ClipArt ETC
"A leaf of Acacia. A, as seen by day; B, the same leaf asleep at night." -Bergen, 1896

Acacia Leaf

"A leaf of Acacia. A, as seen by day; B, the same leaf asleep at night." -Bergen, 1896

In breathing, the mouth and gills of a fish open alternately; the water entering the mouth escapes by the opening of the gills. Shown is a section of the bronchial arch of a cod, with a pair processes supporting leaflets or plates. Labels: 1. A section of the branchial arch. 2, A pair of processes. 3, Branchial leaflets or plates. The number of leaflets in one process of the cod is about one thousand; in the salmon fourteen hundred; in the sturgeon sixteen hundred.

Section of a Branchial Arch of a Cod

In breathing, the mouth and gills of a fish open alternately; the water entering the mouth escapes by…

"Horse-chestnut (Aesculus Hippocastanum). ls, leaf-scar, showing scars of seven fibro-vascular bundles, corresponding, in number, to the seven leaflets of the compound leaf, formerly attached at ls. The leaf is drawn to a smaller scale than the branch." -Gager, 1916

Horse-Chestnut Leaf

"Horse-chestnut (Aesculus Hippocastanum). ls, leaf-scar, showing scars of seven fibro-vascular bundles,…

A leaf with three leaflets subdivided into three different sections.

Biternate Leaf

A leaf with three leaflets subdivided into three different sections.

A leaf with three leaflets.

Ternate Leaf

A leaf with three leaflets.

"Pinnately compound leaf of locust, with spines for stipules." -Bergen, 1896

Locust Leaf

"Pinnately compound leaf of locust, with spines for stipules." -Bergen, 1896

"Development of an oxalis leaf. A, full-grown leaf; B, rudimentary leaf, the leaflets not yet evident; C, more advanced stage, the leaflets appearing; D, a still more advanced stage." -Bergen, 1896

Oxalis Leaf Development

"Development of an oxalis leaf. A, full-grown leaf; B, rudimentary leaf, the leaflets not yet evident;…

"Pinnately compound leaf of pea. A tendril takes the place of a terminal leaflet." -Bergen, 1896

Pea Leaf

"Pinnately compound leaf of pea. A tendril takes the place of a terminal leaflet." -Bergen, 1896

"Wild senna (Cassia marilandica)." -Gager, 1916

Wild Senna

"Wild senna (Cassia marilandica)." -Gager, 1916