eBay can be a wonderful source for rare and unusual plants, but there’s always a chance you won’t get what you expect. I bought this plant in 2014, and it arrived as a small dormant bulb with no distinguishing characteristics. It could have been almost anything, and I had to wait 6 1/2 years to find out if I got an excellent deal on a very rare bulb, or paid way too much for a mislabeled Narcissus. In this case, I can breathe a sigh of relief, because the plant was as advertised.
Paramongaia weberbaueri is, despite its common name, not a daffodil. It is in the same family as daffodils, the Amaryllidaceae,, but while daffodils are native to the Mediterranean region, Paramongaia is from South America–specifically western Peru, where it grows in the rain shadow of the Andes. There are apparently two forms of the species, a high altitude form which grows and flowers in summer, and a winter-growing lowland form. My plant is obviously the winter-growing form. I keep it in a bright spot in the greenhouse year-round (minimum winter temperature 60 F, 15 C; summer maximum 93 F, 34 C). During winter I water at least once a week, or more frequently if the soil dries out. Then I leave it completely dry, no watering whatsoever, all summer long. Presumably, the humidity in the greenhouse is sufficient to keep the bulb from desiccating while dormant.
The flower bud developed relatively slowly for an Amaryllid and lasted just under a week in good condition. The fragrance was wonderful.
So far, my plant has shown no tendency to produce offsets. The anthers failed to produce pollen–or dried up prematurely, I’m not sure which. In any case, I was unable to self-pollinate the flower.