Medicago is a genus of flowering plants, commonly known as medick or burclover, in the legume family (Fabaceae). It contains at least 87 species and is distributed mainly around the Mediterranean basin. The best-known member of the genus is alfalfa, an important forage crop, and the genus name is based on the Latin name for that plant, medica, from Greek: μηδική (πόα) Median (grass). Most members of the genus are low, creeping herbs, resembling clover, but with burs. However, alfalfa grows to a height of 1 meter, and tree medick is a shrub. Members of the genus are known to produce bioactive compounds such as medicarpin and medicagenic acid. Chromosome numbers in Medicago range from 2n = 14 to 48.
Ensifer meliloti are an aerobic, Gram-negative, and diazotrophic species of bacteria. S. meliloti are motile and possess a cluster of peritrichous flagella. S. meliloti fix atmospheric nitrogen into ammonia for their legume symbionts, such as alfalfa. S. meliloti forms a symbiotic relationship with legumes from the genera Medicago, Melilotus and Trigonella, including the model legume Medicago truncatula. This symbiosis promotes the development of a plant organ, termed a root nodule. Because soil often contains a limited amount of nitrogen for plant use, the symbiotic relationship between S. meliloti and their legume hosts has agricultural applications. These techniques reduce the need for inorganic nitrogenous fertilizers.
Medicago polymorpha is a plant species of the genus Medicago. It is native to the Mediterranean basin but is found throughout the world. It forms a symbiotic relationship with the bacterium Sinorhizobium medicae, which is capable of nitrogen fixation. Common names include California burclover, toothed bur clover, toothed medick and burr medic.
Medicago arborea is a flowering plant species in the pea and bean family Fabaceae. Common names include moon trefoil, shrub medick, alfalfa arborea, and tree medick. It is found throughout Europe and especially in the Mediterranean basin, primarily on rocky shores among shrubby vegetation. It forms a symbiotic relationship with the bacterium Sinorhizobium meliloti, which is capable of nitrogen fixation. It is the only member of the genus Medicago which is used as an ornamental. M. arborea is sometimes misidentified as Cytisus, which it resembles.
Medicago coronata, the crown medick, is a plant species of the genus Medicago. It is found throughout the Mediterranean basin. It forms a symbiotic relationship with the bacterium Sinorhizobium meliloti, which is capable of nitrogen fixation.
Medicago falcata is a plant species of the genus Medicago. It is native to much of Europe and Asia, but is found throughout the world. It forms a symbiotic relationship with the bacterium Sinorhizobium meliloti, which is capable of nitrogen fixation. Its common names include yellow lucerne, sickle alfalfa, yellow-flowered alfalfa, yellow alfalfa, sickle medick and yellow medick.
Medicago laciniata is a plant species of the genus Medicago. It is found primarily in the southern Mediterranean basin. It forms a symbiotic relationship with the bacterium Sinorhizobium meliloti, which is capable of nitrogen fixation. Common names include cutleaf medick and tattered medick. Grows in Sinai, Egypt.
Medicago littoralis is a plant species of the genus Medicago. It is found primarily in the Mediterranean basin. It forms a symbiotic relationship with the bacterium Sinorhizobium meliloti, which is capable of nitrogen fixation. Common names include shore medick, water medick, coastal medick, and strand medick.
Medicago marina is a plant species of the genus Medicago. It is native to the Mediterranean basin but is found worldwide. It forms a symbiotic relationship with the bacterium Sinorhizobium meliloti, which is capable of nitrogen fixation. Common names include coastal medick and sea medick.
Medicago minima is a plant species of the genus Medicago. It is native to the Mediterranean basin but is found worldwide. It forms a symbiotic relationship with the bacterium Sinorhizobium meliloti, which is capable of nitrogen fixation. Common names include bur medick, little bur-clover, little bur medick, little medick, small medick, and woolly bur medick.
Medicago murex, the spiny medick, is a plant species of the genus Medicago. It is found throughout the Mediterranean basin. It forms a symbiotic relationship with the bacterium Sinorhizobium medicae, which is capable of nitrogen fixation.
Medicago orbicularis is a plant species found throughout the Mediterranean basin and along the European Black Sea coast. It forms a symbiotic relationship with the bacterium Sinorhizobium medicae, which is capable of nitrogen fixation. Common names include blackdisk medick, button clover, button medick, and round-fruited medick.
Medicago praecox, the Mediterranean medick or early medick, is a plant species of the genus Medicago. It is found throughout the northern Mediterranean. It forms a symbiotic relationship with the bacterium Sinorhizobium meliloti, which is capable of nitrogen fixation.
Medicago radiata, the ray-podded medick, is a plant species of the genus Medicago. It is found throughout the eastern Mediterranean and in Asia. It forms a symbiotic relationship with the bacterium Sinorhizobium meliloti, which is capable of nitrogen fixation.
Medicago rotata is a species of flowering plant in the Fabaceae family. It is found throughout the eastern Mediterranean from Turkey to Israel. It forms a symbiotic relationship with the bacterium Sinorhizobium medicae, which is capable of nitrogen fixation.
Medicago scutellata is a plant species of the genus Medicago. It is found throughout the Mediterranean basin. It forms a symbiotic relationship with the bacterium Sinorhizobium meliloti, which is capable of nitrogen fixation. Common names include snail medick and shield medick.
Medicago turbinata, the Southern medick, is a plant species of the genus Medicago It is found throughout the Mediterranean basin. It forms a symbiotic relationship with the bacterium Sinorhizobium medicae, which is capable of nitrogen fixation. An unidentified lectin isolated from M. turbinata has shown limited usefulness as a phytohaemagglutinin. The seed weight is 4.66 pounds.
Medicago brachycarpa is a plant species of the genus Medicago. It is found throughout the Middle East. It forms a symbiotic relationship with the bacterium Sinorhizobium meliloti, which is capable of nitrogen fixation.
Medicago ciliaris, the ciliate medick, is a plant species of the genus Medicago. It is found throughout the Mediterranean basin. It forms a symbiotic relationship with the bacterium Sinorhizobium medicae, which is capable of nitrogen fixation. It is considered by some to be a subspecies of Medicago intertexta.
Trigonella suavissima is a herbaceous plant that is endemic to Australia. It is a member of the genus Trigonella and the family Fabaceae. Common names include Cooper clover, Menindee clover, calomba, Darling trigonella, sweet fenugreek, channel clover, sweet-scented clover and Australian shamrock.
