Just out of curiosity, in case anyone knows. Apparently there are seven different species in the genus:
And one of them is Himalayan honeysuckle, a.k.a. pheasant berry, which I’m planning to grow.
Are any other species in its genus edible? If so, are any particularly special in some way, such as being extra cold tolerant, heat tolerant, drought tolerant, or tasty?
I’m curious about whether I should be trying to track down some of the other species it’s closely related to as good food plants. 
PFAF is my goto place for ediblity questions like this Leycesteria Himalayan Honeysuckle PFAF Plant Database.
I haven’t gotten around to researching Leycesteria genus for the Phylogenic Trees & Ediblity (Been busying Ironing out Vigna Beans). But Honeysuckles (Lonicera spp.) are notoriously known by foragers for having weird edibility traits, where 1 species is perfectly edible, another only having edible flowers, another being fully poisonous. However it’s super easy to understand which species are Crossable & edible once you see Phylogenic Trees as Honeysuckles neatly split into Subgenera/Sections that don’t cross with each other (Thus no risk of a Poisonous species crossing with an edible species).
I can assume it works similarly with Leycesteria as both are not just in the same Honeysuckle Family but in the same Subfamily Caprifolioideae. AND to top it off, Leycesteria ALONE was found to be sister to Lonicera (Meaning the 2 genera are very closely related, they are sister genera of each other).
This page may help understand their relationships https://bsapubs.onlinelibrary.wiley.com/doi/10.1002/ajb2.16143
I still wasn’t able to find a Phylogenic Tree for Leycesteria specifically to see where your Himalayan Honeysuckle fits in.
PFAF has the growing zone of Himalayan honeysuckle incorrect. It’s hardy to zone 7, not zone 10, ha ha! Mine easily sailed through a night of 9 degrees Fahrenheit a few weeks after I planted it. It wasn’t even fazed by a surprise snow in May after it had fully leafed out.
I didn’t know that honeysuckles in general are known for having weird edibility traits. I can see that! And I can certainly see that complicating things.
It really would be interesting if honeyberries and Himalayan honeysuckle could cross. If the two genera are that closely related, it may be a possible cross. Hmmmm . . .
Indeed but don’t worry about it. Edible Honeysuckles won’t cross with poisonous honeysuckles. Each Section of Honeysuckles stays to their own group. I’m wondering if it works out the same way with Leycesteria?
Indeed it would but despite them being very closely related Sister Genera, I don’t think they are still close enough to hybridize like that cuz even within the Honeysuckle genus lonicera Cross hybridizations don’t happen across different sections & That’s a good thing because Imagine if a Toxic Honeysuckle species could easily cross with an edible honeysuckle species!? Would put the edibility into question. Hence why Edible Honeysuckles & Poisonous are separated by section according to Phylogenic Trees, so they can only cross with species within their section.
Okay, yeah, that makes sense. Science is so cool! 