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"Lardizabala triternata. 1. petals and stamens of male flower; 2. carpels; 3. fruit of a Lardizabala; 4. a cross section of it; 5. a seed; 6. a section of it, showing the embryo." -Lindley, 1853

Lardizabala

"Lardizabala triternata. 1. petals and stamens of male flower; 2. carpels; 3. fruit of a Lardizabala;…

Also known as Populus grandidentata. The branch of a Large-Tooth Aspen, native to eastern North America.

Branch of Large-Tooth Aspen

Also known as Populus grandidentata. The branch of a Large-Tooth Aspen, native to eastern North America.

A type of flower.

Larkspur

A type of flower.

"Follicle. Fruit of Larkspur. A dry one-celled seed-vessel consisting of a single carpel, and dehiscent only by the ventral suture, as in the milkweed and larkspur." -Whitney, 1911

Larkspur Follicle

"Follicle. Fruit of Larkspur. A dry one-celled seed-vessel consisting of a single carpel, and dehiscent…

The Delphinium tricorne or Dwarf Larkspur: "1. petals and stamens; 2. carpels; 3. a branch of ripe fruit." -Lindley, 1853

Dwarf Larkspur

The Delphinium tricorne or Dwarf Larkspur: "1. petals and stamens; 2. carpels; 3. a branch of ripe fruit."…

"Melastoma polyanthum. 1. flower; 2, 2. stamens; 3. base of anther; 4. fruit; 5. section of ditto; 6. seed." -Lindley. 1853

Native Lassiandra

"Melastoma polyanthum. 1. flower; 2, 2. stamens; 3. base of anther; 4. fruit; 5. section of ditto; 6.…

Lattice Leaf is the popular name of a water plant, 'Aponogeton jenestralis', belonging to the order 'Aponogetonaceæ'. The older leaves are of open structure, are nearly a foot long, oblong in shape, and float just below the surface of the water. The flowers are born in spikes in the surface. The roots of the plant are used as an article of food by the natives of Madagascar, where it is indigenous. (1. Part of Flower Spike)

Lattice Leaf

Lattice Leaf is the popular name of a water plant, 'Aponogeton jenestralis', belonging to the order…

"1. Leaf of Ouvirandra fenestralis; 2. a flower cut open; 3. section of a ripe carpel of O. Bernieriana; 4, 5. embryo in different positions: the thicker part is cotyledon, the smaller the plumule." -Lindley, 1853

Lattice Leaf Plant

"1. Leaf of Ouvirandra fenestralis; 2. a flower cut open; 3. section of a ripe carpel of O. Bernieriana;…

"Cassytha filiformis. 1. a flower; 2. a fruit; 3. a section of it transversely." -Lindley, 1853

Laurel Dodder

"Cassytha filiformis. 1. a flower; 2. a fruit; 3. a section of it transversely." -Lindley, 1853

Also known as Chamaecyparis lawsoniana. Native to the southwest of Oregon to the far northwest of California.

Branch of Lawson's Cypress

Also known as Chamaecyparis lawsoniana. Native to the southwest of Oregon to the far northwest of California.

Layering is a method of plant propagation by which a part of the plant is bent down and covered with soil, so that it may emit roots before being separated from the parent plant. in some instances, it is sufficient to remove all buds from the shoot, with the exception of a few near its extremity, and to bend it and peg it down so that a part of its proximal end is buried beneath the soil. In others it is necessary partly to cut through the stem at the point where it is to be covered with soil.

Layering Method of Plant Propagation

Layering is a method of plant propagation by which a part of the plant is bent down and covered with…

Plant propagation is the process of artificially or naturally distributing plants. Pictured here is the propagation of plants through cutting.

Leaf Cuttings

Plant propagation is the process of artificially or naturally distributing plants. Pictured here is…

"A greatly magnified view of a perpendicular section of Parmelia aipolia, showing the thecae in the shield, a; b, the hypothecium and some gonidia beneath it; c, the medullary region; and d, the gonimic layer." -Lindley, 1853

Leaf Lichen

"A greatly magnified view of a perpendicular section of Parmelia aipolia, showing the thecae in the…

A variety of spinach.

Arlington Pointed Leaf

A variety of spinach.

A leaf which has the lobes at the base.

Auriculate Leaf

A leaf which has the lobes at the base.

A leaf with double the amount of feather-like leaves.

Bipinnate Leaf

A leaf with double the amount of feather-like leaves.

A leaf with three leaflets subdivided into three different sections.

Biternate Leaf

A leaf with three leaflets subdivided into three different sections.

A converging leaf, curved inward.

Converginerved Leaf

A converging leaf, curved inward.

A cordate leaf has the base rounded in the shape of a heart.

Cordate Leaf

A cordate leaf has the base rounded in the shape of a heart.

Cross section of a leaf, showing the breathing pores and intercellular spaces. The small dots are grains of chlorophyll.

Cross-section of a leaf

Cross section of a leaf, showing the breathing pores and intercellular spaces. The small dots are grains…

A wedge-shaped leaf, tapering gradually to the base.

Cuneate Leaf

A wedge-shaped leaf, tapering gradually to the base.

A leaf which resembles a hand spreading its fingers.

Digitate Leaf

A leaf which resembles a hand spreading its fingers.

"Fork-veined leaves are those in which the primary veins divide into two nearly equal secondary veins, forming a dork, and these subdivided in the same manner."—Darby, 1855

Fork-Veined Leaf

"Fork-veined leaves are those in which the primary veins divide into two nearly equal secondary veins,…

Also known as Dolabriform. A leaf in the shape of an axe.

Hatchet-Shaped Leaf

Also known as Dolabriform. A leaf in the shape of an axe.

"Lanceolate, when it is three or more times as long as it is broad, and rounded at the base, and tapering at the apex."—Darby, 1855

Lanceolate Leaf

"Lanceolate, when it is three or more times as long as it is broad, and rounded at the base, and tapering…

A leaf where the terminal lobe is the largest among the lobes.

Lyrate Leaf

A leaf where the terminal lobe is the largest among the lobes.

A nearly circular leaf.

Orbicular Leaf

A nearly circular leaf.

"It is said to be ovate when it has the outline of the longitudinal section of an egg."—Darby, 1855

Ovate Leaf

"It is said to be ovate when it has the outline of the longitudinal section of an egg."—Darby,…

When divided, the leaf resembles a hand.

Palmate Leaf

When divided, the leaf resembles a hand.

A leaf in the shape of a comb.

Pectinate Leaf

A leaf in the shape of a comb.

A leaf shaped like a foot.

Pedate Leaf

A leaf shaped like a foot.

"Peltate, with the petiole inserted in the lamina, but not in the center of it."—Darby, 1855

Peltate Leaf

"Peltate, with the petiole inserted in the lamina, but not in the center of it."—Darby, 1855

"Perfiolate leaf, caused by the union of two opposite leaves."—Darby, 1855

Perfiolate Leaf

"Perfiolate leaf, caused by the union of two opposite leaves."—Darby, 1855

"Perfiolate leaf, caused by the union of the lobes of the leaves."—Darby, 1855

Perfiolate Leaf

"Perfiolate leaf, caused by the union of the lobes of the leaves."—Darby, 1855

A feather-like leaf with multi-divided features.

Pinnate Leaf

A feather-like leaf with multi-divided features.

A leaf where the lobes go near to the middle.

Pinnatifid Leaf

A leaf where the lobes go near to the middle.

"Ruccinate, when the divisions of a pinnatifid leaf are more or less triangular, and pointing downwards."—Darby, 1855

Ruccinate Leaf

"Ruccinate, when the divisions of a pinnatifid leaf are more or less triangular, and pointing downwards."—Darby,…

A leaf where the depressions are broad at the bottom.

Sinuate-Lobed Leaf

A leaf where the depressions are broad at the bottom.

A leaf which is broad at the apex, and gradually tapering into the petiole.

Spathulate Leaf

A leaf which is broad at the apex, and gradually tapering into the petiole.

A leaf in the shape of an awl.

Subulate Leaf

A leaf in the shape of an awl.

A leaf with triple the amount of feather-like leaves.

Tripinnate Leaf

A leaf with triple the amount of feather-like leaves.

Leaflets usually 3, very prominently toothed.

Leaflets

Leaflets usually 3, very prominently toothed.

Leaflets usually more than 3; not prominently toothed.

Leaflets

Leaflets usually more than 3; not prominently toothed.

Stems weakly arching; leaves lanceolate; flowers showy purplish.

Leaves

Stems weakly arching; leaves lanceolate; flowers showy purplish.

Leaves remotely toothed, acumnate at apex; flowers appearing before the leaves.

Leaves

Leaves remotely toothed, acumnate at apex; flowers appearing before the leaves.

This illustration shows leaves derived from the oval type: 13. Ovate and Serrate; 14. Palmately three cleft.

Leaves Derived from the Oval Type

This illustration shows leaves derived from the oval type: 13. Ovate and Serrate; 14. Palmately three…

Compound Leaves

Compound Leaves

Compound Leaves

A leaf in which the lower lobes are uniteed, either above the stem is sessile or above the petiole if petiolate.

Connate Leaves

A leaf in which the lower lobes are uniteed, either above the stem is sessile or above the petiole if…

Four leaves.

Four Leaves

Four leaves.

"Parallel-veined leaves are those in which the veins proceed from their origin to their termination without any subdivision; the veins being connected by minute, parallel, straight veinlets, passing perpendicularly from one to another."—Darby, 1855

Parallel-Veined Leaves

"Parallel-veined leaves are those in which the veins proceed from their origin to their termination…

Two leaves.

Two Leaves

Two leaves.

"Leschenaultia splendens. 1. calyx, stamens, and style, with stigma and indusium, all magnified." -Lindley, 1853

Lechenaultia

"Leschenaultia splendens. 1. calyx, stamens, and style, with stigma and indusium, all magnified." -Lindley,…

Leschenaultia biloba or the blue lechenaultia is a flowering plant of the Goodeniaceae family.

Blue Lechenaultia

Leschenaultia biloba or the blue lechenaultia is a flowering plant of the Goodeniaceae family.

"Lecythis ovata. 1. a flower divided perpendicularly; 2. a stamen." -Lindley, 1853

Lecythis

"Lecythis ovata. 1. a flower divided perpendicularly; 2. a stamen." -Lindley, 1853

"Fruit of Lecythis grandiflora." -Lindley, 1853

Lecythis

"Fruit of Lecythis grandiflora." -Lindley, 1853

"A hardy biennial plant, producing an oblong bulb, or stalk, which has the flavor of an onion, and is used principally for flavoring soups and stews."—Rawson, 1892

London Flag Leek

"A hardy biennial plant, producing an oblong bulb, or stalk, which has the flavor of an onion, and is…

Spikelets very strongly flattened.

Leersia

Spikelets very strongly flattened.

The flower of Eperua grandiflora, a legume in the Fabaceae family.

Legume

The flower of Eperua grandiflora, a legume in the Fabaceae family.

Plant body inconspicuously nerved, roolets one per disk.

Lemna

Plant body inconspicuously nerved, roolets one per disk.

This illustration shows a portion of Lepidodendron. Lepidodendron is the generic name of a large and important group of plants which flourished principally in the Carboniferous period. The outer surface of the bark is marked by lozenge-shaped, scale-like markings, the leaf-cushions. These are arranged in dense spirals, which wind around the stems. Often, the narrow and pointed leaves are found, still adherent; they may also carry cones <i>(lepidostrobi)</i>, which in form somewhat resemble those of the fir. The branches usually fork repeatedly, and were implanted on a massive stem which had a similar external sculpture. Some of these stems have been seen in the roofs of coal workings with a length of a hundred feet. Their roots are generally known as stigmaria. The Lepidodendra belonged to the Lycopodiaceæ, and have their nearest representatives in the diminutive club-mosses, which they resemble even in their superficial characters.

Portion of Lepidodendron

This illustration shows a portion of Lepidodendron. Lepidodendron is the generic name of a large and…