I had not heard of this plant so I did a check on it. It's from Africa and is very slow growing. But after being introduced to Australia, it has become a weed since the seeds are dispersed by birds.
Serious answer:
That leads me to believe that something occurs during the digestion of the seeds that helps the seeds to germinate.
Someone may be along in a moment with the scientific name for that type of seed which relies on birds.
Not so serious answer:
Get a bird.
