well here are all the mirabilis species:
Mirabilis elegans
Mirabilis jalapa
Mirabilis laevis (aka mirabilis californica)
Mirabilis longiflora
Mirabilis multiflora (aka Quamoclidion multiflorum)
Mirabilis viscosa
from what I read on the web (that is to say very little info), mirabilis multiflora (known as SO'KSI) is suggested as a possible hallucinogen, mirabilis jalapa is also possibly psychoactive but it is a powerful emetic.
Both can be easily acquired from plant nurseries (or harvested from garden plantations around), also there's a webshop selling M.multiflora extract (cheap)
So, here's come the doc, it was originally from 'legal highs' (txt file), but sightly reformulated by webshops to make it more appealing:
M.multiflora is a magenta-flowered perennial found at elevations of 2500-5000 ft on hillsides among rocks and shrubs throughout Arizona, Utah, Colorado, and northern Mexico.
Hopi shamans chew the root and swallow its juice to induce visionary trances for diagnostic divination. No known negative effects. The Hopis use the root for stomach ailments, but a Hopi `Medicine Man' uses a copious amount of so'ksi or so'kya by chewing the large root and swallowing the juice while making his diagnosis; this permits him to expel the evil spirits residing in the body of the sick person. Root of similar species Mirabilis jalapa (four- o'clocks) may possess similar activity, but it is also a powerful emetic.
Note that M. multiflora has 2-5 flowers per calyx, while M. jalapa has only one.
Important: note that there's no evidence of mirabilis species having any psychoactive activity, and I couldn't find any reliable source for the info (meaning that I couldn't find the original source for the info that was quoted in the 'legal highs' text file).
Willow 11, according to the quote you made, M.jalapa might be active transdermally (which is good, as avoiding oral use is probably best considering it's an emetic).
And the very good thing here is that swim has a mirabilis jalapa plant in his garden, and will possibly be acquiring a mirabilis multiflora plant from a nursery this weekend
...swim enjoys growing plants, if mirabilis spp. grow fast enough to be harvested soon, then swim might give these a try. If so, swim will report, of course.