nice pix barry!
milkweed, there are native and non native species of it, i don't know that deer really bother it, certain species will grow in drier soil, i think the common milkweed is what we have. it can be invasive BUT where we see it grow is not invasive, very dry soil, so it is not taking over much of anything else and other plants are not competing with it. jen you can collect the seeds from this and plant. ours doesn't need much water, it seems to do well in my fields regardless of rain, and we don't water the fields. any butterfly or bees will benefit from milkweed.