The Welwitschia mirabilis plants at UConn produced abundant fully-formed cones for the first time, this past summer. On warm afternoons in midsummer, the mature female cones produced "pollination drops," or droplets of nectar at the end of hair-like extensions of the ovules. The male cones have nectaries, as well, which probably attract insect pollinators in the wild in Namibia.
I placed pollen from the males into the pollination drops of female cones for several days running back in July, and two months later the seeds are starting to mature. Some of the seeds are very light and thin, and are probably duds, but quite a few look like viable Welwitschia seed. I may plant a few now to see what happens, though it probably isn't the best time of year.