This September suddenly, what I assume to be a bulb or rhizome-based plant was coming out of the ground somewhere in my garden. I didn't plant it and have no idea where it came from.
Early November suddenly the flower-stem came out and I could see 3-5 flower-buds.
When it got cold early Mid-November I cut the stem and put it in vase only to see the buds opening soon and presenting nice yellow flowers.
The flowers to me look like a lily-flower with the typical stigma (the right word, the thing hosting the pollen) floating around. The leaves however are looking more from what I'm supposed to see on my irises which are long and sharp leaves.
Here are two pictures I took in a rush, so please accept my excuses for the bad quality:
I'd like to know what kind of plant this is and what to do to keep it alive or maybe muliply?