||There are two main parts to the answer. First, we have seen no references to Phalaris grass seeds containing DMT. Various parts of the plant contain different percentages of DMT but at this point it seems that the seeds do not. Second, even if the seeds did contain DMT an MAOI would still need to be used in conjunction as DMT is not orally active by itself.|
Syrian Rue contains harmine/harmaline which are MAOIs. It does not contain DMT. It is most commonly used in combination with a DMT containing plant in order to make the DMT orally active. Harmine/harmaline do have their own effects at high enough doses, but it is frequently accompanied by nausea, vomiting and diarrhea. The effects of DMT and Harmine/Harmaline are quite different.
Your question mentions chewing Syrian Rue seeds, as far as we know, very few people (if any) use this method. Syrian Rue is generally ground and encapsulated or processed with a simple water extraction. They taste very bad. :)