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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.
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.
The Ulmaceae (/ ʌ l ˈ m eɪ s i /) are a family of flowering plants that includes the elms (genus Ulmus), and the zelkovas (genus Zelkova). [3] Members of the family are widely distributed throughout the north temperate zone, and have a scattered distribution elsewhere except for Australasia.
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 ...
Tilia americana, Tilia cordata: 6 7 yes, short flow up to 14 days; white, aromatic honey [3] see Monofloral honey: feral, ornamental, produces a high volume of honey on a cycle of every five to eight years, with lower volume of nectar other years [citation needed] major – 800–1,100 lb/acre T American elm: Ulmus americana: 2 4 no feral minor ...
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.
'Bleke Bet' [147] reaches a height of 120 cm (4 ft), has dark leaves, and 18 mm (3 ⁄ 4 in) diameter flowers with rose to purple centers and white ray florets. [148] 'Buck's Fizz' [149] has 13 mm (1 ⁄ 2 in) diameter flowers that have white rays with pink to purple disks, and leaves with "bronze-purple tints". It is reported to reach a ...
A list of tree species, grouped generally by biogeographic realm and specifically by bioregions, and shade tolerance. Shade-tolerant species are species that are able to thrive in the shade, and in the presence of natural competition by other plants.
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