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).
Blue Ash adapts to a variety of stresses, especially to poor, dry, rocky soils. It grows in full sun to partial sun, and is found in zones 4 to 7. Potential Problems - Like other ash trees, Blue Ash is occasionally susceptible to borers and scales as pests, and leaf anthracnose and trunk canker as diseases. In addition, seed litter from all trees and surface roots (with age in compacted or shallow soils) are potential liabilities in urban areas.