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The Doyenné du Comice pear originated in France, where it was first grown at the Comice Horticole in Angers in the 1840s. [1] The varietal was a chance discovery, and a commemorative plaque in the Loire states: "In this garden was raised in 1849-50 the celebrated pear Doyenné du Comice by the gardener Dhomme and by Millet de la Turtaudiere, President of the Comice Horticole."
Caragana arborescens, the Siberian peashrub, [2] Siberian pea-tree, [3] or caragana, is a species of legume native to Siberia and parts of China (Heilongjiang, Xinjiang) and neighboring Mongolia and Kazakhstan. [4] It was taken to the United States by Eurasian immigrants, who used it as a food source while travelling west.
The root hairs curled in the direction of the application, demonstrating the action of a root hair attempting to curl around a bacterium. Even application on lateral roots caused curling. This demonstrated that it is the nod factor itself, not the bacterium that causes the stimulation of the curling.
Pyrus pashia commonly occurs in mid-hill regions from the Caucasus to the Himalaya, between 750 and 2,600 metres (2,460 and 8,530 ft) above sea-level. [6] The trees themselves, unlike the fruit, are not much sold in the retail trade, and beyond those growing wild the species can be found almost exclusively in local home gardens.
Plant anatomy or phytotomy is the general term for the study of the internal structure of plants. Originally, it included plant morphology , the description of the physical form and external structure of plants, but since the mid-20th century, plant anatomy has been considered a separate field referring only to internal plant structure.
Replacement of a tap root system by a fibrous root is seen in onions, tuberose (Polyanthes tuberosa), grasses, etc. Fibrous roots from normal-stem nodes are seen in grasses like maize, sugarcane, bamboo, etc. Fibrous roots from nodes help in the survival of the plant and thus in vegetative reproduction, when the plant's base is damaged or cut ...
The cockspur coral tree (Erythrina crista-galli), is the national flower of Argentina and Uruguay. [75] The elephant ear tree (Enterolobium cyclocarpum) is the national tree of Costa Rica, by Executive Order of 31 August 1959. [76] The brazilwood tree (Caesalpinia echinata) has been the national tree of Brazil since 1978. [77]
It is a small tree, that grows in hedgerows or at the edge of woods. The Plymouth pear is considered to be either a subspecies of Pyrus pyraster (European wild pear) or a distinct species. [ citation needed ] It is one of the rarest trees in the UK and it is protected under Schedule 8 of the Wildlife and Countryside Act and seeds have been ...