Kilayim, Chapter 1, Mishnah 5. This mishnah continues the listing of items that are considered kilayim with one another, even though they appear similar to each other.
The three pairs in the mishnah:
"HaTzenon v'haNafutz" - the radish is a root vegetable. The nafutz was already mentioned in the discussion of turnips: a type of radish, except that its leaves resemble turnip leaves. Even though the two items resemble each other, and both are forms of radish, they are considered kilayim with one another.
"HaChardal v'haLafsan" - chardal is mustard seed, and lafsan is wild mustard seed. These too are considered two different species with regard to kilayim.
"U'dela'as Yevanis im haMitzris o im haRemutzah" - the remutzah was mentioned in one of the earlier mishnayos: a type of bitter gourd that must be placed in remetz - in hot ashes - in order to sweeten it. Even though all of these types of gourd resemble each other, they are considered kilayim with one another and may not be mixed.
In summary: this mishnah listed three pairs - the radish and the nafutz, mustard and wild mustard, and the Greek gourd with the Egyptian gourd or with the remutzah - each of which, despite the outward resemblance between the two members of the pair, is considered two different species that are forbidden as kilayim with one another.
In the next section we will continue with the study of the next mishnah.