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This is an example of a needle-shaped leaf of the Larch.

Needle Leaf

This is an example of a needle-shaped leaf of the Larch.

This type of parallel-veined leaf has veins running from the base of the leaf to the point.

Parallel-veined Leaf

This type of parallel-veined leaf has veins running from the base of the leaf to the point.

This type of parallel-veined leaf has veins running from the midrib of the leaf to the margins.

Parallel-veined Leaf

This type of parallel-veined leaf has veins running from the midrib of the leaf to the margins.

This is an example of a pinnately parted leaf.

Parted Leaf

This is an example of a pinnately parted leaf.

This is an example of a palmately parted leaf.

Parted Leaf

This is an example of a palmately parted leaf.

Here is a leaf of the pitcher plant. You see that it has an opening at the upper end. It can hold considerable water.

Pitcher Plant Leaf

Here is a leaf of the pitcher plant. You see that it has an opening at the upper end. It can hold considerable…

Here is a leaf of the Venus's fly trap which is a spring trap for flies and other insects. Here you see the leaf as it is spread out, wide open.

Venus Fly Trap Leaf

Here is a leaf of the Venus's fly trap which is a spring trap for flies and other insects. Here you…

Here is a leaf of the Venus's fly trap which is a spring trap for flies and other insects. The two parts of the leaf close together and the points on the edges are locked together.

Venus Fly Trap Leaf

Here is a leaf of the Venus's fly trap which is a spring trap for flies and other insects. The two parts…

This is an example of a whorled-shaped leaf structure.

Whorled Leaf

This is an example of a whorled-shaped leaf structure.

Here is a shoot of the Horse chestnut with a large terminal bed, and with very conspicuous leaf scars, and just above each is an axillary bud.

Leaf-scar

Here is a shoot of the Horse chestnut with a large terminal bed, and with very conspicuous leaf scars,…

Here is a shoot of the Hickory with a large terminal bed, and with alternate leaf scars, and just above each is an axillary bud.

Leaf-scar

Here is a shoot of the Hickory with a large terminal bed, and with alternate leaf scars, and just above…

"Effect of removal of a leaflet from a palmately compound leaf (e.g. Woodbine). B, normal leaf; C, after removal of upper right-hand leaflet. A, Unbroken lines represent average normal position of leaflets; dotted lines, average position of leaflets after operation; barred line, position of leaflet removed." -Gager, 1916

Leaflet Removal

"Effect of removal of a leaflet from a palmately compound leaf (e.g. Woodbine). B, normal leaf; C, after…

This shows a typical leaf.

Leaves

This shows a typical leaf.

"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 legume is a pod of a simple pistil, which splits into two pieces.

Legume

A legume is a pod of a simple pistil, which splits into two pieces.

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

Legume

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

This is a classification of a type of fruit.

Legume

This is a classification of a type of fruit.

Lemnaceae is a family of flowering plants, also known as the duckweed family, as it contains the duckweeds or water lentils. Since duckweeds are now considered to be a branch of the arum or aroid family (Araceae), the name 'Lemnaceae' is rapidly falling out of use among taxonomists, who treat it as a subfamily called Lemnoideae.

Lemnaoideae

Lemnaceae is a family of flowering plants, also known as the duckweed family, as it contains the duckweeds…

"Leptolaena multiflora. 1. a perpendicular section of its flower; 2. a diagram of its structure; 3. a section of its seed." -Lindley, 1853

Leptolaena

"Leptolaena multiflora. 1. a perpendicular section of its flower; 2. a diagram of its structure; 3.…

Flowers of Leucolaena rotundifolia, from the Apiaceae family.

Leucolaena

Flowers of Leucolaena rotundifolia, from the Apiaceae family.

"1. Shields of Variolaria amara; 2, a portion of the thallus of the same plant." -Lindley, 1853

Lichen

"1. Shields of Variolaria amara; 2, a portion of the thallus of the same plant." -Lindley, 1853

"5. shield of Opegrapha scripta; 6. thallus of the same." -Lindley, 1853

Lichen

"5. shield of Opegrapha scripta; 6. thallus of the same." -Lindley, 1853

"A. Lecanora esculenta; B. Lecanora affinis." -Lindley, 1853

Lichens

"A. Lecanora esculenta; B. Lecanora affinis." -Lindley, 1853

"Glycrrhiza glabra. GLYCYRRHIZA. A plant with a sweet root, licorice, also spelled liquorice. A genus of leguminous perennial herbs, nearly allied to Astragalus, and including a dozen species, which are widely distributed through temperate regions." -Whitney, 1911

Licorice

"Glycrrhiza glabra. GLYCYRRHIZA. A plant with a sweet root, licorice, also spelled liquorice. A genus…

border of lilies of the field.

Lily

border of lilies of the field.

Lily of the valley look like little bells hanging from the stem.

Lily of the Valley

Lily of the valley look like little bells hanging from the stem.

Convallaria majalis, commonly known as the Lily of the Valley or Lily-of-the-Valley, is the only species in the genus Convallaria in the flowering plant family Ruscaceae, formerly placed in the lily family Liliaceae or in its own family called Convallariaceae. This woodland plant is native throughout the cool temperate Northern Hemisphere in Asia and Europe and a limited native population in Eastern USA.

Lily of the Valley

Convallaria majalis, commonly known as the Lily of the Valley or Lily-of-the-Valley, is the only species…

A type of flower.

Lily of the Valley

A type of flower.

The female reproductive organ of a Lily.

Lily Pistil

The female reproductive organ of a Lily.

"Nymphaea coerulea. 1. a perpendicular section of a seed of N. alba; 2. half an embryo, showing the great plumule lying in the cavity of one cotyledon." -Lindley, 1853

Egyptian Blue Lily

"Nymphaea coerulea. 1. a perpendicular section of a seed of N. alba; 2. half an embryo, showing the…

"Arthropodium paniculatum. 1. A flower magnified; 2. a ripe capsule; 3. a transverse section of it; 4. a vertical section of a seed." -Lindley, 1853

Pale Vanilla Lily

"Arthropodium paniculatum. 1. A flower magnified; 2. a ripe capsule; 3. a transverse section of it;…

Lilium martagon (Martagon or Turk's cap lily) is a species of lily. It has a widespread native region extending from central Europe east through northern Asia to Mongolia and Korea. Several subspecies have been named. The plant is stem-rooting, growing between 1 m and 2 m tall. The flower colour is typically a pink-purple, with dark spots, but is quite variable, extending from near white to near black. The flowers are scented. Numerous flowers are borne on each plant, and up to 50 can be found on vigorous plants.

Turk's Cap Lily

Lilium martagon (Martagon or Turk's cap lily) is a species of lily. It has a widespread native region…

The fruit of the Linden, Tilia americana, (Keeler, 1915).

Linden Fruit

The fruit of the Linden, Tilia americana, (Keeler, 1915).

This shows a linear leaf.

Linear Leaf Shape

This shows a linear leaf.

"Litsaea Baueri. 1. a male flower; 2. a female; 3. a stamen, with a gland at the base; 4. an anther, with the recurved valves; 5. a cluster of fruit; 6. a cotyledon seen from within, with the plumule adhering to the inner face." -Lindley, 1853

Litsea

"Litsaea Baueri. 1. a male flower; 2. a female; 3. a stamen, with a gland at the base; 4. an anther,…

"Life-history of Liverwort (Marchantia polymorpha): 1 and 2, developing thallus; 2 shows the cup with gemmae; 3, section across thallus, showing chimney-shaped stoma and green cells under, and mucilage cell on left; 4, male hats; 5, development of antheridia; 6, antheridium nearly ripe; 7, antherozoid; 8, female hat; 9, 10, archegonia before fertilization; 11, 12, 13, fertilized egg dividing; 14, immature sporogonium, containing spores and elaters." -Hazeltine, 1894

Liverwort Life Cycle

"Life-history of Liverwort (Marchantia polymorpha): 1 and 2, developing thallus; 2 shows the cup with…

"Flowering branch of Lizardtail (Saururus cernuus). a, flower." -Whitney, 1911

Lizard's Tail

"Flowering branch of Lizardtail (Saururus cernuus). a, flower." -Whitney, 1911

Loasa Pentlandica is a flowering plant of the Loasaceae family used as an ornamental plant.

Loasa

Loasa Pentlandica is a flowering plant of the Loasaceae family used as an ornamental plant.

Flower of Lobelia cardinalis, Cardinal flower; corolla making approach to the ligulate form; filaments (<em>st</em>) monadelphous, and anthers (<em>a</em>) syngenesious.

Lobelia cardinalis

Flower of Lobelia cardinalis, Cardinal flower; corolla making approach to the ligulate form; filaments…

"Lobelia siphilitica. 1. an entire flower; 2. the stamens; 3. perpendicular section of the ovary; 4 and 5 stigmas." -Lindley, 1853

Great Blue Lobelia

"Lobelia siphilitica. 1. an entire flower; 2. the stamens; 3. perpendicular section of the ovary; 4…

This shows the cluster of three, slightly twisted leaves of the Loblolly Pine, Pinus taeda, (Keeler, 1915).

Loblolly Pine Needles

This shows the cluster of three, slightly twisted leaves of the Loblolly Pine, Pinus taeda, (Keeler,…

The Locust is in the Pea family. The flower is butterfly-shaped.

Locust

The Locust is in the Pea family. The flower is butterfly-shaped.

These are the seeds or racemes of the Locust blossoms, Robinia pseudoacacia,(Keeler, 1915).

Locust Blossom Seeds

These are the seeds or racemes of the Locust blossoms, Robinia pseudoacacia,(Keeler, 1915).

A few cells of Locust-bark, a crystal in each.

Locust-bark

A few cells of Locust-bark, a crystal in each.

"1. Locusta of Corynephorus canescens (Grey Hair-grass); 2. paleae, &c. of the same; 3. locusta of Phalaris aquatica (Harding grass); 4. locusta of Alopecurus pratensis (Meadow Foxtail); 5. locusta of Aira caryophyllea (Silver hairgrass); 6. floret of the same; 7. locusta of Festuca duriuscula (Red Fescue); 8. locust of Glyceria fluitans (Water Mannagrass); 9. floret of the same; 10. locusta of Eragrostis poaeformis (Lovegrass)." -Lindley, 1853

Grass Locusta

"1. Locusta of Corynephorus canescens (Grey Hair-grass); 2. paleae, &c. of the same; 3. locusta of Phalaris…

"Longitudinal tangential section of [maple], showing the ends of the medullary rays." - Century, 1889

Longitudinal Tangential Section of Maple

"Longitudinal tangential section of [maple], showing the ends of the medullary rays." - Century, 1889

This shows the leaf of the Longleaf Willow, Salix fluviatilis, (Keeler, 1915).

Longleaf Willow Leaf

This shows the leaf of the Longleaf Willow, Salix fluviatilis, (Keeler, 1915).

"Lythrum salicaria. 1. a flower; 2. the calyx spread open; 3. the pistil; 4. a cross section of the ovary; 5. the capsule; 6. a section of a seed." -Lindley, 1853

Purple Loosestrife

"Lythrum salicaria. 1. a flower; 2. the calyx spread open; 3. the pistil; 4. a cross section of the…

"Loranthus chrysanthus. 1. section of a flower; 2. of a fruit." -Lindley, 1853

Loranthus

"Loranthus chrysanthus. 1. section of a flower; 2. of a fruit." -Lindley, 1853

"Loranthus memecylifolius. 1. corolla laid open; 2. ovary, &c." -Lindley, 1853

Loranthus

"Loranthus memecylifolius. 1. corolla laid open; 2. ovary, &c." -Lindley, 1853

"Nelumbium speciosum. 1. a section of its young carpel; 2. a section of the same when ripened into a bean, and showing the structure of the seed." -Lindley, 1853

Lotus

"Nelumbium speciosum. 1. a section of its young carpel; 2. a section of the same when ripened into a…

Series of bud-scales and foliage-leaves from a developing bud of the Low Sweet Buckeye, showing nearly complete gradation, from a scale to a compound leaf of five leaflets; and that the scales answer to reduced petioles.

Low Sweet Buckeye

Series of bud-scales and foliage-leaves from a developing bud of the Low Sweet Buckeye, showing nearly…

"3. a piece of the thallus of Sticta pulmonacea, with lacunae and soredia; 4. thallus of the same, bearing shields." -Lindley, 1853

Tree Lungwort

"3. a piece of the thallus of Sticta pulmonacea, with lacunae and soredia; 4. thallus of the same, bearing…

"Sticta pulmonaria, or Lungs of the Oak." -Lindley, 1853

Tree Lungwort

"Sticta pulmonaria, or Lungs of the Oak." -Lindley, 1853

Monadelphous stamens of Lupine.

Lupine

Monadelphous stamens of Lupine.

Plant with large root system. Bracts at the top with spore cases.

Lycopodium Carolinianum

Plant with large root system. Bracts at the top with spore cases.

"Maba elliptica. 1. a flower; 2. a male corolla cut open; 3. a calyx and pistil; 4. fruit; 5. its section; 6. a perpendicular section of a seed." -Lindley, 1853

Maba

"Maba elliptica. 1. a flower; 2. a male corolla cut open; 3. a calyx and pistil; 4. fruit; 5. its section;…