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 '''Cork-tree or Phellodendron''' is a genus of deciduous trees in the family Rutaceae, . It is native to east and northeast Asia.  

The major chemical constituents in the bark of P. amurense are alkaloids of the isoquinoline type. Alkaloids isolated from the bark of P. amurense are berberine, palmatine, magnoflorine, phellodendrine, candicine , and jatrorrhizine. Phellodendrine is an alkaloid of the protoberberine type, whereas candicine is an aliphatic quaternary ammonium compound.<ref name="chemical composition"/>

{{Leaf|oppositeOpposite|pinnately Pinnately compound|5 to 11 leaflets per leaf and leaves are 10" to 15" long}}<ref name="Leaf"/>

{{Flower|Unisexual|2-4cm long|greenishGreenish-yellow|5-20|not Not ornamentally significant blooms in late May and early June}}

{{Fruit||peaPea-sized fruits|aromatic Aromatic when crushedonly on female plants held in clusters|change Change from green to black|}}

As an ornamental plant, Phellodendron is a tree for all seasons. In spring it has yellow flowers, in summer it provides foliage and shade, in fall the leaves turn bright yellow, and the textured bark and winding branches add interest in the winter.<ref name="How to plant/cultivate"/>

{{Commonly seen|Tall grasslands}}, {{Commonly seen|meadowsMeadows}}, {{Commonly seen|Borders of forests and fields}}.

<ref name="chemical composition">[https://link.springer.com/chapter/10.1007%2F978-3-642-73739-8_95 "chemical Chemical constituents"]</ref>

<ref name="Leaf">[http://www.hort.uconn.edu/plants/detail.php?pid=305 "Plant Database"]</ref>

<ref name="How to plant/cultivate">[https://pfaf.org/user/Plant.aspx?LatinName=Phellodendron+lavallei "Cultivation details"]</ref>