Going from flower to flower up the spike, he rubs pollen thus from one blossom on to the cleft stigma of another blossom, and thus the flower is fertilized and seeds are able to be produced.
(seeds; to be produced; ) (he; rubs thus; from one blossom; T:on to the cleft stigma of another blossom) (the flower; is fertilized; ) (seeds; are; able to be produced)
seeds he the flower seeds
to be produced rubs thus is fertilized are
from one blossom T:on to the cleft stigma of another blossom
able to be produced