Undergrowth tree shrub

The major alkaloidal component of Psycholria rosirala BL, a common undergrowth tree shrub was the known tetrameric alkaloid, quadrigemine B, accompanied by four other minor alkaloids, hodgkinsine, (-)-calycanthine, (+)-chimonanthine and calycosidine [66]. The isolation of (+)-chimonanthine is noteworthy since previous isolations were of the levorotatory or meso isomers and the (+)-enantiomer has been previously obtained only from the skin of the Columbian dart frog [67]. 

In Korea, the principal native vegetation is Forest ecosystems. Very little of the original, virgin composition remains, mainly in the plateau of high mountain areas. The dominant vegetation consists of forest trees with varying undergrowth of shrubs and small plants. 

Macronyce(es( Moss layer Lichen layer Tree canopy O ass-dwarf- Undergrowth of frulbodies) shrub layer trees... 

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