Phlogacanthus species ?

Phlogacanthus species ?;

herb for id mm 05082012:
small herb with large leaves and a single flower about 4 to 5 cm long,
it was growing wild near a garbage dump inside darjeeling botanical gardens,
first week of april,
wondering if it can be be identified
I can also see this image, Acanthaceae member....
It looks like a member of Phlogacanthus (not sure but).