Lophophora fricii x Lophophora williamsii: This has proven a hard one to deal with. Lophophora williamsii is a self-fertile specie, making it harder to control and stop self-pollination. We are still experimenting with ways of pollinating this specie without it pollinating itself, so thus far we are undecided whether or not it was the Lophophora fricii pollen that fertilized the seeds, or itself. One way to possibly determine which specie was the father (although a very poor way and gives no hard evidence) is seed count. In our experience crossed L. fricii x L. fricii produce 30-50 seeds per fruit on mature plants. Lophophora williamsii tend to stay below 25. Also flower colour, but both Lophophora fricii and Lophophora williamsii have pink flowers, and Lophophora fricii are not always a deeper pink than L. williamsii. Petal shape *may* be another way, but again nothing worth using to identify a specimen. Lastly would be rib shape. Lophophora williamsii tend to have straight ribs, and L. fricii tend to be rather variable; ours mostly being of zig-zag pattern.

Lophophora koehresii x Lophophora diffusa: Nothing has come from this cross in our attempts; however, we have only tried very few times. So far, nothing has happened, but in time we will find out more. Both species are self-sterile in our attempts at self-fertiization, so this should be an easy one to prove.

Lophophora koehresii x Lophophora fricii: Oddly enough this cross has not worked for us. The exact same Lophophora fricii and the exact same Lophophora koehresii were used to make the L. fricii x L. koeressi hybrids, but when crossed back using L. koehresii pollen to a L. fricii mother nothing developed. We are nto sure why this is, but it seems rather odd. Perhaps L. koehresii is more accepting of others, while L. fricii is only into its on kind.

Lophophora koehresii x Lophophora williamsii: Breeding Lophophora koehresii to Lophophora williamsii mothers creates the same problems as breeding anything to Lophophora williamsii. Lophophora williamsii is self-fertile so it is hard to controll who fertilizes it.

Lophophora williamsii x Lophophora diffusa: breeding Lophophora williamsii to Lophophora diffusa seems to not work. Other websites and cacti breeders seem toa gree on this. That said we have only tried a few times and will continue to try to see what comes of it.

Lophophora williamsii x Lophophora fricii: This cross also seems unviable. We have tried a few times with no evidence of fruit/seed development. Lophophora fricii is slef-sterile, which should make this one an easy one to figure out, and so far it looks like Lophophora williamsii and Lophophora fricii won't cross.

Lophophora williamsii x Lophophora koehresii: Lophophora williamsii bred with Lophophora koehresii has also proven unviable. We have attempted to breed these 2 together the most with zero success. Lophophora koehresii being self-fertile, this should be open and shut. Also, given the fact that Lophophora koehresii readily hybridizes with Lophophora fricii pollen and sets fruit relatively fast, we feel this cross is not possible with traditional breeding techniques.

Lophophora williamsii x Lophophora williamsii: Lophophora williamsii is self-fertile, in fact it appears to be the only self fertile variety aside from perhaps Lophophora decipiens and *possibly* Lophophora jourdaniana. When self-fertilized, Lophophora williamsii will often not produce many seeds. Self-fertilized Lophophora williamsii often produce 0-10 seeds per fruit, generally larger and older plants having more. When crossed with another plant, Lophophora williamsii will produce usually 10-25 seeds, 30+ not unheard of. In general, the bigger and older the plant, when crossed, produce the biggest seed yeilds. [Veiw photos Plant | Flower | Fruit]