@Pulsegleaner,
It would be interesting to know if your Ugandan Speckled Gray bean is related to my Rwanda Rainbow, and I suppose it could very well be possilbe. I'm sure all sorts of beans in Africa make the rounds from one grower to another.
To be fully clear that particular one is probably NOT Ugandan Speckled Grey. Based on the results I have gotten so far, Speckled grey is sort of a synthetic mix. That is, when Joe Simcox originally got them he actually got several distinct beans which grow true, as opposed to one variable species, and only thought they were one type.
The major parts of the mix consist of a little less than 50% of tan beans with fine purple mottling, similar to Pebblestone, (actually these are themselves dividable into four or five kinds, which differ in seed size and shape and the plants in both habit and day length [the commonest one this year is small seeded. functionally bushy (in the sense that only one has made anything like a climber and even that is short) early maturity (for these, a lot of the Uganadan one are so long they won't set flowers until October) with 3-4 seeded pods with light red streaking (one downside, once they get their first flush of beans, these seem to conk out pretty quickly)
The other major component is a solid purple/black bean that seems similar to my Fort Portal Violet (quiet tellingly, it also has FPV's most distinctive trait, EXTREMELY strong purple mottling on the growing cotyledons.)
That leaves the few real outliers I got in the original seed. There were 18 purple/black seeds with light white/tan speckles, which are in this years growth (as of now only one or two have flowered or podded, and they seem to be vigorous viners. This may be a "bridge" or cross between the first two as they can or can not have the cot mottling (2 do, about 9 do not)
There were seven or eight smallish ones like in your mix. Most of those are a odd shade of tan (a tan with a hint of purple) but one or two were dark red (and one of those produced)
However as I said, I don't consider those truly part of the Grey race. Not only is the size a LOT smaller than nearly all of the others, but the flowers are white (they're purple for all of the others)
There might be one clue whether they are the same down the road, besides white flowers. I remember the red one had an odd trait, the seed colored up red VERY early, early enough that even ABORTED seed will be fully red.
