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"Scleroderris fuliginosa. a, immature ascocarps ... S. fuliginosa is said to be parasitic on twigs and branches of willows in Europe and North America." -Whitney, 1911

Willow Canker

"Scleroderris fuliginosa. a, immature ascocarps ... S. fuliginosa is said to be parasitic on twigs and…

"Scleroderris fuliginosa. b, ascus containing spores and accompanied by paraphyses ... S. fuliginosa is said to be parasitic on twigs and branches of willows in Europe and North America." -Whitney, 1911

Willow Canker

"Scleroderris fuliginosa. b, ascus containing spores and accompanied by paraphyses ... S. fuliginosa…

Rusts are fungi in the Uredinales order that are plant parasites and resemble rust. "Ravenelia. a, stem of Cassia nictitans with teleutospores on the stem and uredospores on the leaves; b, stem and teleutospores enlarged; c, section showing the teleutospores."

Rust Fungus

Rusts are fungi in the Uredinales order that are plant parasites and resemble rust. "Ravenelia. a, stem…

The scale insects are small insects of the order Hemiptera, generally classified as the superfamily Coccoidea. There are about 8,000 species of scale insects. Most scale insects are parasites of plants, feeding on sap drawn directly from the plant's vascular system. This is a bit of leaf with scales.

Scale Insects

The scale insects are small insects of the order Hemiptera, generally classified as the superfamily…

The scale insects are small insects of the order Hemiptera, generally classified as the superfamily Coccoidea. There are about 8,000 species of scale insects. Most scale insects are parasites of plants, feeding on sap drawn directly from the plant's vascular system. This is an adult female scale.

Scale Insects

The scale insects are small insects of the order Hemiptera, generally classified as the superfamily…

The scale insects are small insects of the order Hemiptera, generally classified as the superfamily Coccoidea. There are about 8,000 species of scale insects. Most scale insects are parasites of plants, feeding on sap drawn directly from the plant's vascular system. This is the wax scale under which the female lives.

Scale Insects

The scale insects are small insects of the order Hemiptera, generally classified as the superfamily…

The scale insects are small insects of the order Hemiptera, generally classified as the superfamily Coccoidea. There are about 8,000 species of scale insects. Most scale insects are parasites of plants, feeding on sap drawn directly from the plant's vascular system. This is a scale larva.

Scale Insects

The scale insects are small insects of the order Hemiptera, generally classified as the superfamily…

The scale insects are small insects of the order Hemiptera, generally classified as the superfamily Coccoidea. There are about 8,000 species of scale insects. Most scale insects are parasites of plants, feeding on sap drawn directly from the plant's vascular system. This is an adult male scale.

Scale Insects

The scale insects are small insects of the order Hemiptera, generally classified as the superfamily…

"Scale-insect. Oyster-shell bark-louse of the apple (Mytilaspis pomorum); male. a, ventral view with wings closed; b, dorsal view with wings expanded; c, scale (line shows natural size); d, leg; f, antennal joint." -Whitney, 1911

Scale Insect

"Scale-insect. Oyster-shell bark-louse of the apple (Mytilaspis pomorum); male. a, ventral view with…

The scale insects are small insects of the order Hemiptera, generally classified as the superfamily Coccoidea. There are about 8,000 species of scale insects. Most scale insects are parasites of plants, feeding on sap drawn directly from the plant's vascular system. The female is wingless and has a large waxen egg-sac (e.s.) attached to her body.

Scale Insects

The scale insects are small insects of the order Hemiptera, generally classified as the superfamily…

The scale insects are small insects of the order Hemiptera, generally classified as the superfamily Coccoidea. There are about 8,000 species of scale insects. Most scale insects are parasites of plants, feeding on sap drawn directly from the plant's vascular system. Male scale insects are unusual in possessing only one pair of wings, thus making them resemble true flies (Diptera), though they lack the halteres (rudimentary hind wings) seen in flies, and have tail filaments, which do not occur in flies.

Scale Insects

The scale insects are small insects of the order Hemiptera, generally classified as the superfamily…

"a, Scales of Chionaspis pinifoliae upon pine-leaves, natural size; b, scale of male, enlarged; c, straight scale of female, enlarged; d, curved scale of female, enlarged." -Whitney, 1911

Pine Needle Scale

"a, Scales of Chionaspis pinifoliae upon pine-leaves, natural size; b, scale of male, enlarged; c, straight…

"Wood-rose, a remarkable vegetable excrescence, resembling a flower with radiating corrugated petals carved from wood, caused by the union of the saucer-shaped placenta-like base of certain parasitic plants of the mistle-toe family with the foster-branch of the host and its persistence after the death of the plant." -Whitney, 1911

Wood Rose

"Wood-rose, a remarkable vegetable excrescence, resembling a flower with radiating corrugated petals…

"Wood-rose, a remarkable vegetable excrescence, resembling a flower with radiating corrugated petals carved from wood, caused by the union of the saucer-shaped placenta-like base of certain parasitic plants of the mistle-toe family with the foster-branch of the host and its persistence after the death of the plant." -Whitney, 1911

Wood Rose

"Wood-rose, a remarkable vegetable excrescence, resembling a flower with radiating corrugated petals…