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"Ruyschia amazonica. 1. a calyx and pistil; 2. a section of the ovary; 3. a seed; 4. the same, with a portion of the testa torn open to show the cotyledons." -Lindley, 1853

Ruyschia

"Ruyschia amazonica. 1. a calyx and pistil; 2. a section of the ovary; 3. a seed; 4. the same, with…

Flowers white, or, if pink, with a yellow or green eye in the center.

Sabatia

Flowers white, or, if pink, with a yellow or green eye in the center.

Of the Gentian family (Gentianaceae), the Sabbatia gracilis.

Sabbatia gracilis

Of the Gentian family (Gentianaceae), the Sabbatia gracilis.

A pink flower that typically blooms in June. The elliptical leaves are dark green, with silver specks that give it a marbled appearance. They are usually found in Europe.

Pulmonaria Saccharata

A pink flower that typically blooms in June. The elliptical leaves are dark green, with silver specks…

Spikelets inflated or gibbous at base.

Sacciolepis

Spikelets inflated or gibbous at base.

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 Saddle method of grafting.

Saddle Grafting

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

"1. Salva officinalis; 2. its corolla laid open; 3. its pistil; 4. the pistil and lower part of the flower cut open; 5. perpendicular section of a nut." -Lindley, 1853

Common Sage

"1. Salva officinalis; 2. its corolla laid open; 3. its pistil; 4. the pistil and lower part of the…

"Pasture Sage-brush (Artemisia frigida). a, leaf; b, flower-head; c, fertile flower; d, marginal flower." -Whitney, 1911

Sagebrush

"Pasture Sage-brush (Artemisia frigida). a, leaf; b, flower-head; c, fertile flower; d, marginal flower."…

Leaves from base of scape bearing evident white flowers in racemes; roots without crss-constrictions.

Sagittaria

Leaves from base of scape bearing evident white flowers in racemes; roots without crss-constrictions.

lowest flowers with only carpels, or with only stamens.

Sagittaria

lowest flowers with only carpels, or with only stamens.

Like an arrowhead, with the lobes turned downward.

Sagittate

Like an arrowhead, with the lobes turned downward.

An arrow-fronded fern with blackish, long leaves. They are common between Venezuela and Brazil.

Pteris Sagittifolia

An arrow-fronded fern with blackish, long leaves. They are common between Venezuela and Brazil.

Cycas revoluta or sago cycad is known as the king sago palm but is not a palm; it is a cycad.

Sago Cycad

Cycas revoluta or sago cycad is known as the king sago palm but is not a palm; it is a cycad.

"Cycas circinalis; 1. a portion of a female frond; 2. section of the naked ovule; 3. ripe fruit; 4. embryo." -Lindley, 1853

Queen Sago

"Cycas circinalis; 1. a portion of a female frond; 2. section of the naked ovule; 3. ripe fruit; 4.…

Leaves over four times as long as broad.

Salix

Leaves over four times as long as broad.

The branch of a Salix amplifolia, a species of willow.

Branch of Salix Amplifolia

The branch of a Salix amplifolia, a species of willow.

The branch of a Salix balsamifera tree, a species of willow.

Branch of Salix Balsamifera

The branch of a Salix balsamifera tree, a species of willow.

The branch of a Salix fluviatilis, a species of willow tree.

Branch of Salix Fluviatilis

The branch of a Salix fluviatilis, a species of willow tree.

The branch of a Salix longipes tree, a species of willow.

Branch of Salix Longipes

The branch of a Salix longipes tree, a species of willow.

The branch of a Salix nuttallii, a species of willow.

Branch of Salix Nuttallii

The branch of a Salix nuttallii, a species of willow.

The branch of a Salix sesillilifolia, a species of willow.

Branch of Salix Sesillilifolia

The branch of a Salix sesillilifolia, a species of willow.

"3. a flower of Salsola Kali; 4. its ripe fruit; 5. the same magnified, with a portion of the leafy dilated calyx torn away; 6. it embryo." -Lindley, 1853

Prickly Saltwort

"3. a flower of Salsola Kali; 4. its ripe fruit; 5. the same magnified, with a portion of the leafy…

<i>Salsola kali</i>. This plant is also called a Russian Thistle, Prickly Glasswort, Tumbleweed, and Glasswort. It is a member of the amaranth family and is an annually growing herb. It has a bushy stem with many branches. It produces a small, white flower. It is native on sea beaches in Europe, western Asia, North and South America, and Australia.

Prickly Saltwort

Salsola kali. This plant is also called a Russian Thistle, Prickly Glasswort, Tumbleweed, and Glasswort.…

"Salvertia convallariodora. 1. an expanded flower; 2. a portion of the calyx, with the stamens; 3. a pistil; 4. a transverse section of the ovary." -Lindley, 1853

Salvertia

"Salvertia convallariodora. 1. an expanded flower; 2. a portion of the calyx, with the stamens; 3. a…

Leaves not over twice as long as broad.

Samalus

Leaves not over twice as long as broad.

"Upper part of stem with the inflorescence of Samphire (Crithmum maritimum). (a), a flower; (b), the fruit; (c), transverse section of one of the fruitlets." -Whitney, 1911

Rock Samphire

"Upper part of stem with the inflorescence of Samphire (Crithmum maritimum). (a), a flower; (b), the…

Also known as Salix cordata. The branch of a Sand Dune Willow, native to northeast North America.

Branch of Sand Dune Willow

Also known as Salix cordata. The branch of a Sand Dune Willow, native to northeast North America.

Santalum album is a small tropical tree cultivated for its fragrant oil and medicinal uses.

Indian Sandalwood

Santalum album is a small tropical tree cultivated for its fragrant oil and medicinal uses.

Callitris quadrivalvis (or Tetraclinis articulata) is a coniferous tree in the cypress family known as the Sandarac.

Sandarac Tree

Callitris quadrivalvis (or Tetraclinis articulata) is a coniferous tree in the cypress family known…

The fruit of Hura crepitans, the sandbox tree.

Sandbox Tree

The fruit of Hura crepitans, the sandbox tree.

The fruit of the Sandbox Tree (Hura crepitans).

Sandbox Tree Fruit

The fruit of the Sandbox Tree (Hura crepitans).

"Thyme-leaved Sandwort (Arenaria serpyllifolia). a, capsule surrounded by the scarious calyx; b, expanded flower." -Whitney, 1911

Thyme-Leaved Sandwort

"Thyme-leaved Sandwort (Arenaria serpyllifolia). a, capsule surrounded by the scarious calyx; b, expanded…

"Sapodilla (Sapota zapotilla). (a), the fruit; (b), the same, transversely cut." -Whitney, 1911

Sapodilla

"Sapodilla (Sapota zapotilla). (a), the fruit; (b), the same, transversely cut." -Whitney, 1911

Sarcocolla vulgaris, a flowering plant from the Penaeaceae family.

Sarcocolla

Sarcocolla vulgaris, a flowering plant from the Penaeaceae family.

"In 1870, Saxafraga sarmentosa was introduced, being beautifully and more distinctly variegated with white and rose colored markings on the leaves, but it is apt to run back to the original species."&mdash;Heinrich, 1887

Saxafraga Sarmentosa

"In 1870, Saxafraga sarmentosa was introduced, being beautifully and more distinctly variegated with…

"Branch of Sarsaparilla (Smilax medica), with fruits." -Whitney, 1911

Sarsaparilla

"Branch of Sarsaparilla (Smilax medica), with fruits." -Whitney, 1911

"Smilax glycyphylla; 1. a male flower seen from above; 2. a female flower; 3. a transverse section of an ovary; 4. a seed; 5. a section of a seed, showing the embryo." -Lindley, 1853

Sweet Sarsaparilla

"Smilax glycyphylla; 1. a male flower seen from above; 2. a female flower; 3. a transverse section of…

Also known as Amelanchier alnifolia. The branch of a Saskatoon shrub, native to North America, primarily from Alaska to Western Canada.

Branch of Saskatoon

Also known as Amelanchier alnifolia. The branch of a Saskatoon shrub, native to North America, primarily…

"Sassafras (Sassafras sassafras). 1. Branch with fruits. 2. Branch with sterile flowers. a, b, c, different forms of leaves." -Whitney, 1911

Sassafras

"Sassafras (Sassafras sassafras). 1. Branch with fruits. 2. Branch with sterile flowers. a, b, c, different…

A branch of a Sassafras plant, native to eastern North America.

Branch of Sassafras

A branch of a Sassafras plant, native to eastern North America.

Stems with no sheaths; flowers white, fragrant.

Saururus

Stems with no sheaths; flowers white, fragrant.

"Lavradia Vellozii. 1. an expanded flower; 2. the stamens with exterior petaloid scales; 3. a seed; 4. a section of it." -Lindley, 1853

Sauvagesia

"Lavradia Vellozii. 1. an expanded flower; 2. the stamens with exterior petaloid scales; 3. a seed;…

Also known as Juniperus sabina. A species of juniper native to central and southern Europe, as well as western and central Asia.

Branch of Savin Juniper

Also known as Juniperus sabina. A species of juniper native to central and southern Europe, as well…

The Summer Savory (Satureja hortensis) is a flowering plant of the Lamiaceae family. The image shows its: a, corolla; b, calyx; and c, pistil.

Summer Savory

The Summer Savory (Satureja hortensis) is a flowering plant of the Lamiaceae family. The image shows…

"The Savoy cabbages have wrinkled leaves and have a peculiar flavor that is much liked by most people. They are improved in quality by a slight touch of frost."&mdash;Rawson, 1892

Globe Curled Savoy

"The Savoy cabbages have wrinkled leaves and have a peculiar flavor that is much liked by most people.…

Also known as Nematus ribesii. A common pest of gooseberries.

Gooseberry Sawfly

Also known as Nematus ribesii. A common pest of gooseberries.

"Strawberry False-worm (Emphytus maculatus). 1, 2 pupa, ventral and lateral views (line shows natural size); 3, fly, enlarged (wings on one side detached); 4, larva; 5, fly with wings closed; 6, larva curled up; 7, coccoon; 8, antenna; 9, egg. (4, 5, 6, and 7 natural size; 8 and 9 enlarged.)" -Whitney, 1911

Strawberry Sawfly

"Strawberry False-worm (Emphytus maculatus). 1, 2 pupa, ventral and lateral views (line shows natural…

This perennial herb mainly survives in the cold climate of the arctic.

Garden Saxifragas

This perennial herb mainly survives in the cold climate of the arctic.

"Flowering plant of saxifrage (Saxifraga virginiensis). a, a flower; b, the fruit." -Whitney, 1911

Early Saxifrage

"Flowering plant of saxifrage (Saxifraga virginiensis). a, a flower; b, the fruit." -Whitney, 1911

A wide-creeping fern with long reddish-brown fronds, which grow to be approximately 1 foot in length. They are usually found in New Zealand.

Pteris Scaberula

A wide-creeping fern with long reddish-brown fronds, which grow to be approximately 1 foot in length.…

"Scabiosa atropurpurea. 1. a flower; 2. the involucre opened to show the ovary and calyx; 3. perpendicular section of fruit." -Lindley, 1853

Sweet Scabious

"Scabiosa atropurpurea. 1. a flower; 2. the involucre opened to show the ovary and calyx; 3. perpendicular…

"This is a drooping or creeping species, with light green, glossy leaves and large clusters of orange salmon-colored flowers."&mdash;Heinrich, 1887

Begnia Glaucophylla Scandens

"This is a drooping or creeping species, with light green, glossy leaves and large clusters of orange…

A scape is a flowering, leafless stem; shown here on two different plants. "1. Wild hyacinth (Scilla nonscripta). 2. Oxlip (Primula elatior). s, s, scapes." -Whitney, 1911

Scapes

A scape is a flowering, leafless stem; shown here on two different plants. "1. Wild hyacinth (Scilla…

Also known as Quercus coccinea. The branch of a red oak tree native to the eastern United States.

Branch of Scarlet Oak

Also known as Quercus coccinea. The branch of a red oak tree native to the eastern United States.

The spore-case of Schizaea dichotoma, a fern from the Polypodiaceae family.

Schizaea

The spore-case of Schizaea dichotoma, a fern from the Polypodiaceae family.

"Schubertia multiflora. 1. the anthers united to the stigma; 2. the ovary and stigma, from the latter of which the pollen masses have been removed; 3. a pair of pendulous pollen masses, with their gland; 4. the ripe follicles." -Lindley, 1853

Schubertia

"Schubertia multiflora. 1. the anthers united to the stigma; 2. the ovary and stigma, from the latter…

"A genus of Old World bulbous plants belonging to the order Lilac&aelig;." &mdash;Finley, 1917

Scilla

"A genus of Old World bulbous plants belonging to the order Lilacæ." —Finley, 1917

A white flower with stripes of blue down the center. It typically blooms in the Spring, and is found in Asia and the Middle East. The leaves grow in twos, and are strap-like.

Puschkinia Scilloides

A white flower with stripes of blue down the center. It typically blooms in the Spring, and is found…

Flwers or fruits hidden by overlapping scales.

Scirpus

Flwers or fruits hidden by overlapping scales.

Style not swollen as base.

Scirpus

Style not swollen as base.