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2. List of elm cultivars, hybrids and hybrid cultivars - Wikipedia

   en.wikipedia.org/wiki/List_of_Elm_cultivars...

   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 ...

3. Ulmus americana - Wikipedia

   en.wikipedia.org/wiki/Ulmus_americana

   The American elm is a deciduous tree which, under ideal conditions, can grow to heights of 21 to 35 meters (69 to 115 feet). [3] The trunk may have a diameter at breast height (dbh) of more than 1.2 m (4 ft), supporting a high, spreading umbrella-like canopy.

4. List of pollen sources - Wikipedia

   en.wikipedia.org/wiki/List_of_pollen_sources

   For the plant, the pollinizer, this can be an important mechanism for sexual reproduction, as the pollinator distributes its pollen. 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 ...

5. Elm - Wikipedia

   en.wikipedia.org/wiki/Elm

   After pollination, seeds of spring-flowering elms ripen and fall at the start of summer (June); they remain viable for only a few days. They are planted in sandy potting soil at a depth of 1 cm, and germinate in three weeks. Slow-germinating American elm will remain dormant until the second season. [12]

6. Ulmus americana 'Lewis & Clark' - Wikipedia

   en.wikipedia.org/wiki/Ulmus_americana_'Lewis...

   The American elm cultivar Ulmus americana 'Lewis & Clark' (trade name Prairie Expedition) is a development from the North Dakota State University (NDSU) Research Foundation breeding programme, released in 2004 to commemorate the 200th anniversary of the eponymous expedition. [1]

7. Ulmus americana 'Augustine' - Wikipedia

   en.wikipedia.org/wiki/Ulmus_americana_'Augustine'

   The American elm cultivar Ulmus americana 'Augustine', originally called 'Augustine Ascending', was cloned by Archie M. Augustine of the Augustine Nursery of Bloomington, Illinois, from a nursery seedling planted in 1927 in Normal, Illinois, and found to be columnar in habit. [2] [3] See also the similar cultivars 'Columnaris' and 'Ascendens ...