Medical Definition of ERYTHROPOIESIS. : the production of red blood cells (as from the bone marrow)âcalled also erythrocytopoiesis, erythrogenesis. â erythÂ·roÂ·poiÂ·etÂ·ic \-Ëet-ik\ adjective.
Horticultural. Pop ash has several redeeming characteristics that make it an interesting, attractive, and useful landscape tree. Its small to medium size, wide spreading crown, crooked and multi-stemmed trunk, glossy and compound leaves, and fast growth rates make it a decorative addition to landscapes.lowers are 1/8 inch long and bloom in early spring before leaves emerge. The blooms appear in clusters of many yellow (male) and green (female) flowers. Fruits are 1Â½ to 2 inch long elliptical samaras (winged seeds) that have 1 wing (or occasionally 3).
Diamond Pattern Bark: As white and green ash trees age their bark develops distinct diamond patterns. Young green and white ash trees have smooth bark. Black ash trees start with warty or smooth bark and grow to have flakey bark as they age, but, a diamond pattern may still be seen.he wing on the green ash fruit, seen here, extends down almost to the base of the seed, whereas the wing on white ash fruit only extends to the top half of the seed. Both are about the same size, 1 -2 inches in length.