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Achene exposed.

Scleria

Achene exposed.

calyx of flower bearing a crest above.

Scutellaria

calyx of flower bearing a crest above.

An illustration of a sea fern fossil from the carboniferous period. The Carboniferous is a geologic period and system that extends from the end of the Devonian period, about 359.2 ± 2.5 Ma (million years ago), to the beginning of the Permian period, about 299.0 ± 0.8 Ma.

Sea Fern Fossil

An illustration of a sea fern fossil from the carboniferous period. The Carboniferous is a geologic…

Also known as Coccolobis uvifera. A branch of a Sea Grape plant, native throughout tropical America and the Caribbean.

Branch of Sea Grape

Also known as Coccolobis uvifera. A branch of a Sea Grape plant, native throughout tropical America…

"Sea lavender (<em>statice limonium</em>) is a native British plant, being fairly common in certain parts of the coast."&mdash;Finley, 1917

Sea lavender

"Sea lavender (statice limonium) is a native British plant, being fairly common in certain…

The Sea-Fir (Sertularia tubitheca) is mistaken as a plant but is actual a hydrozoan animal of the phylum Cnidaria.

Sea-Fir

The Sea-Fir (Sertularia tubitheca) is mistaken as a plant but is actual a hydrozoan animal of the phylum…

An illustration of a sea-lily fossil.

Sea-lily

An illustration of a sea-lily fossil.

1. Sea-plantain. 2. Sea-pink 3. Sea-reed, 4. Sea Rocket, 5. Sea Campion, 6. Sea-holly 7. Sea-spurge 8. Stone-pop

Types of Seashore Life

1. Sea-plantain. 2. Sea-pink 3. Sea-reed, 4. Sea Rocket, 5. Sea Campion, 6. Sea-holly 7. Sea-spurge…

Also known as Alnus maritima. The branch of a Seaside Alder, native to the United States.

Branch of Seaside Alder

Also known as Alnus maritima. The branch of a Seaside Alder, native to the United States.

"Uricle or addiional glumes of Carex rivularis" (Shining Flatsedge) -Lindley, 1853

Shining Flatsedge

"Uricle or addiional glumes of Carex rivularis" (Shining Flatsedge) -Lindley, 1853

An illustration of a sedge plant.

Sedge Plant

An illustration of a sedge plant.

3, The Fox Sedge (Carex vulpinoidea) and 4, the Fringed Sedge (Carex crinita).

Fox Sedge and Fringed Sedge

3, The Fox Sedge (Carex vulpinoidea) and 4, the Fringed Sedge (Carex crinita).

The Northern Singlespike Sedge (Carex scirpoidea): 1, male; 2, female.

Northern Singlespike

The Northern Singlespike Sedge (Carex scirpoidea): 1, male; 2, female.

"Leaf of a live-forever (Sedum sp.), with a portion of the epidermis peeled back. Underneath the epidermis is the mesophyll." -Gager, 1916

Sedum Leaf

"Leaf of a live-forever (Sedum sp.), with a portion of the epidermis peeled back. Underneath the epidermis…

Plant which belongs to the sedum family.

Plant of Sedum

Plant which belongs to the sedum family.

One stage of growth seen in a wild oats seedling.

Wild Oats Seedling

One stage of growth seen in a wild oats seedling.

A growth stage of a wild oats seedling, showing later growth.

Wild Oats Seedlng

A growth stage of a wild oats seedling, showing later growth.

"Seeds cut vertically, showing their Embryos and Albumen."-Whitney, 1902

Seeds

"Seeds cut vertically, showing their Embryos and Albumen."-Whitney, 1902

"Selago distans. 1. a flower; 2. an anther; 3. a perpendicular section of an ovary; 4. section of seed of Microdon ovatum." -Lindley, 1853

Selago

"Selago distans. 1. a flower; 2. an anther; 3. a perpendicular section of an ovary; 4. section of seed…

Selerolepis

Selerolepis

Selerolepis

"Self-heal. (Prunella vulgaris). The upper part of the stem with flowers. a, the calyx; b, the corolla; c, a leaf; d, a bract from the inflorescence." -Whitney, 1911

Self-Heal

"Self-heal. (Prunella vulgaris). The upper part of the stem with flowers. a, the calyx; b, the corolla;…

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…

<em>Senecio vulgaris</em>, a member of the genus senecio.

Senecio

Senecio vulgaris, a member of the genus senecio.

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.

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…

The branch of a Serenoa arborescens, a species of palm tree.

Branch of Serenoa Arborescens

The branch of a Serenoa arborescens, a species of palm tree.

Toothed like a saw.

Serrate

Toothed like a saw.

A branch of the Canadian Serviceberry (Amelanchier canadensis), a shrub or small tree, showing fruit.

Canadian Serviceberry

A branch of the Canadian Serviceberry (Amelanchier canadensis), a shrub or small tree, showing fruit.

A branch of the Canadian Serviceberry (Amelanchier canadensis), a shrub or small tree, showing flowers.

Canadian Serviceberry

A branch of the Canadian Serviceberry (Amelanchier canadensis), a shrub or small tree, showing flowers.

"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,…

The Sesame (Sesamum orientale, Sesamum indicum) is a flowering plant in the Pedaliaceae family of pedaliums or sesames used for its edible seeds and oil.

Sesame

The Sesame (Sesamum orientale, Sesamum indicum) is a flowering plant in the Pedaliaceae family of pedaliums…

Spikelets spineless (awnless) but subtended by several bristles; panicle often nodding.

Setaria

Spikelets spineless (awnless) but subtended by several bristles; panicle often nodding.

"Mr. Seymour's form approaches more nearly to the French method than any other practised in England, but the direct channel of the sap is not suppressed. It will be seen that the bearing shoots are all on the upper side of the mother branches, and that these bearing shoots are wholly reproduced once a year." &mdash; Encyclopedia Britannica, 1893

Seymour's Fan

"Mr. Seymour's form approaches more nearly to the French method than any other practised in England,…

Also known as Hicoria ovata. The branch of a Shagbark Hickory tree, native to the eastern United States.

Branch of Shagbark Hickory

Also known as Hicoria ovata. The branch of a Shagbark Hickory tree, native to the eastern United States.

Also known as Quercus breviloba. The branch of a Shallow-lobed Oak tree, native to the southern United States and northern Mexico.

Branch of Shallow-Lobed Oak

Also known as Quercus breviloba. The branch of a Shallow-lobed Oak tree, native to the southern United…

"The national emblem of Ireland, is a plant with a leaf formed from three leaflets. It is thought to be the wood-sorrel, a native of Ireland, by some, and by others the name is given to the bird's-foot trefoil." &mdash; Beach, 1900

Shamrock

"The national emblem of Ireland, is a plant with a leaf formed from three leaflets. It is thought to…

Also known as Cupressus macnabiana.

Branch of Shasta Cypress

Also known as Cupressus macnabiana.

Also known as Abies magnifica var. shastensis.

Pine Cone of Shasta Red Fir

Also known as Abies magnifica var. shastensis.

A window shelf for holding plants. They can be used either indoors or outdoors.

Window Shelf

A window shelf for holding plants. They can be used either indoors or outdoors.

"A common cruciferous plant, the size of which varies from a few inches to a few feet."&mdash;Finley, 1917

Shepherd's purse

"A common cruciferous plant, the size of which varies from a few inches to a few feet."—Finley,…

"Plant with Flowers and Fruits of Shepherd's-purse" (Capsella bursa-pastoris) "a, flower; b, a pod." -Whitney, 1911

Shepherd's Purse

"Plant with Flowers and Fruits of Shepherd's-purse" (Capsella bursa-pastoris) "a, flower; b, a pod."…

Also known as Quercus imbricaria. The branch of a Shingle Oak tree, native primarily to the midwestern North American regions.

Branch of Shingle Oak

Also known as Quercus imbricaria. The branch of a Shingle Oak tree, native primarily to the midwestern…

Also known as Pinus echinata. The pine cone of a Shortleaf Pine tree.

Pine Cone of Shortleaf Pine

Also known as Pinus echinata. The pine cone of a Shortleaf Pine tree.

A shrub with leaves with expanded blades.

Shrub

A shrub with leaves with expanded blades.

Shrub

Shrub

Shrub

Grafting is a horticultural operation which consists in placing together the two cut surfaces of different plants in such a way that they shall unite and become an organic unity. The rooted plant which is to receive the graft is called the 'stock'; the cutting which is to be applied to the stock, and to obtain its nourishment from it, is called the 'scion'. This illustration shows the Side Grafting method.

Side Grafting

Grafting is a horticultural operation which consists in placing together the two cut surfaces of different…

Unguiculate (clawed) petal of a Silene; with a two parted crown.

Silene

Unguiculate (clawed) petal of a Silene; with a two parted crown.

Longitudinal section of flower of Silene Pennsylvanica, showing stipe between calyx and corolla.

Silene Pennsylvanica

Longitudinal section of flower of Silene Pennsylvanica, showing stipe between calyx and corolla.

"Silicles. 1. Of Shepherd's-purse (Bursa Bursa-pastoris). 2. Same, opened, to show the placentae, the seeds, and the two valves. 3. Of Vernal Whitlow-grass, Draba verna. 4. Same, opened, to show the valves, the dissepiment, and the seeds." -Whitney, 1911

Silicles

"Silicles. 1. Of Shepherd's-purse (Bursa Bursa-pastoris). 2. Same, opened, to show the placentae, the…

"Silique, the fruit of certain cruciferous plants, consisting of a pair of valves which seperate from a central septum"&mdash;Finley, 1917

Silique

"Silique, the fruit of certain cruciferous plants, consisting of a pair of valves which seperate from…

"Siliques. 1. Of Cardamine bulbosa. 2. Of Raphanus Raphanistrum. 3. Of Heliophila crithmifolia." -Whitney, 1911

Siliques

"Siliques. 1. Of Cardamine bulbosa. 2. Of Raphanus Raphanistrum. 3. Of Heliophila crithmifolia." -Whitney,…

The Silver Fern (Cyathea dealbata) is a plant in the Cyatheaceae family of tree ferns. It was also known as the synonym Gymnogramme tartarea.

Silver Fern

The Silver Fern (Cyathea dealbata) is a plant in the Cyatheaceae family of tree ferns. It was also known…

Also known as Albies alba.

Pine Cone of Silver Fir

Also known as Albies alba.

"Halesia tetraptera. 1. its fruit; 2. a perpendicular; 3. a transverse, section of it." -Lindley, 1853

Carolina Silverbell

"Halesia tetraptera. 1. its fruit; 2. a perpendicular; 3. a transverse, section of it." -Lindley, 1853

"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

Also known as Pinus monophylla. The pine cone of a Single-leaf Pinyon.

Pine Cone of Single-Leaf Pinyon

Also known as Pinus monophylla. The pine cone of a Single-leaf Pinyon.

A cleft or recess between two lobes.

Sinus

A cleft or recess between two lobes.

Sisal or sisal hemp is an agave Agave sisalana that yields a stiff fiber used in making rope. (The term may refer either to the plant or the fiber, depending on context.) It is not really a variety of hemp, but named so because hemp was for centuries a major source for fiber, so other fibers were sometimes named after it.

Sisal Hemp

Sisal or sisal hemp is an agave Agave sisalana that yields a stiff fiber used in making rope. (The term…

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.