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|Noun||1.||Alstonia - genus of evergreen trees or shrubs with white funnel-shaped flowers and milky sap; tropical Africa to southeastern Asia and Polynesia|
dicot genus, magnoliopsid genus - genus of flowering plants having two cotyledons (embryonic leaves) in the seed which usually appear at germination
Apocynaceae, dogbane family, family Apocynaceae - chiefly tropical trees or shrubs or herbs having milky juice and often showy flowers; many are sources of drugs