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Greens

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Chlorella

Chlorella is a genus of single-celled green algae, belonging to the phylum Chlorophyta. It is spherical in shape, about 2 to 10 μm in diameter, and is without flagella. Chlorella contains the green photosynthetic pigments chlorophyll-a and -b in its chloroplast. It depends on photosynthesis for growth and multiplies rapidly, requiring only carbon dioxide, water, sunlight, and a small amount of minerals.

Chlorella has been researched as a potential food because it is high in protein and other essential nutrients. When dried, it is about 45 percent protein, 20 percent fat, 20 percent carbohydrate, and 10 percent various minerals and vitamins. However, because it is a single-celled alga, harvest had posed practical difficulties for its large-scale use as a food source. Methods of mass production are now being used to cultivate it in large artificial circular ponds.

Description	Price	Select	Quantity
Chlorella - Class 12	$ 7.50
Chlorella - Class 30	$ 8.20
Chlorella - Class 60	$ 16.40
Chlorella - Class 90	$ 24.60
Chlorella - Class 120	$ 32.80
Chlorella - Class 150	$ 41.00
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Closterium

Closterium cells are crescent-shaped or elongate and lack spines. Some are quite straight and needle-like, while others are much broader with curved ends. The ends of the cell are usually tapered and may be pointed or rounded. Each semicell has a single axial, ridged chloroplast with at least one pyrenoid. Occasionally there are two chloroplasts per semicell. The nucleus is located in the center of the cell between the chloroplasts.

Terminal vacuoles at the cell tips hold vibrating crystals of barium or calcium sulfate, the function of which are unknown. Brownian motion causes these microscopic particles to move erratically due to the impacts of collisions with the surrounding liquid molecules in which they are suspended.

Description	Price	Select	Quantity
Closterium - Class 12	$ 7.50
Closterium - Class 30	$ 8.20
Closterium - Class 60	$ 16.40
Closterium - Class 90	$ 24.60
Closterium - Class 120	$ 32.80
Closterium - Class 150	$ 41.00
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Desmids

Desmids are the Desmidiales class of green algae, comprise around 40 genera and more than 10000 species, found mostly but not exclusively in freshwater. Most are unicellular, and are divided into two compartments separated by a narrow bridge or isthmus.

Desmids assume a variety of highly symmetrical and generally attractive shapes, which provide the basis for their classification. Each has a single chloroplast, and no flagella.

Description	Price	Select	Quantity
Desmids - Class 12	$ 7.50
Desmids - Class 30	$ 8.20
Desmids - Class 60	$ 16.40
Desmids - Class 90	$ 24.60
Desmids - Class 120	$ 32.80
Desmids - Class 150	$ 41.00
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Gonium

Gonium are colonial flagellates. The colony measures about 90 microns across. Colonies have 4, 6, 8, 16, or 32 cells. Shown is a 16 cell colony. Individual cells resemble Chlamydomonas as each cell has two flagella, an eye spot and a chloroplast.

Gonium make food from sunlight, favor water with high organic content and are readily available from science supply companies.

Description	Price	Select	Quantity
Gonium - Class 30	$ 8.20
Gonium - Class 60	$ 16.40
Gonium - Class 90	$ 24.60
Gonium - Class 120	$ 32.80
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Hydrodictyon

The water net (genus Hydrodictyon) is a taxon of green algae of the family Hydrodictyaceae. Its name water net comes from its shape, which looks like a netlike hollow sack. It can grow up to several tens of cm.

Hydrodictyon like clean, eutrophic water and has become a pest in New Zealand, where it has been recently introduced. The Water Net gets its name from the large (usually pentagonal or hexagonal) mesh that they form.

Description	Price	Select	Quantity
Hydrodictyon - Class 12	$ 7.50
Hydrodictyon - Class 30	$ 8.20
Hydrodictyon - Class 60	$ 16.40
Hydrodictyon - Class 90	$ 24.60
Hydrodictyon - Class 120	$ 32.80
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Nitella

Nitellas are bright green algae that often are mistaken for higher plants because they appear to have leaves and stems. These long, slender, delicate, smooth-textured algae lie on the bottom of a lake or pond and are seldom found in the water column. Whorls of forked branches are attached at regularly spaced intervals along the "stems". Nitellas sometime grow together with muskgrasses (Chara spp.), another plant-like algae, to form underwater meadows.

Description	Price	Select	Quantity
Nitella - Class 30	$ 10.20
Nitella - Class 60	$ 20.40
Nitella - Class 90	$ 30.60
Nitella - Class 120	$ 40.80
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Oedogonium

Oedogonium is a genus of filamentous green algae. Filamentous means the all the cells are in the same plane. Reproduces in 2 ways- sexually and asexually. Reproduces sexually through syngamy.

The anthridia which produces sperm and the oogonium which produces the egg, release the sperm and egg. The egg and sperm then fuse and form a zygote (2n). The zygote then produces the filamentous green algae which is haploid (1n). The oedogonium can also produce asexually through zoospores. These separate from the parent plant through the zoosporangium and continue to divide producing the filamentous green algae. Oedogium is usually freefloating when mature though it can be attached to plants. Lives in quiet, fresh water.

Description	Price	Select	Quantity
Oedogonium - Class 12	$ 7.50
Oedogonium - Class 30	$ 8.20
Oedogonium - Class 60	$ 16.40
Oedogonium - Class 90	$ 24.60
Oedogonium - Class 120	$ 32.80
Oedogonium - Class 150	$ 41.00
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Pandorina

Pandorina is a genus of green alga composed of 8, 16, or sometimes 32 cells, held together at their bases to form a globular colony surrounded by mucilage. The cells are ovoid or slightly narrowed at one end to appear keystone- or pear-shaped. Each cell has two flagella with two contractile vacuoles at their base, an eyespot, and a large cup-shaped chloroplast with at least one pyrenoid.

The colonies coordinate their flagellar movement to create a rolling, swimming motion. Pandorina shows the beginnings of the colony polarity and differentiation seen in Volvox since the anterior cells have larger eyespots. Molecular sequencing has shown that pandorina is monophyletic.

Description	Price	Select	Quantity
Pandorina - Class 12	$ 7.50
Pandorina - Class 30	$ 8.20
Pandorina - Class 60	$ 16.40
Pandorina - Class 90	$ 24.60
Pandorina - Class 120	$ 32.80
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Protoccocus

The structure of the single-celled alga Protococcus is similar in some ways to a plant cell. Algal cells, like those in plants, have a nucleus and a stiff cell wall made of cellulose. Floating in the cell's cytoplasm is a chloroplast, which contains chlorophyll. The chlorophyll uses energy from sunlight to make food from carbon dioxide and water. Colonies of these algae cells form green scum on ponds and moist rocks.

Description	Price	Select	Quantity
Protoccocus - Living (collected)	$ 11.00
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Scenedesmus

Scenedesmus. This organism is commonly found in freshwater environments including aquaria and jars. The genus includes many species and is popular for studies in genetics and responses of cells to chemical substances. Each cell contains a parietal, platelike chloroplast and usually one pyrenoid.

Description	Price	Select	Quantity
Scenedesmus - Class 12	$ 7.50
Scenedesmus - Class 30	$ 8.20
Scenedesmus - Class 60	$ 16.40
Scenedesmus - Class 90	$ 24.60
Scenedesmus - Class 120	$ 32.80
Scenedesmus - Class 150	$ 41.00
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Spirogyra

Spirogyra is a genus of filamentous green alga of the order Zygnematales. It is commonly found in freshwater areas. Spirogyra is a photosynthetic, eukaryotic cell. Spirals of chloroplast surround the vacuole, within which the nucleus is supported by cytoplasmic strands.

In a remarkable example of conjugation, Spirogyra reproduces sexually by exchanging DNA between cells. Certain filaments in a loose parallel bundle of Spirogyra assume the female role, and others the male. The cells of adjacent filaments develop tubular extensions which grow towards one another and eventually fuse to form a continuous tube between the cells. Meanwhile the contents of each cell have formed a round sphere. The spheres from the male filament squeeze their way down the connecting tubes to fuse with a sphere of the female cell in the other filament. The result of this sexual union is the formation of a zygote (zygospore) within the chambers of the female filament. After a dormant period, the zygotes undergo meiosis and germinate, resulting in new filaments.

Description	Price	Select	Quantity
Spirogyra - Class 12	$ 7.50
Spirogyra - Class 30	$ 8.20
Spirogyra - Class 60	$ 16.40
Spirogyra - Class 90	$ 24.60
Spirogyra - Class 120	$ 32.80
Spirogyra - Class 150	$ 41.00
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Volvox

Volvox is one of the best-known genera of green algae (chlorophytes) and is the most developed in a series of genera that form spherical colonies. Each Volvox is compsed of numerous biflagellate cells similar to Chlamydomonas, on the order of 1000 in total, interconnected and arranged in a hollow sphere (coenobium). The cells swim in coordinated fashion, with a distinct anterior and posterior - or since Volvox resembles a little planet, a 'north and south' pole. The cells have eyespots, more developed near the anterior, which enables the colony to swim towards light.

An asexual colony includes both somatic or vegetative cells, which do not reproduce, and gonidia near the posterior, which produce new colonies through repeated division. These daughter colonies are initially held within the parent and have their flagella directed inwards. Later, the parent disintegrates and the daughters invert. In sexual reproduction two types of gametes are produced. Male colonies release numerous microgametes or sperm, while in female colonies single cells enlarge to become oogametes or eggs.

Description	Price	Select	Quantity
Volvox - Class 12	$ 7.50
Volvox - Class 30	$ 8.20
Volvox - Class 60	$ 16.40
Volvox - Class 90	$ 24.60
Volvox - Class 120	$ 32.80
Volvox - Class 150	$ 41.00
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Niles Biological, Inc.
9298 Elder Creek Road
Sacramento, CA 95829
(916) 386-2665