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).
Average Growth Rate. Trees of the Ash species are classified as moderately fast growing due to their ability to grow between 18 and 25 feet in a single decade. Some species, including European ash (Fraxinus excelsior), grow slightly more slowly, reaching a little less than 18 feet in 10 years.Most species average about 2 feet of growth per year for the first part of their life when planted as ornamentals, but they grow more slowly when used in a row with other trees.oil quality, light availability and many other factors can speed or slow an ash's growth rate. On average, however, these trees grow to be between 40 and 60 feet at maturity, with some species reaching 80 feet in height.