Dear Alberto, I am puzzled by your request for more information about these three genera since I provided a lot of information about them in my introductions to the topic of the week when we discussed them and a lot of that information is integrated on the wiki or there are links to the complete information. Many of the species as I have noted have a wide distribution and grow in many different situations (shade, sun, soil differences, elevation differences.) Sometimes you can't determine how adaptable they are until you try them. I grow Triteleia ixioides ssp. anilina and it blooms fine for me even though it does not appear sometimes until February and it is a higher elevation species and probably spends a lot of time under snow each year. It obviously copes with different conditions that it would have normally. Any of my garden plants I picture on the wiki obviously don't need cold to grow. Many of them I've shared with John Lonsdale who lives in a colder climate and they have done fine there too so they may be tolerant of colder winters as well. And seed from different population may behave differently. I have different bloom times for some of the same species that originated in different areas and some increase rapidly and others do not. Ron Ratko's seed as I have mentioned in the past is a great resource since he describes the conditions where he collected which allows you to get some idea of how those populations grow. Mary Sue