(Mishnah): [Doughs of] five matters (species) are obligated in Chalah - wheat, barley, spelt, oats, and rye.

These are obligated in Chalah, and they join one with another (this will be explained);

They are forbidden [to eat] due to Chadash before [the Omer is offered on] Pesach, and to reap before the Omer;

If they took root before the Omer, the Omer permits them. If not, they are forbidden until the coming Omer.

(Gemara - Mishnah): Five matters are obligated in Chalah...

Suggestion: It says "v'Hayah b'Achalchem mi'Lechem ha'Aretz Tarimu Serumah la'Shem" - perhaps [doughs of] all matters are obligated in Chalah!

Rejection: "Mi'Lechem", and not all bread.

Suggestion: Perhaps only wheat and barley (for which Eretz Yisrael is praised) are obligated. What is the source for spelt, oats and rye?

Rejection: "Reishis Arisoseichem" includes [these].

Suggestion: We should say that it includes everything!

Rejection (R. Yosi citing Reish Lakish): I went to Kisarin, and I heard R. Acha b'Ribi Ze'ira say 'my father (R. Ze'ira) used to say in the name of R. Yishmael, it says "Lechem [Oni]" regarding Pesach, and it says "Lechem" regarding Chalah. Just like Lechem said about Pesach is something that comes to Matzah or Chametz (i.e. if it is baked quickly, it is Matzah, and if not, it becomes Chametz), also Lechem said about Chalah is something that comes to Matzah or Chametz.' (We explained this like OHR ZARU'A);

[Chachamim] checked, and found that nothing comes to Matzah or Chametz other than the five species (grains). Other matters do not come to Matzah or Chametz, rather, they merely rot.

(Beraisa - R. Yochanan ben Nuri): Karamis (fennel or cumin?) is obligated in Chalah.

And so R. Yochanan ben Nuri used to say, rice is a kind of Degen (grain), and one is Chayav Kares for its Chimutz [during Pesach], for it comes to Matzah or Chametz. Rabanan say, it does not come to Matzah or Chametz. (We explained this like GRA.)

Question: We should check [whether or not it comes to Matzah or Chametz]!

Answer: They argue about the test. R. Yochanan ben Nuri says that they checked, and found that it comes to Matzah or Chametz. Rabanan say that they checked, and did not find that it comes to Matzah or Chametz. (I.e. it ferments a little. They argue about whether or not this is Chimutz.)