I too am growing this species! I ordered Desmanthus Leptolobus from Shamans-garden and I guess they don't know the difference between the two seeds because Illinois seeds are what I got.
The following is based upon what I've managed to learn by rote from researching on line...none of it is actualy knowledge verifyed by me. Yet8) .
Yeilds should be about two thirds the size of MHRB yeilds.
Take Endlessnesses advice on the seperation of gramine (thanks for that BTW Endlessness, I've been trying to figure that one out), I've read that it is nasty stuff and can cause brain damage or even death.
Although the root-bark isn't as potent as MHRB, the roots themselves also contain something like .25%-.3% DMT as well.
Desmanthus Leptolobus and Desmanthus Illinoensis share the same natural habitat and occur right next to each othe in the same space in nature.
I read somewhere that the reason those of us who live in the western U.S. don't see them all the time is apperantly because they have been pushed out by hybrid phalaris grasses that are even more invasive and cold hearty.
Desmanthus species can be quite cold hearty and flurish in sandy soil so I imagine wild crafting should be fairly easy, even in Colorado...
I can't seem to figure out how to post pictures to this forum otherwise I'd love to post a picture of my cute little seedlings. A good looking plant that acctualy folds up its' leaves at night and goes to sleep!
On some of them I plan to apply techniques used in the cultivation of horse radish in an attempt to get one big taproot to see if it increases bark and alkali yeild.
Sadly it may take excess of three years before sufficient root bark can be harvest ready...it's ok though with me because I have a growing list of new sources for spice to explore and I just can't belive how little mankind knows about the plants he uses for landscaping in his own front yard! It has inspired me to go back to school for entheo botany!