I have attempted extraction of a huge number of alkaloids from a huge number of plants. I can assure you that if you are looking for viable precursors to LSD it is MUCH MUCH easier to spend a little extra time and money obtaining ergotamine etc. then trying to extract LSA's from natural sources. IMO, the ways of getting LSD precursors rate like this, in order of preference:
1) Buy ergotamine/ergocristine/etc.
2) culture claviceps spp.
3) bulk extract ergotamine from migraine pills
4) bulk extract LSAs from HBRW
5) bulk extract LSAs from MG
6) bulk extract LSAs from stipa robusta
Sweet dreamz,
IudexK