. a seed; 4. a cross section of it." -Lindley,…

This lace shawl was made using a "pusher bobbin net machine". The design is made of small delicate flowers and leaves.

Lace Shawl

This lace shawl was made using a "pusher bobbin net machine". The design is made of small delicate flowers…

A shrub with leaves with expanded blades.

Shrub

A shrub with leaves with expanded blades.

Shrub

Shrub

Shrub

"Branch of Simarouba amara, with female flowers. a, a male flower; b, a female flower." -Whitney, 1911

Simarouba

"Branch of Simarouba amara, with female flowers. a, a male flower; b, a female flower." -Whitney, 1911

Diagram of a simple cyme in which the axis lengthens, so as to take the form of a raceme.

Simple cyme

Diagram of a simple cyme in which the axis lengthens, so as to take the form of a raceme.

A cleft or recess between two lobes.

Sinus

A cleft or recess between two lobes.

Also known as Salix sitchensis. The branch of a Sitka Willow tree, native to northwestern North America.

Branch of Sitka Willow

Also known as Salix sitchensis. The branch of a Sitka Willow tree, native to northwestern North America.

These are the fruit, or samara, of Slippery Elm, Ulmus pubescens, (Keeler, 1915).

Slippery Elm Fruit

These are the fruit, or samara, of Slippery Elm, Ulmus pubescens, (Keeler, 1915).

"Germinating seed of Ophiocaryon paradoxum. a. radicle; b. cauliculus; cc. cotyledons." -Lindley, 1853

Snakenut

"Germinating seed of Ophiocaryon paradoxum. a. radicle; b. cauliculus; cc. cotyledons." -Lindley, 1853

"Flowering plant of sanicle (Sanicula marilandica). (a), a male flower; (b), the fruit." -Whitney, 1911

Maryland Black Snakeroot

"Flowering plant of sanicle (Sanicula marilandica). (a), a male flower; (b), the fruit." -Whitney, 1911

"Sapindus senegalensis. 1. an expanded flower; 2. a petal; 3. the ovaries before fertilisation; 4. a vertical section of a ripe drupe, showing the embryo." -Lindley, 1853

Soapberry

"Sapindus senegalensis. 1. an expanded flower; 2. a petal; 3. the ovaries before fertilisation; 4. a…

"Branch with fruits of Sapindus drummondi. a, a flower." -Whitney, 1911

Western Soapberry

"Branch with fruits of Sapindus drummondi. a, a flower." -Whitney, 1911

Leaves of Solanum jasminoides, the petiole adapted for climbing.

Solanum Jasminoides

Leaves of Solanum jasminoides, the petiole adapted for climbing.

This shows two leaves of Spanish Oak, Quercus digitata, (Keeler, 1915).

Spanish Oak Leaves

This shows two leaves of Spanish Oak, Quercus digitata, (Keeler, 1915).

Leaf-like structure more or less enclosing a fleshy inflorescence, particularly in the Araceae.

Spathe

Leaf-like structure more or less enclosing a fleshy inflorescence, particularly in the Araceae.

Pertains to shape.

Spatulate

Pertains to shape.

Of the spiderwort family (Tradescantia), clockwise from top: T. bracteata, T. pilosa, T. montana, T. brevicaulis, T. occidentalis, T. reflexa.

Spiderwort

Of the spiderwort family (Tradescantia), clockwise from top: T. bracteata, T. pilosa, T. montana, T.…

A flower cluster with flowers sessile along a common more or less elongated axis.

Spike

A flower cluster with flowers sessile along a common more or less elongated axis.

"Euonymus europaeus. 1. a section of a fruit; 2. a seed enveloped in its aril; 3. a perpendicular section of a seed." -Lindley, 1853

European Spindle

"Euonymus europaeus. 1. a section of a fruit; 2. a seed enveloped in its aril; 3. a perpendicular section…

Opposite leaves of Euonymus, or Spindle-tree, showing the successive pairs crossing each other at right angles.

Spindle-tree

Opposite leaves of Euonymus, or Spindle-tree, showing the successive pairs crossing each other at right…

The Leaf of Akanthos Spinosus has pointed lobes terminating in spines and narrow leaves.

Leaf of Akanthos Mollis

The Leaf of Akanthos Spinosus has pointed lobes terminating in spines and narrow leaves.

An image of spores.

Spores

An image of spores.

The Ivy Spray has broad-lobed leaves.

Ivy Spray

The Ivy Spray has broad-lobed leaves.

This Ivy Spray has elliptic tapering leaves that are apparent after blooming.

Ivy Spray

This Ivy Spray has elliptic tapering leaves that are apparent after blooming.

This Ivy Spray has lanceolate leaves.

Ivy Spray

This Ivy Spray has lanceolate leaves.

A hollow sac-like or tubular extension of some part of a flower.

Spur

A hollow sac-like or tubular extension of some part of a flower.

A squirrel hiding in a tree from the rain.

Squirrel

A squirrel hiding in a tree from the rain.

Seed of a St. John's-wort, divided lengthwise; here the whole kernel is embryo.

St. John's-wort

Seed of a St. John's-wort, divided lengthwise; here the whole kernel is embryo.

The pollen bearing organ of the flower.

Stamen

The pollen bearing organ of the flower.

Stamen with the usual dehiscence of anther down the side of each cell.

Stamen

Stamen with the usual dehiscence of anther down the side of each cell.

This flower stand is decorated with leaves. It is used to display flowers.

Flower Stand

This flower stand is decorated with leaves. It is used to display flowers.

This vase with stand is a maltese design. The stand has a simple design of leaves. The vase has a handle on each side, and a grape vine design on its center body.

Vase with Stand

This vase with stand is a maltese design. The stand has a simple design of leaves. The vase has a handle…

Stem of a potato plant.

Stem

Stem of a potato plant.

Piece of thallus of a Sticta, with section, showing the immersed apothecia; the small openings of these dot the surface.

Sticta

Piece of thallus of a Sticta, with section, showing the immersed apothecia; the small openings of these…

The sticky portion of the pistil, usually terminal, upon which the pollen is deposited.

Stigma

The sticky portion of the pistil, usually terminal, upon which the pollen is deposited.

A wide-creeping fern with reddish-brown scales. The fronds of this fern are approximately 2 feet in length, and 1 to 3 inches broad.

Polypodium Stigmaticum

A wide-creeping fern with reddish-brown scales. The fronds of this fern are approximately 2 feet in…

An appendage at the base of the petiole of a leaf; normally occuring in pairs.

Stipule

An appendage at the base of the petiole of a leaf; normally occuring in pairs.

The evolute spiral stove tile is a painting during the German Renaissance. It is a wavelike pattern that mimics the waves of the sea. The interstices (small opening) between the lines is decorated with leaves and flower buds.

Evolute Spiral Stove Tile

The evolute spiral stove tile is a painting during the German Renaissance. It is a wavelike pattern…

Longitudinal section of a young strawberry.

Strawberry

Longitudinal section of a young strawberry.

Section of a part of a strawberry

Strawberry

Section of a part of a strawberry

"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…

Somewhat heart shaped.

Subcordate

Somewhat heart shaped.

Shaped like an awl.

subulate

Shaped like an awl.

"Drosera rotundifolia. 1. a flower; 2. a perpendicular section of the ovary; 3. a perpendicular section of a seed." -Lindley, 1853

Common Sundew

"Drosera rotundifolia. 1. a flower; 2. a perpendicular section of the ovary; 3. a perpendicular section…

This shows the leaf of the Swamp Cottonwood, Populus heterophylla, (Keeler, 1915).

Swamp Cottonwood Leaf

This shows the leaf of the Swamp Cottonwood, Populus heterophylla, (Keeler, 1915).

Also known as Quercus palustris. A species of red oak tree native to eastern United States.

Branch of Swamp Spanish Oak

Also known as Quercus palustris. A species of red oak tree native to eastern United States.

Also known as Betula lenta. A species of birch native to eastern North America.

Branch of Sweet Birch

Also known as Betula lenta. A species of birch native to eastern North America.