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Ulmus americana, generally known as the American elm or, less commonly, as the white elm or water elm, [a] is a species of elm native to eastern North America. The trees can live for several hundred years.
Few flowering plants self-pollinate; some can provide their own pollen (self fertile), but require a pollinator to move the pollen; others are dependent on cross pollination from a genetically different source of viable pollen, through the activity of pollinators. One of the possible pollinators to assist in cross-pollination are honeybees.
It was steadily weakened by viruses in Europe and had all but disappeared by the 1940s. However, the disease had a much greater and longer-lasting impact in North America, owing to the greater susceptibility of the American elm, Ulmus americana, which masked the emergence of the second, far more virulent strain of the disease Ophiostoma novo-ulmi.
The bright and beautiful red rose is known as the rose of romance—and conveys feelings of passion and longing. That's why it's the most popular flower sold on Valentine’s Day! SHOP NOW
The meaning of these gorgeous flowers varies depending on the hue. Purple lilacs represent the first emotions of love while magenta lilacs symbolize love and passion, perfect for a more serious lover.
Learn about 11 most popular rose color meanings and what the colors symbolize before you send a bouquet, from bright red to maroon, pink, white, and yellow.
Don’t place that flower order without reading this first! From friendship to passion, here’s what every rose color signifies. The post 17 Rose Color Meanings to Help You Pick the Perfect Bloom ...
The starting-points for List of elm cultivars, hybrids and hybrid cultivars were fourfold: (1) Green's 'Registration of Cultivar Names in Ulmus ' (1964), [1] based on the contemporary nomenclature of elm species and wild hybrids; (2) Krüssmann's confirmation or correction of cultivar-names in his monumental Handbuch der Laubgehölze (1976); [2] (3) Heybroek's table of Netherlands research ...