it is four little blocks, joined straight together then turned on point ...
clues, clues, clues, everywhere a clue ... not that I can figure out what they mean! ... but it looks like the little blocks are half square triangle (biggest part of color) then the other half of the block is - - elenor burns did this in a basket of some kind ... will go look in a minute ... anyway, the other half of the little square are a bunch of little half square triangles, joined together
What would happen if you made a block of half square triangles, then cut a square as big as the 1/2 square triangle block.
draw a line down the middle of the straight color block, sew 1/4 inch on either side of the drawn line .... viola? two of the little blocks that go together to make half of the big square ... and I don't know the name, but is that how it is made, do you think?