種

1. noun seed (e.g. of a plant); pip; kernel; stone (e.g. of a peach)
2. progeny; offspring; issue; breed
3. paternal blood; lineage
4. sperm; semen; seed
5. cause; source; seed; origin
6. material (e.g. for an article); matter (e.g. of a story); subject (of discussion); theme; (news) copy; source (of a story)
7. food, cooking ingredient; main ingredient (of a piece of sushi); leaven
8. mechanism (of a magic trick, etc.); secret; trickery
9. usually in kana, hanafuda, oft. as タネ 10-point card; tane; animal card

しゅ

1. noun kind; sort; type; class
2. biology species
3. abbreviation, logic species

くさ

1. noun, suffix, oft. ぐさ in compounds cause; seed; origin
2. noun variety; kind
3. noun, counter counter for varieties