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Of the Lobelia family (Lobeliaceae), the cardinal flower (Lobelia cardinalis).

Cardinal Flower

Of the Lobelia family (Lobeliaceae), the cardinal flower (Lobelia cardinalis).

Of the Composite family (Compositae), the oxeye (Heliopsis helianthoides).

Smooth Oxeye

Of the Composite family (Compositae), the oxeye (Heliopsis helianthoides).

Of the Composite family (Compositae), the purple cone-flower (Brauneria pallida).

Purple Cone-Flower

Of the Composite family (Compositae), the purple cone-flower (Brauneria pallida).

Of the Composite family (Compositae), the brown-eyed Susan (Rudbeckia triloba).

Brown-Eyed Susan

Of the Composite family (Compositae), the brown-eyed Susan (Rudbeckia triloba).

Of the Composite family (Compositae), the ten-petaled sunflower (Helianthus decapetalus).

Ten-Petaled Sunflower

Of the Composite family (Compositae), the ten-petaled sunflower (Helianthus decapetalus).

Of the Composite family (Compositae), the larger bur marigold (Bidens laevis).

Larger Bur Marigold

Of the Composite family (Compositae), the larger bur marigold (Bidens laevis).

Of the Composite family (Compositae), the smaller bur marigold (Bidens cernua).

Smaller Bur Marigold

Of the Composite family (Compositae), the smaller bur marigold (Bidens cernua).

Of the Composite family (Compositae), the arnica (Arnica mollis var. petiolaris).

Arnica

Of the Composite family (Compositae), the arnica (Arnica mollis var. petiolaris).

Of the Composite family (Compositae), the red-seeded dandelion (Taraxicum erythrospermum).

Red-Seeded Dandelion

Of the Composite family (Compositae), the red-seeded dandelion (Taraxicum erythrospermum).

Of the dayflower family (Commelina), the Asiatic dayflower (Commelina communis).

Asiatic Dayflower

Of the dayflower family (Commelina), the Asiatic dayflower (Commelina communis).

Of the dayflower family (Commelina), the slender dayflower (Commelina erecta).

Slender Dayflower

Of the dayflower family (Commelina), the slender dayflower (Commelina erecta).

Of the bellwort family (Uvularia), the perfoliate bellwort (Uvularia perfoliata).

Perfoliate Bellwort

Of the bellwort family (Uvularia), the perfoliate bellwort (Uvularia perfoliata).

Of the mud plantain family (Heteranthera), the blue mud plantain (Heteranthera limosa).

Blue Mud Plantain

Of the mud plantain family (Heteranthera), the blue mud plantain (Heteranthera limosa).

The Pogonia affinis.

Pogonia affinis

The Pogonia affinis.

The Pogonia divaricata or rosebud orchid.

Pogonia divaricata

The Pogonia divaricata or rosebud orchid.

The coffee senna or Cassia occidentalis.

Cassia occidentalis

The coffee senna or Cassia occidentalis.

"The dandelion; a so-called stemless plant." -Bergen, 1896

Dandelion

"The dandelion; a so-called stemless plant." -Bergen, 1896

"Rootstock of Cotton-Grass (Eriophorum)." -Bergen, 1896

Cottongrass

"Rootstock of Cotton-Grass (Eriophorum)." -Bergen, 1896

"Roots, rootstocks, and leaves of iris." -Bergen, 1896

Iris

"Roots, rootstocks, and leaves of iris." -Bergen, 1896

"Stem of "Smilax" (Myrsiphyllum). l, scale-like leaves; cl, cladophyll, or leaf-like branch, growing in the axil of the leaf; ped, flower-stalk, growing in the axil of a leaf." -Bergen, 1896

Smilax

"Stem of "Smilax" (Myrsiphyllum). l, scale-like leaves; cl, cladophyll, or leaf-like branch, growing…

"A, a pear leaf-bud in autumn; B, a leafy shoot derived from A, as seen in the middle of the following summer, with flower-bud at tip; C, the fruit-spur, B, in autumn, after the fall of the leaves." -Bergen, 1896

Pear Leaf-Bud

"A, a pear leaf-bud in autumn; B, a leafy shoot derived from A, as seen in the middle of the following…

"Fruit-bud of pear, showing its development. A, opening in spring; B, later, developing flowers and leaves; C, later still; only one flower has produced a fruit, the rest having fallen off. Below it is a lateral bud which will continue the spur next year." -Bergen, 1896

Pear Fruit-Bud

"Fruit-bud of pear, showing its development. A, opening in spring; B, later, developing flowers and…

"A slowly grown twig of cherry, three inches long and about ten years old. The pointed bud, l, is a leaf-bud; the more obtuse accessory buds, f, f, are flower-buds." -Bergen, 1896

Cherry Twig

"A slowly grown twig of cherry, three inches long and about ten years old. The pointed bud, l, is a…

"Palmately divided leaf of buttercup." -Bergen, 1896

Buttercup Leaf

"Palmately divided leaf of buttercup." -Bergen, 1896

"Leaf of pansy, with leaf-like stipules." -Bergen, 1896

Pansy Leaf

"Leaf of pansy, with leaf-like stipules." -Bergen, 1896

"Leaves standing nearly vertical in compass-plant. (Silphium laciniatum). A, view from east or west; B, from north or south." -Bergen, 1896

Compass Plant

"Leaves standing nearly vertical in compass-plant. (Silphium laciniatum). A, view from east or west;…

"Common Pitcher-Plant (Sarracenia purpurea). At the right one of the pitcher-like leaves is shown in cross-section." -Bergen, 1896

Common Pitcher Plant

"Common Pitcher-Plant (Sarracenia purpurea). At the right one of the pitcher-like leaves is shown in…

"The parts of the flower. cal, calyx; cor, corolla; st, stamens; p, pistil." -Bergen, 1896

Flower Parts

"The parts of the flower. cal, calyx; cor, corolla; st, stamens; p, pistil." -Bergen, 1896

"Apetalous flower of (European) wild ginger." -Bergen, 1896

Wild Ginger Flower

"Apetalous flower of (European) wild ginger." -Bergen, 1896

"Flower of stonecrop. I, entire flower. II, vertical section." -Bergen, 1896

Stonecrop Flower

"Flower of stonecrop. I, entire flower. II, vertical section." -Bergen, 1896

"Irregular corolla of sweet pea. A, side view; B, front view. s, standard; w, w, wings; k, keel." -Bergen, 1896

Sweet Pea Flower

"Irregular corolla of sweet pea. A, side view; B, front view. s, standard; w, w, wings; k, keel." -Bergen,…

"A rose, longitudinal section." -Bergen, 1896

Rose Section

"A rose, longitudinal section." -Bergen, 1896

"Flowers of willow. A, staminate flower; B, pistillate flower." -Bergen, 1896

Willow Flowers

"Flowers of willow. A, staminate flower; B, pistillate flower." -Bergen, 1896

"Bell-shaped corolla of bell-flower (Campanula)." -Bergen, 1896

Bellflower

"Bell-shaped corolla of bell-flower (Campanula)." -Bergen, 1896

"Salver-shaped corolla of jasmine." -Bergen, 1896

Jasmine Flower

"Salver-shaped corolla of jasmine." -Bergen, 1896

"Wheel-shaped corolla of potato." -Bergen, 1896

Potato Flower

"Wheel-shaped corolla of potato." -Bergen, 1896

"Tubular corolla, from head of bachelor's button." -Bergen, 1896

Cornflower

"Tubular corolla, from head of bachelor's button." -Bergen, 1896

"Labiate or ringent corolla of dead nettle." -Bergen, 1896

Deadnettle

"Labiate or ringent corolla of dead nettle." -Bergen, 1896

"Parts of a stamen. A, front; B, back. a, anther; c, connective; f, filament." -Bergen, 1896

Stamen Parts

"Parts of a stamen. A, front; B, back. a, anther; c, connective; f, filament." -Bergen, 1896

"Parts of the pistil. ov, ovary; sty, style; stig, stigma." -Bergen, 1896

Pistil Parts

"Parts of the pistil. ov, ovary; sty, style; stig, stigma." -Bergen, 1896

"Monadelphous stamens of mallow." -Bergen, 1896

Mallow Stamens

"Monadelphous stamens of mallow." -Bergen, 1896

"Stamens of a thistle, with anthers united into a ring. a, united anthers; f, filaments, bearded on the sides." -Bergen, 1896

Thistle Stamens

"Stamens of a thistle, with anthers united into a ring. a, united anthers; f, filaments, bearded on…

"Diadelphous stamens of sweet pea." -Bergen, 1896

Sweet Pea Stamens

"Diadelphous stamens of sweet pea." -Bergen, 1896

"White water-lily. The inner petals and the stamens growing from the ovary." -Bergen, 1896

White Waterlily

"White water-lily. The inner petals and the stamens growing from the ovary." -Bergen, 1896

"Transition from bracts to sepals in a cactus flower." -Bergen, 1896

Bracts to Sepals

"Transition from bracts to sepals in a cactus flower." -Bergen, 1896

"Transition from petals to stamens in white water-lily. E, F, G, H, various steps between petal and stamen." -Bergen, 1896

Petals to Stamens

"Transition from petals to stamens in white water-lily. E, F, G, H, various steps between petal and…

"Modes of discharging pollen. I, by longitudinal slits in the anther-cells (amaryllis); II, by uplifted valves (barberry); III, by a pore at the top of each anther-lobe (nightshade)." -Bergen, 1896

Pollen Discharge

"Modes of discharging pollen. I, by longitudinal slits in the anther-cells (amaryllis); II, by uplifted…

"Pollen grains. a, pumpkin; b, enchanter's nightshade; c, Albuca; d, pink; e, hibiscus." -Bergen, 1896

Pollen Grains

"Pollen grains. a, pumpkin; b, enchanter's nightshade; c, Albuca; d, pink; e, hibiscus." -Bergen, 1896

"Stigma of thorn-apple (Datura) with pollen." -Bergen, 1896

Stigma

"Stigma of thorn-apple (Datura) with pollen." -Bergen, 1896

"A beetle on the flower of the twayblade." -Bergen, 1896

Beetle on Flower

"A beetle on the flower of the twayblade." -Bergen, 1896

"Bees visiting flowers. At the left, a bumblebee on the flower of the dead nettle; below, a similar bee in the flower of the horse-chestnut; above, a honey-bee in the flower of a violet." -Bergen, 1896

Bees Visiting Flowers

"Bees visiting flowers. At the left, a bumblebee on the flower of the dead nettle; below, a similar…

"Flower of Clerodendron in two stages. In A (earlier stage) the stamens are mature, while the pistil is still undeveloped and bent to one side. In B (later stage) the stamens have withered and the stigmas have separated, ready for the reception of pollen." -Bergen, 1896

Clerodendron

"Flower of Clerodendron in two stages. In A (earlier stage) the stamens are mature, while the pistil…

"Two flowers of common sage, one of them visited by a bee." -Bergen, 1896

Common Sage

"Two flowers of common sage, one of them visited by a bee." -Bergen, 1896

"Dimorphous flowers of the primrose. I, a long-styled flower; II, a short-styled one." -Bergen, 1896

Primrose Flowers

"Dimorphous flowers of the primrose. I, a long-styled flower; II, a short-styled one." -Bergen, 1896

"A violet with cleistogamous flowers. The objects which look like flower-buds are cleistogamous flowers in various stages of development. The pods are the fruit of similar flowers. The plant is represented as it appears in late July or August, after the ordinary flowers have disappeared." -Bergen, 1896

Violet

"A violet with cleistogamous flowers. The objects which look like flower-buds are cleistogamous flowers…

"Akenes of a buttercup. A, head of akenes; B, section of a single akene. a, seed." -Bergen, 1896

Buttercup Akenes

"Akenes of a buttercup. A, head of akenes; B, section of a single akene. a, seed." -Bergen, 1896

"Group of follicles and a single follicle of the Monkshood." -Bergen, 1896

Follicles

"Group of follicles and a single follicle of the Monkshood." -Bergen, 1896

"A, Runcinate leaf of dandelion." -Bergen, 1896

Dandelion Leaf

"A, Runcinate leaf of dandelion." -Bergen, 1896

"Axillary and solitary flowers of pimpernel." -Bergen, 1896

Pimpernel Flowers

"Axillary and solitary flowers of pimpernel." -Bergen, 1896

"Raceme of common red currant. p, peduncle; p', pedicel; br, bract." -Bergen, 1896

Redcurrant Raceme

"Raceme of common red currant. p, peduncle; p', pedicel; br, bract." -Bergen, 1896