name of blinds that roll up from the bottom or roll down from the top.?
Answers:
Sounds like you want Roman shades - at JCPenney's the ones that roll up from the bottom or down from top are called Ritz top down bottom up shades.
Other answers:
many are offered in either style by many companies
many are offered in either style by many companies
venetian?
They are not venetian, those ones have slats. The ones you are referring to are roller blinds or shades. They are a solid fabric or synthetic material, that you can hang from the top of your window and pull down or attach to bottom of window and pull up.
bamboo blinds or roman shades
The feature is called top down/bottom up. It is available on some manuf of roller shades, honeycomb shades, pleated shades, woven wood shades and roman fabric shades. Most of these fold or collapse when lowered or raised, the roller shade is the only one that will "roll".