...the various substance offered in yagna... are principally wood in small pieces called samidhas , like Sandalwood , Agar and Tagar wood ( Aquilana Malacensis and Valeriana wallichii ), Deodar ( Cedrus libani ), Mango ( Mangifera Indica ), Dhak or Palash ( Butea monosperma ), Bilva (Aegle Marmelos), Pipal ( Ficus religiosa ), Bargad( Ficus bengalensis ), Shami ( Prosopis cineraria ) and Gular ( Ficus religiosa }; and various Havishya or Havan samagri such as odorifeous substances, substances with healthy constituents, sweet substances and medicinal herbs.