AWESOME!!! I spent the whole day researching peas (Pisum & Lathyrus). It seems like Pisum is nested within Lathyrus. There are apparently 13 sections worldwide which would explain how diverse Lathryus can be so it could be fitting that Pisum is another section right? If i can confirm Hybridization across different sections within Lathyrus than that only increases the chances of Lathyrus x pisum working well. Perhaps there are some Lathyrus species that are very closely related to pisum. I haven’t figured out which species belong to which section yet & how strict Hybridization barriers are between sections.
For a general rule, subgenus = strict & section = not strict right? Solanum genus uses sections & Subgenus but Lathyrus so far only sections, where is the consistency?