Thanks, guys, I think you're right! None of the vines in my yard have fruit, but some in the trees in the woods out back do have the characteristic black fruit. Now, to post in the weed forum about how to control...

Okay. Thank you That is one good picture. The new leaves in the center can be seen to, now. Please be aware, that sometimes, the scapes in Hippeastrums fail to develop properly and rather hold on and will wilt.This appears to be occuring with these scapes right now.(The scape in the front look wrinkly). OR are they actually still elongating?If not, then try a rescue move the pot to a place with more heat from below. Temperatures of the substrate of up to 26deg CELSIUS are safe.

The foliage color is genetic -- they are either green leaved or bronze-leaved -- BUT, the culture and care influence the intensity of the color a lot. The more sun they get, the more color in the leaves. Shade makes them a lot less vibrant. Also, if they are grown slightly dry, they tend to have more intense foliage color, but you don't want to stress them so much they don't grow and bloom well.

I haven't experienced this but this site may help. http://homeguides.sfgate.com/blueberries-yellow-leaves-red-spots-42898.html