ClipArt ETC
"A branch of hemlock bearing leaves and cones." -University Society, 1920

Hemlock Branch

"A branch of hemlock bearing leaves and cones." -University Society, 1920

The fruit and leaves of a beech tree.

Beech Fruit and Leaves

The fruit and leaves of a beech tree.

The flowers and leaves of a chestnut tree.

Chestnut Leaves

The flowers and leaves of a chestnut tree.

The leaf of a chestnut tree.

Chestnut Leaf

The leaf of a chestnut tree.

The leaf of a chestnut-oak tree.

Chestnut-Oak Leaf

The leaf of a chestnut-oak tree.

The leaf of a white oak tree.

White Oak Leaf

The leaf of a white oak tree.

The leaf of a red oak tree.

Red Oak Leaf

The leaf of a red oak tree.

The leaf of a post-oak tree.

Post-Oak Leaf

The leaf of a post-oak tree.

The leaf of a live-oak tree.

Live-Oak Leaf

The leaf of a live-oak tree.

The leaf of a mossy-cup oak tree.

Mossy-Cup Oak Leaf

The leaf of a mossy-cup oak tree.

The leaf of a white oak tree.

White Oak Leaf

The leaf of a white oak tree.

The leaf of a scarlet oak tree.

Scarlet Oak Leaf

The leaf of a scarlet oak tree.

The leaf of a pin-oak tree.

Pin-Oak Leaf

The leaf of a pin-oak tree.

The leaf of a English oak tree.

English Oak Leaf

The leaf of a English oak tree.

The leaf of a Black-jack oak tree.

Black-Jack Oak Leaf

The leaf of a Black-jack oak tree.

The leaf of a Black oak tree.

Black Oak Leaf

The leaf of a Black oak tree.

The leaf of a laurel-oak tree.

Laurel-Oak Leaf

The leaf of a laurel-oak tree.

The leaf of a willow-oak tree.

Willow-Oak Leaf

The leaf of a willow-oak tree.

"Buds, leaves, flowers, and fruit of American Elm." -University Society, 1920

Elm Leaves

"Buds, leaves, flowers, and fruit of American Elm." -University Society, 1920

The leaves and fruit of the wild black cherry tree.

Wild Black Cherry

The leaves and fruit of the wild black cherry tree.

The leaves and fruit of the American Holly.

Holly

The leaves and fruit of the American Holly.

The leaf of a Norway Maple tree.

Norway Maple

The leaf of a Norway Maple tree.

The leaf of a Japanese Maple tree.

Japanese Maple

The leaf of a Japanese Maple tree.

The leaf of a Silver Maple tree.

Silver Maple

The leaf of a Silver Maple tree.

The leaf of a Red or Swamp Maple tree.

Red or Swamp Maple

The leaf of a Red or Swamp Maple tree.

The leaf of a Sycamore Maple tree.

Sycamore Maple

The leaf of a Sycamore Maple tree.

The leaf of a Sugar Maple tree.

Sugar Maple

The leaf of a Sugar Maple tree.

"Leaves and fruit of the common persimmon." -University Society, 1920

Persimmon

"Leaves and fruit of the common persimmon." -University Society, 1920

"Section of a Hen's Egg before Incubation. a, yolk, showing concentric layers; a', its semi-fluid center; b, inner dense part of the albumen; b', outer thinner part; c, twisted cords of albumen; h, the white spot, or germ cell." -Cooper, 1887

Egg Parts

"Section of a Hen's Egg before Incubation. a, yolk, showing concentric layers; a', its semi-fluid center;…

The leaves of the common rose geranium, Pelargonium capitatum.

Rose Germanium

The leaves of the common rose geranium, Pelargonium capitatum.

The leaves of the skeleton-leaved geranium, Pelargonium radula.

Skeleton-Leaved Germanium

The leaves of the skeleton-leaved geranium, Pelargonium radula.

Third and final developmental stage of stone cells: "3, The walls are completed. The primary wall is black, cellulose additions white, and the lignified walls in 3 are stippled. Notice that the protoplasts have disappeared in 3, and the pits in some instances are branched." -Stevens, 1916

Stone Cells 3

Third and final developmental stage of stone cells: "3, The walls are completed. The primary wall is…

"Diagram showing the relation of this year's leaves to the wood of the current year." -Stevens, 1916

Plant Tissues

"Diagram showing the relation of this year's leaves to the wood of the current year." -Stevens, 1916

"Diagram showing some types of unusual growth in thickness...B, cross section of stem of species of Bauhinia; the xylem strands, b, are stippled while the surrounding parenchyma and bark tissues are left white." -Stevens, 1916

Bauhinia Unusual Stem Growth

"Diagram showing some types of unusual growth in thickness...B, cross section of stem of species of…

"Diagram showing some types of unusual growth in thickness...C, portion of a cross section of stem of Gnetum scandens; 1, 2, and 3 are successive rings of growth; m, is the pith; b, is a sclerenchyma ring. The xylem portions with the exception of the larger tracheal tubes are shaded, while the medullary rays, phloem and tissues intervening between the rings of growth and the outer cortes tissues are left white." -Stevens, 1916

G. Scandens Unusual Stem Growth

"Diagram showing some types of unusual growth in thickness...C, portion of a cross section of stem of…

"A, diagram of course of vascular bundles in a palm stem; 1m, 2m, 3m, bundles from the median portions of the leaves." -Stevens, 1916

Palm Stem

"A, diagram of course of vascular bundles in a palm stem; 1m, 2m, 3m, bundles from the median portions…

"B, diagram of vascular bundles in external view and in cross section of the stem of Cerastium. The leaves are shown cut off at 1, 2, 2' and 3." -Stevens, 1916

Cerastium Stem

"B, diagram of vascular bundles in external view and in cross section of the stem of Cerastium. The…

"Diagram showing the course of the vascular bundles in a stem of Clematis viticella. Median bundles from the leaves are marked A, lateral bundles B and C." -Stevens, 1916

C. Viticella Stem

"Diagram showing the course of the vascular bundles in a stem of Clematis viticella. Median bundles…

"Diagram showing the relation of the water-carrying tissues of the leaves to those of the stem, and how the older rings of growth give up their water to the newer before this water can enter the leaves. The figures at the bottom indicate in years the age of the rings." -Stevens, 1916

Water Flow in Plants

"Diagram showing the relation of the water-carrying tissues of the leaves to those of the stem, and…

"Diagram to show the path of the water as it rises to, and escapes from, the leaves." -Stevens, 1916

Leaf Water Flow

"Diagram to show the path of the water as it rises to, and escapes from, the leaves." -Stevens, 1916

"Diagram suggestive of the distribution of intercellular spaces throughout a plant. The heavy horizontal lines in stem and root indicate intercellular spaces in medullary rays. The arrows indicate the entrance of gasses through the stomata of the leaves and stomata and lenticels of the roots and everywhere over the younger roots where waterproofing is slight." -Stevens, 1916

Intercellular Spaces of a Plant

"Diagram suggestive of the distribution of intercellular spaces throughout a plant. The heavy horizontal…

"Diagram showing how, in Indian corn, the food from the upper and lower leaves finds its way into the ears." -Stevens, 1916

Indian Corn Food Circulation

"Diagram showing how, in Indian corn, the food from the upper and lower leaves finds its way into the…

"Diagram to show food from the leaves descending through the sieve tubes and being stored in the medullary ray cells and xylem parenchyma." -Stevens, 1916

Plant Food Storage

"Diagram to show food from the leaves descending through the sieve tubes and being stored in the medullary…

"Microscopic Structure of white Statuary marble." -Geikie, 1893

Marble

"Microscopic Structure of white Statuary marble." -Geikie, 1893

The black-and-white creeping warbler

Black-and-White Creeping Warbler

The black-and-white creeping warbler

"The repairing of a rent in the nest of the red tree ant (Ecophylla smaragdina). The nest is made of leaves, held together with a silken web. The figure shows the workers repairing a rent, one brigade of them being occupied in drawing the edges of the leaves together, while the others on the inside of the nest move the spinning larvae back and forth across the gap." -National Geographic, 1912

Red Tree Ants

"The repairing of a rent in the nest of the red tree ant (Ecophylla smaragdina). The nest is made of…

Pieris rapae, or Small White butterfly.

P. Rapae Butterfly

Pieris rapae, or Small White butterfly.

Some species of the lily family (Liliaceae): top, nodding trillium (Trillium cernuum); left, erect flower of Trillium recurvatum; right, dwarf white trillium (Trillium nivale).

Trillium Lilies

Some species of the lily family (Liliaceae): top, nodding trillium (Trillium cernuum); left, erect flower…

Of the lily family (Liliaceae), Veratrum viride.

V. Viride

Of the lily family (Liliaceae), Veratrum viride.

Two species of the lily family (Liliaceae): right, yellow adder's tongue (Erythronium Americanum); left, white adder's tongue (Erythronium albidum).

E. Americanum and E. Albidum

Two species of the lily family (Liliaceae): right, yellow adder's tongue (Erythronium Americanum); left,…

Of the crowfoot family (Ranunculaceae): left, thimble-weed (Anemone Virginiana); right, large white-flowered anemone (Anemone riparia).

Thimble-Weed and Large White-Flowered Anemone

Of the crowfoot family (Ranunculaceae): left, thimble-weed (Anemone Virginiana); right, large white-flowered…

Of the crowfoot family (Ranunculaceae), the flower of the white baneberry or Actaea alba.

White Baneberry

Of the crowfoot family (Ranunculaceae), the flower of the white baneberry or Actaea alba.

Of the crowfoot family (Ranunculaceae): large image: the red baneberry or Actaea rubra; bottom right: fruit of the white baneberry or Actaea alba.

Red Baneberry

Of the crowfoot family (Ranunculaceae): large image: the red baneberry or Actaea rubra; bottom right:…

Of the pulse family (Leguminosae), the milk vetch or Astragalus canadensis.

Milk Vetch

Of the pulse family (Leguminosae), the milk vetch or Astragalus canadensis.

Of the pulse family (Leguminosae), the leaves of the beach pea or Lathyrus maritimus.

Beach Pea Leaves

Of the pulse family (Leguminosae), the leaves of the beach pea or Lathyrus maritimus.

Of the pulse family (Leguminosae): large image, the partridge pea with pods (Cassia Chamaecrista); leaves on left side, Strophostyles helvola.

Partridge Pea

Of the pulse family (Leguminosae): large image, the partridge pea with pods (Cassia Chamaecrista); leaves…

Of the spurge family (Euphorbiaceae), the white margined spurge or Snow on the Mountain (Euphorbia marginata).

White Margined Spurge

Of the spurge family (Euphorbiaceae), the white margined spurge or Snow on the Mountain (Euphorbia marginata).

Of the cashew family (Anacardiaceae), poison sumac or Rhus Vernix.

Poison Sumac

Of the cashew family (Anacardiaceae), poison sumac or Rhus Vernix.

Of the cashew family (Anacardiaceae), poison ivy or Rhus toxicodendron.

Poison Ivy

Of the cashew family (Anacardiaceae), poison ivy or Rhus toxicodendron.

Of the violet family (Violaceae): left, sweet white violet (Viola blanda); right, lance-leaved violet (Viola lanceolata).

Sweet White Violet and Lance-Leaved Violet

Of the violet family (Violaceae): left, sweet white violet (Viola blanda); right, lance-leaved violet…