I assume you refer to a kind as from Genesis 1:
11And God said, Let the earth bring forth grass, the herb yielding seed, and the fruit tree yielding fruit after his kind, whose seed is in itself, upon the earth: and it was so.
12And the earth brought forth grass, and herb yielding seed after his kind, and the tree yielding fruit, whose seed was in itself, after his kind: and God saw that it was good. 21And God created great whales, and every living creature that moveth, which the waters brought forth abundantly, after their kind, and every winged fowl after his kind: and God saw that it was good.
24And God said, Let the earth bring forth the living creature after his kind, cattle, and creeping thing, and beast of the earth after his kind: and it was so.
25And God made the beast of the earth after his kind, and cattle after their kind, and every thing that creepeth upon the earth after his kind: and God saw that it was good.
Simply put, grass, herbs and trees yield fruit "after their kind". Blue-grass yields blue-grass, ginseng yields ginseng, apple trees yield apples, and seeds which make more apple trees, which make more apples...Every sea creature and every fowl, and every land creature, etc., reproduce "after their kind". From blue whales come more blue whales, from pigeons come more pigeons, from cows, cows, black widows, black widows, etc.