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).
The narrow leaf ash does well in urban settings and in acidic soil. Other common names are desert ash and narrow-leaved ash. The cultvar that you will usually see is known as 'Raywood'. It has its own common name of claret ash because the leaves shift to a lovely shade of purple in the fall.sh trees are placed in the genus Fraxinus in the olive (Oleaceae) family. They are often used as shade, lawn and street trees. You can spot one by looking for trees with opposite branching (not many trees do this) and compound leaves.