Page "Ulmus americana" Paragraph 35

Success was finally achieved with the autumn-flowering Chinese elm Ulmus parvifolia by the late Prof. Eugene Smalley towards the end of his career at the University of Wisconsin-Madison after he overcame the problem of keeping Chinese elm pollen alive until spring.

Only one of the hybrid clones was commercially released, as ' Rebella ' in 2011 by the German nursery Eisele GmbH ; the clone is not available in the USA.