Small rich blue-mauve flowers with white & yellow throats (photos 1 & 2) grace this Lobelia style plant with long thin stems and sparse thin & narrow leaves. 2 older leaves LHS of stem in photo 4, and many younger leaves forming at the base of flower stems, which can continue to grow and stand up when the main stem has become horizontal (photo 5). Flower buds can start as clusters (photo 3) and become more separated as the stem grows (photo 5). So it is both a straggler and an upright plant depending on maturity & location. I have seen leaf laden flower stems hanging down from a stream bank.