Question
Hi, I am looking for a species of vine that I can put in a planter above my windows to trail down as 'curtains' I have looked into philodendrons and pothos vines, but they both seem to be toxic to animals. any recommendations? thank you! -P

Answer
Sure do!

If you have enough light -- very bright but not baking intense sun -- you'll love the PASSIONFLOWER.  It's a vining houseplant absolutely dripping with the WOW! factor.  Intriguing fragrant violet flowers become into edible fruits if left on the plant.  It requires substantial light, but not full sun.  You can see a photo here:

http://www.indoorjungle.net/passiflora.html

For charm, few vines can beat POTHOS:

http://www.sfgate.com/cgi-bin/article.cgi?file=/c/a/2002/02/27/HO83301.DTL&type=...

and

http://boardroom.deepblue.com/HEG/Varieties/ShowCategoryDetails.aspx?categoryid=...

Pothos is a fast growing common basket plant.  It takes low light and is unfussy about care.

FATSHEDERA is an Ivy that will reach 6 to 10 feet at maturity:

http://www.floridata.com/ref/F/fats_liz.cfm

This vine grows best in part shade.  But it will tolerate darker growing conditions if needed.  It uses a lot of water.  Fatsehedera must be fastened in place as it grows because it does not have any clinging structures or aerial rootlets; its growth habit will do best therefore winding up through latticework.

FICUS PUMILA aka 'Creeping Ficus' is a fast growing vine for low light areas sometimes used as a drought tolerant groundcover in larger potted plants.  It climbs up walls clinging with aerial roots and can be trained easily in various shapes or to grow in prefered directions -- around windows, espalier, topiary forms.  Floridata.com warns that 'the vine relentlessly endeavors to coat everything it encounters in a green blanket' (http://www.floridata.com/ref/F/ficu_pum.cfm).  See this photos on the Digital Flora of Texas Library:

http://www.csdl.tamu.edu/FLORA/cgi/gallery_query?q=Ficus+pumila

How's that?  Need more?  Any questions?