Marsh Citrus paradisi Macf. Grapefruit
Brown Marsh, Cudebeck, Hooghart, Marsh Jibarito, Marsh Miami, Marsh seedless , Marsh White, M-S-F-57-4-X-E, M-S-F-58-6-X-E, Wautelet, White Marsh, White seedless, Whitney, Whitney Marsh, Zinbaa rose
According to one theory, 'Marsh seedles' is a bud sport bred in 1860. According to other theories, it is a random seedling of 'Duncan' variety found in Lakeland, Florida in the garden of nurseryman C.M. Marsh. It was the first truly seedless (or almost seedless) variety that received fame and popularity mostly thanks to E. H. Tyson. Soon it became the most popular grapefruit variety in the world and was named after its discoverer in 1890.
'Marsh seedles' is extremely vigorous and high tree with a wide crown that requires hot summers. It has shiny leaves, small thorns and is susceptible to antractosis and tristeza and less cold hardy than other grapefruit varieties. This cultivar is also known for its high yields and can have as much as 120-150 individual fruits, provided that it is planted in the soil and has ideal climatical conditions. The fruit is typically very big (yet slightly smaller than maternal variety, around 8,5-12cm), flattened (which is an important characteristic of this
variety) and weighs around 300g. Its strong, thinner very aromatic and easy to peel rind is usually light yellow, but in cooler climates can have brown-pink spots (12mm in diameter) on the pericarp. The pulp is yellow-brown, softer, smoother, includes around 52% of juices and has excellent aroma and taste. Each individual fruit contains roughly 45-50mg/100ml of Vitamin C in its juice and also large amounts of acids, which however vanish as the fruit ripens. Pulp is usually divided into 12-14 segments. 'Marsh seedless' ripens neither early, nor late, but usually sometime around October, but because the fruit can hang ripe on the tree quite long, it can be harvested in May as well. This variety is considered to be seedless (although it can contain up to 1-6 seeds) because it is tetraploid. It has less bitter substances in cooler climates (naringin), but thinner rind in warmer climates.
Cultivation of 'Marsh seedless' has spread all over the world, although the fruit generally doesn't achieve the quality of 'Duncan' variety. Its flavor is dependant on climate, growing conditions... Ripe fruit that is supposed to hang on the tree for longer periods should be sprinkled with giberlit. It is also easy to store. 'Marsh seedless' belongs to the most popular varieties grown in California, Texas, Arizona, South America, Australia, Israel and India. It is known as 'Hooghart' in Surinam.
'Marsh seedless' gave rise to such varieties as 'Frost Marsh' and 'Ruby'. Other than that, there are 2 pigmented forms, bud mutations, which were discovered in 1919 and 1921. They are known as 'Thompson' and 'Redblush'. Other variety - 'Miami' is sometimes considered to be the clone of 'Marsh seedless'.