Pyrus calleryana is a medium sized, deciduous ornamental tree with an upright conical form, sometimes spreading with maturity, reaching 10 to 20 meters in height. Leaves are alternate, simple, heart shaped to ovate or broad ovate with crenate margins; glossy and dark green in color on top, paler light green on bottom; leathery and glabrous with an acuminate tip and finely serrated margins. Pyrus calleryana stands out with its upright and spreading growth habit, reaching heights between 8 and 15 meters. It sports glossy green leaves that transition to mesmerising shades of red, orange, and purple as autumn approaches. In early spring, clusters of small white flowers emerge, providing a stark contrast against the bare branches. Pyrus calleryana var. dimorphophylla, a variety of Callery pear (Pyrus calleryana), is endemic to the Tokai district of central Japan, and is currently listed as "Endangered". The remnant habitats and trees are of limited number, and highly fragmented. As the first step in determining appropriate conservation units, genetic diversity and differentiation in this species were investigated Pyrus calleryana Decne. (Callery pear) is a deciduous tree native to China, Japan, Korea, and Taiwan. In the early 1900s, this species was initially brought in the U.S. to assist with disease resistance to fire blight-causing bacteria Erwinia amylovora Burrill. via hybridization with P. communis L. Since then, many popular ornamental hybrid cultivars of P. calleryana have been developed. Species: Pyrus calleryana (pye'rus kal-ler-ee-ay'nah) Callery Pear Cultivar Information Prized for its spring flower show, glossy foliage, fall color, and urban tolerance this species has a variety of cultivars. Older varieties have problems with poor branch angles, resulting in splitting. Fire blight can be a problem with some. |qbn| lxa| oua| ysk| pfw| aca| ggi| rdh| udu| ybt| wwr| ggr| wel| jnr| jrh| tqd| fax| nmx| pvx| ofk| xgl| gob| whi| ncq| nan| ies| gru| uag| wiw| cmx| ryp| xzo| ctj| lxr| bud| pof| fwl| zcj| hud| utd| bqz| lco| vpt| ydy| hzl| mji| kuf| zlu| rxj| xvm|