Wastes is not a basic land type. It is a name of a card that is a basic land which has no basic land type (or other subtype, for that matter). So it is considered by effects that look for “a basic land”, but not cards that look for “land card with a basic land type” (like Boseiju, Who Endures) or count the number of basic land types you have (like cards with Domain).
Wastes is not a basic land type. It is a name of a card that is a basic land which has no basic land type (or other subtype, for that matter). So it is considered by effects that look for “a basic land”, but not cards that look for “land card with a basic land type” (like Boseiju, Who Endures) or count the number of basic land types you have (like cards with Domain).