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The three species of walnuts most commonly grown for their seeds are the Persian (or English) walnut , originating from Iran, the black walnut – native to eastern North America – and the Japanese walnut, also known as the heartnut (J. ailantifolia). [6]
Juglans nigra, the eastern American black walnut, is a species of deciduous tree in the walnut family, Juglandaceae, native to central and eastern North America, growing mostly in riparian zones. Black walnut is susceptible to thousand cankers disease , which provoked a decline of walnut trees in some regions.
The Juglandaceae are a plant family known as the walnut family. They are trees , or sometimes shrubs, in the order Fagales . Members of this family are native to the Americas , Eurasia , and Southeast Asia .
Walnut trees are any species of tree in the plant genus Juglans, the type genus of the family Juglandaceae, the seeds of which are referred to as walnuts.All species are deciduous trees, 10–40 metres (33–131 ft) tall, with pinnate leaves 200–900 millimetres (7.9–35.4 in), with 5–25 leaflets; the shoots have chambered pith, a character shared with the wingnuts (Pterocarya), but not ...
Native to Amazon. Domesticated and cultivated in South America, Central America and Caribbean. Indian Potato - roots of two native species- Apios americana and Apios priceana; Jerusalem artichoke - specific species of sunflower with large, edible root. Lily Bulbs- several species in Lilium family
In 2017 a total of 210 acres (85 ha) was grown. [4] This crop is grown in all counties and the City of Baltimore. [4] Gray Mold (Botrytis cinerea) is a common problem as it is around the world. [5] Fernández-Ortuño et al., 2014 finds populations here have resistance to fludioxonil and to thiophanate-methyl. [5] Many are multiresistant. [5]
Franciscan Fathers first introduced the English walnut around the 1770s from South America to California. [1] [2] As of 1998, walnuts from California account for 99% of all walnuts grown in the United States, and for 38% of the world's production of walnuts. [3] Southern California Black Walnut
Butternut is a slow-growing species, and rarely lives longer than 75 years. It has a 40–80 cm (16–31 in) stem diameter, with light gray bark . The leaves are alternate and pinnate , 40–70 cm (16–28 in) long, with 11–17 leaflets, each leaflet 5–10 cm (2–4 in) long and 3–5 cm ( 1 + 1 ⁄ 4 –2 in) broad.