ClipArt ETC
Utricle of the common Pigweed (Chenopodium album).

Common Pigweed

Utricle of the common Pigweed (Chenopodium album).

Section of a Pine-seed, showing its polycotyledonous embryo in the centre of the albumen; moderately magnified.

Section of Pine-seed

Section of a Pine-seed, showing its polycotyledonous embryo in the centre of the albumen; moderately…

Seedling of pine-seed, showing the freshly expanded six cotyledons in a whorl, and the plumule just appearing.

Seedling of Pine-seed

Seedling of pine-seed, showing the freshly expanded six cotyledons in a whorl, and the plumule just…

A pistil; with ovary, <em>a</em>, half cut away, to show the contained ovules; <em>b</em>, style; <em>c</em>, stigma.

Pistil

A pistil; with ovary, a, half cut away, to show the contained ovules; b, style; c,…

Cone of a common Pitch Pine.

Pitch Pine

Cone of a common Pitch Pine.

Inside view of a separated scale or open carpel of a Pitch Pine cone with a seed in place.

Pitch Pine Seed

Inside view of a separated scale or open carpel of a Pitch Pine cone with a seed in place.

The seed of a Pitch Pine cone.

Pitch Pine Seed Wing

The seed of a Pitch Pine cone.

A pollen grain.

Pollen

A pollen grain.

Section of a Potato-seed, showing the embryo coiled in the albumen.

Potato-seed

Section of a Potato-seed, showing the embryo coiled in the albumen.

Young pumpkin seedling.

Pumpkin Seedling

Young pumpkin seedling.

Embryo of Pumpkin-seed, partly open.

Pumpkin-Seed

Embryo of Pumpkin-seed, partly open.

One of the pair of keys or winged fruits of Red Maple; the seed-bearing portion cut open to show the seed.

Red Maple

One of the pair of keys or winged fruits of Red Maple; the seed-bearing portion cut open to show the…

Embryo taken out and partly opened.

Red Maple Embryo

Embryo taken out and partly opened.

Seed enlarged, and divided to show the crumpled embryo which fills it.

Red Maple Seed

Seed enlarged, and divided to show the crumpled embryo which fills it.

Seedling with stem joints and pair of leaves.

Red Maple Seedling

Seedling with stem joints and pair of leaves.

Section of a grain of Rice, lengthwise, showing embryo outside the albumen, which forms the principal bulk.

Seed of Grain of Rice

Section of a grain of Rice, lengthwise, showing embryo outside the albumen, which forms the principal…

Seed of Ricinus or Castor-oil plant, with caruncle.

Ricinus

Seed of Ricinus or Castor-oil plant, with caruncle.

Section of seed of Rock Rose, Helianthemum Canadense; orthotropus, with curved embryo in the albumen.

Seed of Rock Rose

Section of seed of Rock Rose, Helianthemum Canadense; orthotropus, with curved embryo in the albumen.

Silicle of Shepherd's Purse.

Shepherd's Purse

Silicle of Shepherd's Purse.

Silicle of Shepherd's Purse, with one valve removed.

Shepherd's Purse Section

Silicle of Shepherd's Purse, with one valve removed.

Shoot of Horse-chestnut, of one year's growth, taken in autumn after the leaves have fallen; showing the large terminal bud and smaller auxiliary buds.

Shoot of Horse-chestnut

Shoot of Horse-chestnut, of one year's growth, taken in autumn after the leaves have fallen; showing…

Fruit of Silver Maple, Acer dasycarpum, of natural size, the seed-bearing portion divided to show seed.

Silver Maple Key

Fruit of Silver Maple, Acer dasycarpum, of natural size, the seed-bearing portion divided to show seed.

Embryo of the seed taken out.

Silver Maple seed

Embryo of the seed taken out.

Silver Maple seed open out, to show the thick cotyledons and the little plumule or bud between them.

Silver Maple Seed Open

Silver Maple seed open out, to show the thick cotyledons and the little plumule or bud between them.

Model of a simple pistil, with ovary cut across and slightly opened ventrally, to show the ovules and their attachment.

Simple Pistil

Model of a simple pistil, with ovary cut across and slightly opened ventrally, to show the ovules and…

Seed of Sisymbrium, cut across to show the incumbent cotyledons.

Sisymbrium

Seed of Sisymbrium, cut across to show the incumbent cotyledons.

Embryo of the Sisymbrium, detached whole.

Sisymbrium Embryo

Embryo of the Sisymbrium, detached whole.

Of Sneezeweed (Helenium), with its pappus of five scales.

Sneezeweed

Of Sneezeweed (Helenium), with its pappus of five scales.

Of Sow-thistle, with its pappus of delicate downy hairs.

Sow-thistle

Of Sow-thistle, with its pappus of delicate downy hairs.

Magnified section of a spore-case with some spores.

Spore-Case

Magnified section of a spore-case with some spores.

<em>a</em>, filament: <em>b</em>, anther, discharging pollen.

Stamen

a, filament: b, anther, discharging pollen.

Flower of Sedum ternatum.

Stonecrop

Flower of Sedum ternatum.

That of Succory (its pappus a shallow cup).

Succory

That of Succory (its pappus a shallow cup).

Pair of samaras of Sugar Maple.

Sugar Maple

Pair of samaras of Sugar Maple.

Of Sunflower (pappus of two deciduous scales).

Sunflower

Of Sunflower (pappus of two deciduous scales).

Loment or jointed legume of a Tick-Trefoil (Desmodium).

Tick-Trefoil

Loment or jointed legume of a Tick-Trefoil (Desmodium).

Trillium is a genus of about 40-50 species of perennial herbaceous flowering plants, native to temperate regions of North America and Asia.

Trillium

Trillium is a genus of about 40-50 species of perennial herbaceous flowering plants, native to temperate…

A winged seed of the Trumpet-Creeper.

Trumpet-Creeper

A winged seed of the Trumpet-Creeper.

Embryo which has unfolded in early stage of germination and begun to grow.

Unfolding Embryo

Embryo which has unfolded in early stage of germination and begun to grow.

Simple-stemmed vegetation.

Vegetation

Simple-stemmed vegetation.

Section of seed of Violet; anatropous with straight axile embryo in the albumen.

Seed of Violet

Section of seed of Violet; anatropous with straight axile embryo in the albumen.

Akene of Virgin's-bower, retaining the feathered style, which aids in dissemination.

Akene of Virgin's-bower

Akene of Virgin's-bower, retaining the feathered style, which aids in dissemination.

Samara or key of the White Ash, winged at end.

White Ash

Samara or key of the White Ash, winged at end.

Series of sepals, petals, and stamens of White Water-Lily, showing the transitions.

White Water-Lily

Series of sepals, petals, and stamens of White Water-Lily, showing the transitions.

Seed of White Water-Lily, enclosed in its aril.

White Water-Lily

Seed of White Water-Lily, enclosed in its aril.