Carl Adolph Agardh

Begoniaceae is a family of monoecious flowering plants with two genera and about 2040 species occurring in the subtropics and tropics of both the New World and Old World. All but one of the species are in the genus Begonia. The family is thought to have arose in Africa and then dispersed to Asia and the Americas. There has been multiple studies on pollination mechanisms within the family that suggest deceit pollination although overall there is not much known about the pollination of most species. There have been many recent discoveries of species in the genus Begonia, such as Begonia

The Xyridaceae are a family of flowering plants. This family has been recognized by many taxonomists and is known as the yellow-eyed grass family. The APG II system, of 2003 (unchanged from the APG system of 1998), also recognizes this family, and assigns it to the order Poales in the clade commelinids, in the monocots. This treatment in APG II represents a slight change from the APG system of 1998, which had recognized the family Abolbodaceae for some of the plants included here; that family was unplaced as to order, but was assigned to this same clade (although APG used the spelling

Hydnoroideae is a subfamily of parasitic flowering plants in the order Piperales. Traditionally, and as recently as the APG III system it given family rank under the name Hydnoraceae. It is now submerged in the Aristolochiaceae. It contains two genera, Hydnora and Prosopanche: Prosopanche is native to Central and South America; Hydnora can be found in semi-arid to desert regions of Africa, the Arabian Peninsula, and Madagascar. Members of this subfamily have been described as the strangest plants in the world.

Zygnema is a genus of freshwater filamentous thalloid alga comprising about 100 species. A terrestrial species, Z. terrestre, is known from India. Zygnema grows as a free-floating mass of filaments, although young plants may be found anchored to streambeds with a holdfast. The filaments form a yellow-green to bright green colored tangled mat, and are composed of elongate barrel-shaped cells, each with two star-shaped (stellate) chloroplasts arrayed along the axis of the cell.

Amphibolis is a genus in the family Cymodoceaceae. It includes two species of sea grass endemic to the western and southern coast of Australia, Amphibolis antarctica and Amphibolis griffithii, commonly known as sea nymph or wire weed. The seeds produce an anchoring comb of bristles while they mature on the female plant, giving the seedling a purchase when it arrives at a new site. A type of seagrass, the plants of this genus forms meadows on calcareous sands. These meadows, and their consequent detritus, become an important source of food and shelter for a number of marine species. The

Petiveriaceae is a family of flowering plants formerly included as subfamily Rivinoideae in Phytolaccaceae. The family comprises nine genera, with about 20 known species.

Nitella is a genus of charophyte green algae in the family Characeae.

Visit the page for more details.

Bulbochaete is a genus of algae belonging to the family Oedogoniaceae. The genus has a cosmopolitan distribution and is found primarily in freshwater habitats, occasionally in brackish waters. The name Bulbochaete refers to its hairs, which are swollen at the base.

Visit the page for more details.

Wrangelia is a genus of red algae in the family Wrangeliaceae. The genus was circumscribed by Carl Adolf Agardh in his book Species algarum rite cognitae, cum synonymis, differentiis specificis et descriptionibus succinctis. Voluminis secundi. Sectio prior. pp. [i]-lxxvi, [i]-189. in 1828. The genus name of Wrangelia is in honour of Fredrik Anton von Wrangel (1786–1842), who was a Danish-Swedish Chamberlain, and also a botanist and alga specialist. The type species, Wrangelia penicillata is also commonly called Pink bush alga. They form bushy plants, growing up to 20 cm (8 in) in height. They

Griffithsia is a genus of red algae in the family Wrangeliaceae. Carl Adolph Agardh named Griffithsia in the honour of phycologist Amelia Griffiths (1768–1858). Griffithsin is a protein isolated from species of Griffithsia.

Halymenia a genus of a macroscopic red algae that grows in oceans worldwide. Species have been found in cold temperate areas but the highest diversity is found in warm temperate and tropical regions. For example, 41 names have been reported for the Indo-Pacific (Guiry & Guiry, 2011). Silva et al. (1996) listed 22 names (including two varieties) for the Indian Ocean.

Visit the page for more details.

Dasycladus is a genus of green algae in the family Dasycladaceae. Dasycladus is a marine species.

Visit the page for more details.

Visit the page for more details.

Visit the page for more details.

Visit the page for more details.

Visit the page for more details.

Visit the page for more details.

Visit the page for more details.

Visit the page for more details.

Visit the page for more details.

Visit the page for more details.

Visit the page for more details.

Visit the page for more details.

Micrasterias is a unicellular green alga of the order Desmidiales. Its species vary in size reaching up to hundreds of microns. Micrasterias displays a bilateral symmetry, with two mirror image semi-cells joined by a narrow isthmus containing the nucleus of the organism. This dual semi-cell structure is unique to the group of green algae to which Micrasterias belongs. Each semi-cell contains a single large chloroplast, the site of photosynthesis for Micrasterias. Chloroplasts within Micrasterias contain chlorophyll a and chlorophyll b and the enzymes required for photosynthesis. The sugar

Desmidium is a genus of green algae, the type genus of the family Desmidiaceae. It has a cosmopolitan distribution in acidic, oligotrophic freshwater lakes and bogs. The genus name of Desmidium is derived from the Greek word 'desmos' (= ribbon, chain or bond). Desmidium consists of cells with two halves, called semicells; the cells are attached to each other at their ends, forming filaments. The cells can be longer or shorter than wide, with a median constriction (called an isthmus) where the two semicells join; the isthmus distinct or indistinct. Cells are oval or three- to five-angled in

Visit the page for more details.