I had posted on the forum of the Pacific Bulb Society regarding bulbs with curly leaves, with some very interesting responses, including a link to an article that states that it is an adapation for collecting moisture from fog and dew. This is fascinating!
I should say here, that if anyone doesn't know about the Pacific Bulb Society, please log on to their site: www.pacificbulbsociety.org. You can find a wealth of information on this site, and if you have questions or observations regarding bulbs, the forum gives access to many members who are very expert in their field. You don't need to be a PBS member to join in the discussions on the forum.
I also found in my files another example of a Cyrtanthus with curly leaves, C. helictus. I forgot I had this picture, since I lost the solitary bulb in my possession a few years back. Here it is.